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atom.xml
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<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<title>Hexo</title>
<link href="/atom.xml" rel="self"/>
<link href="http://yoursite.com/"/>
<updated>2020-02-29T03:30:04.101Z</updated>
<id>http://yoursite.com/</id>
<author>
<name>John Doe</name>
</author>
<generator uri="http://hexo.io/">Hexo</generator>
<entry>
<title>driving_test</title>
<link href="http://yoursite.com/2020/02/29/driving-test/"/>
<id>http://yoursite.com/2020/02/29/driving-test/</id>
<published>2020-02-29T02:56:19.000Z</published>
<updated>2020-02-29T03:30:04.101Z</updated>
<content type="html"><![CDATA[<link rel="stylesheet" class="aplayer-secondary-style-marker" href="\assets\css\APlayer.min.css"><script src="\assets\js\APlayer.min.js" class="aplayer-secondary-script-marker"></script><h1 id="考驾照科一笔记"><a href="#考驾照科一笔记" class="headerlink" title="考驾照科一笔记"></a>考驾照科一笔记</h1><a id="more"></a><ul><li><p>1<br> <img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200229/105922765.png" alt="mark"><br> tips：</p><p> 难度等级：<br> 《实施条例》第七十八条：<br> 同方向有2条车道的，左侧车道的最低车速为每小时100公里。</p></li><li><p>2<br> <img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200229/110117960.png" alt="mark"><br> tips:</p><p> 八停三减</p></li><li><p>3<br> <img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200229/110316308.png" alt="mark"><br> tips:</p><p> 三条的由120减去10得110，110-20得90，90-30得60，10.20.30逐项递减</p></li><li><p>4<br> <img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200229/111050799.png" alt="mark"><br> tips:</p><p> 车辆的灯光不仅仅是在光线不足的情况下提供照明，而更重要的是起到警示作用，即使在白<br> 天，人们也会首先注意到亮着灯的车辆，不管是行人还是其他车辆的司机。夜间在照明条件<br> 良好的路段行驶，应使用近光灯。</p></li><li><p>5<br> <img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200229/111320283.png" alt="mark"><br> tips:</p><p> 从图中可以看出，是没有中心线的道路。按照规定，机动车在道路上行驶不得超过限速标志、标线标明的速度。在没有限速标志、标线的道路上，没有道路中心线的道路，城市道路为每小时30公里，公路为每小时40公里。</p></li><li><p>6<br> <img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200229/111520406.png" alt="mark"><br> tips：</p><p> 《实施条例》第六十一条：<br> 牵引车和被牵引车均应当开启危险报警闪光灯。 </p></li><li><p>7<br> <img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200229/112602350.png" alt="mark"><br> tips：</p><p> 2016年4月1日已经实施的“公安部139号令”已经删除2012年的“公安部123令”中第十三条第二款关于“不能在暂住地初次申领大型货车驾驶证”的规定，取消了异地考驾照对客货车驾驶证的限制，客货车驾驶证也可以在暂住地申领了，但是需要有当地的居住证或者暂住证。</p></li><li><p>8<br> <img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200229/112920344.png" alt="mark"><br> tips：</p><p> 右转让左转 左转让直行 转弯让直行</p></li></ul>]]></content>
<summary type="html">
<h1 id="考驾照科一笔记"><a href="#考驾照科一笔记" class="headerlink" title="考驾照科一笔记"></a>考驾照科一笔记</h1>
</summary>
<category term="driver" scheme="http://yoursite.com/tags/driver/"/>
</entry>
<entry>
<title>angular</title>
<link href="http://yoursite.com/2020/02/16/angular/"/>
<id>http://yoursite.com/2020/02/16/angular/</id>
<published>2020-02-16T07:37:34.000Z</published>
<updated>2020-02-23T08:00:56.025Z</updated>
<content type="html"><![CDATA[<link rel="stylesheet" class="aplayer-secondary-style-marker" href="\assets\css\APlayer.min.css"><script src="\assets\js\APlayer.min.js" class="aplayer-secondary-script-marker"></script><h1 id="angular简介"><a href="#angular简介" class="headerlink" title="angular简介"></a>angular简介</h1><p><img src="https://gss3.bdstatic.com/-Po3dSag_xI4khGkpoWK1HF6hhy/baike/s%3D250/sign=b1b8a223d7ca7bcb797bc02a8e086b3f/5882b2b7d0a20cf4f21b653f76094b36adaf9943.jpg" alt></p><p>参考或转载:</p><p><a href="https://www.cnblogs.com/leolzi/p/11393195.html" target="_blank" rel="noopener">leolzi</a></p><p>AngularJS 诞生于2009年，由Misko Hevery 等人创建，后为Google所收购。是一款优秀的前端JS框架，已经被用于Google的多款产品当中。AngularJS有着诸多特性，最为核心的是：MVC（Model–view–controller）、模块化、自动化双向数据绑定、语义化标签、依赖注入等等。</p><a id="more"></a><p>#angular基础</p><h2 id="新建angular项目"><a href="#新建angular项目" class="headerlink" title="新建angular项目"></a>新建angular项目</h2><ul><li>ng new demo 新建文件</li><li>ng serve –open 开启项目<h2 id="angular项目目录"><a href="#angular项目目录" class="headerlink" title="angular项目目录"></a>angular项目目录</h2></li></ul><ul><li>node_modules 第三方依赖包存放目录</li><li>e2e 端到端的测试目录 用来做自动测试的</li><li>src 应用源代码目录 </li><li>.angular-cli.json Angular命令行工具的配置文件。后期可能会去修改它，引一些其他的第三方的包 比如jquery等</li><li>karma.conf.js karma是单元测试的执行器，karma.conf.js是karma的配置文件</li><li>package.json 这是一个标准的npm工具的配置文件，这个文件里面列出了该应用程序所使用的第三方依赖包。实际上我们在新建项目的时候，等了半天就是在下载第三方依赖包。下载完成后会放在node_modules这个目录中，后期我们可能会修改这个文件。</li><li>protractor.conf.js 也是一个做自动化测试的配置文件</li><li>README.md 说明文件</li><li>tslint.json 是tslint的配置文件，用来定义TypeScript代码质量检查的规则，不用管它<h2 id="src目录"><a href="#src目录" class="headerlink" title="src目录"></a>src目录</h2></li><li>app目录 包含应用的组件和模块，我们要写的代码都在这个目录</li><li>assets目录 资源目录，存储静态资源的 比如图片</li><li>environments目录 环境配置。Angular是支持多环境开发的，我们可以在不同的环境下（开发环境，测试环境，生产环境）共用一套代码，主要用来配置环境的</li><li>index.html 整个应用的根html，程序启动就是访问这个页面</li><li>main.ts 整个项目的入口点，Angular通过这个文件来启动项目</li><li>polyfills.ts 主要是用来导入一些必要库，为了让Angular能正常运行在老版本下</li><li>styles.css 主要是放一些全局的样式</li><li>tsconfig.app.json TypeScript编译器的配置,添加第三方依赖的时候会修改这个文件</li><li>tsconfig.spec.json 不用管</li><li>test.ts 也是自动化测试用的</li><li>typings.d.ts 不用管<h2 id="app-重要-目录"><a href="#app-重要-目录" class="headerlink" title="app(重要)目录"></a>app(重要)目录</h2>app目录是我们要编写的代码目录。我们写的代码都是放在这个目录。<br>一个Angular程序至少需要一个模块和一个组件。在我们新建项目的时候命令行已经默认生成出来了。<br><img src="https://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/QQ%E5%9B%BE%E7%89%8720200216170008.png" alt></li></ul><h2 id="新建组件并使用"><a href="#新建组件并使用" class="headerlink" title="新建组件并使用"></a>新建组件并使用</h2><ul><li>新建一个组件<br> 加入并使用<br> <img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200220/171338128.png" alt="mark"><ul><li>写到这发现了一个问题就是webstom的tslint.json里面ts规则，让报错非常离谱，于是我重新找了一个，测试可用，如下： <figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br><span class="line">109</span><br><span class="line">110</span><br><span class="line">111</span><br><span class="line">112</span><br><span class="line">113</span><br><span class="line">114</span><br><span class="line">115</span><br><span class="line">116</span><br><span class="line">117</span><br></pre></td><td class="code"><pre><span class="line">{</span><br><span class="line"> "extends": "tslint:recommended",</span><br><span class="line"> "rulesDirectory": [</span><br><span class="line"> "codelyzer"</span><br><span class="line"> ],</span><br><span class="line"> "rules": {</span><br><span class="line"> "array-type": false,</span><br><span class="line"> "arrow-parens": false,</span><br><span class="line"> "deprecation": {</span><br><span class="line"> "severity": "warn"</span><br><span class="line"> },</span><br><span class="line"> "import-blacklist": [</span><br><span class="line"> true,</span><br><span class="line"> "rxjs/Rx"</span><br><span class="line"> ],</span><br><span class="line"> "interface-name": false,</span><br><span class="line"> "max-classes-per-file": false,</span><br><span class="line"> "max-line-length": [</span><br><span class="line"> true,</span><br><span class="line"> 140</span><br><span class="line"> ],</span><br><span class="line"> "member-access": false,</span><br><span class="line"> "member-ordering": [</span><br><span class="line"> false,</span><br><span class="line"> {</span><br><span class="line"> "order": [</span><br><span class="line"> "static-field",</span><br><span class="line"> "instance-field",</span><br><span class="line"> "static-method",</span><br><span class="line"> "instance-method"</span><br><span class="line"> ]</span><br><span class="line"> }</span><br><span class="line"> ],</span><br><span class="line"> "no-consecutive-blank-lines": false,</span><br><span class="line"> "no-console": [</span><br><span class="line"> true,</span><br><span class="line"> "debug",</span><br><span class="line"> "info",</span><br><span class="line"> "time",</span><br><span class="line"> "timeEnd",</span><br><span class="line"> "trace"</span><br><span class="line"> ],</span><br><span class="line"> "no-empty": false,</span><br><span class="line"> "no-inferrable-types": [</span><br><span class="line"> true,</span><br><span class="line"> "ignore-params",</span><br><span class="line"> "ignore-properties"</span><br><span class="line"> ],</span><br><span class="line"> "no-non-null-assertion": true,</span><br><span class="line"> "no-redundant-jsdoc": true,</span><br><span class="line"> "no-switch-case-fall-through": true,</span><br><span class="line"> "no-use-before-declare": true,</span><br><span class="line"> "no-var-requires": false,</span><br><span class="line"> "object-literal-key-quotes": [</span><br><span class="line"> true,</span><br><span class="line"> "as-needed"</span><br><span class="line"> ],</span><br><span class="line"> "object-literal-sort-keys": false,</span><br><span class="line"> "ordered-imports": false,</span><br><span class="line"> "quotemark": [</span><br><span class="line"> false,</span><br><span class="line"> "single"</span><br><span class="line"> ],</span><br><span class="line"> "trailing-comma": false,</span><br><span class="line"> "no-output-on-prefix": true,</span><br><span class="line"> "use-input-property-decorator": true,</span><br><span class="line"> "use-output-property-decorator": true,</span><br><span class="line"> "use-host-property-decorator": true,</span><br><span class="line"> "no-input-rename": true,</span><br><span class="line"> "no-output-rename": true,</span><br><span class="line"> "use-life-cycle-interface": true,</span><br><span class="line"> "use-pipe-transform-interface": true,</span><br><span class="line"> "component-class-suffix": true,</span><br><span class="line"> "directive-class-suffix": true,</span><br><span class="line"> "class-name" : false,</span><br><span class="line"> "variable-name" : false,</span><br><span class="line"> "one-line" : true,</span><br><span class="line"> "no-boolean-literal-compare" : false,</span><br><span class="line"> "no-angle-bracket-type-assertion" : false,</span><br><span class="line"> "binary-expression-operand-order" : false,</span><br><span class="line"> "arrow-return-shorthand" : false,</span><br><span class="line"> "jsdoc-format" : false,</span><br><span class="line"> "interface-over-type-literal" : false,</span><br><span class="line"> "no-irregular-whitespace" : false,</span><br><span class="line"> "number-literal-format" : false,</span><br><span class="line"> "whitespace" : false,</span><br><span class="line"> "curly" : false,</span><br><span class="line"> "typedef-whitespace":[</span><br><span class="line"> false,</span><br><span class="line"> {</span><br><span class="line"> "call-signature": "nospace",</span><br><span class="line"> "index-signature": "nospace",</span><br><span class="line"> "parameter": "nospace",</span><br><span class="line"> "property-declaration": "nospace",</span><br><span class="line"> "variable-declaration": "nospace"</span><br><span class="line"> },</span><br><span class="line"> {</span><br><span class="line"> "call-signature": "onespace",</span><br><span class="line"> "index-signature": "onespace",</span><br><span class="line"> "parameter": "onespace",</span><br><span class="line"> "property-declaration": "onespace",</span><br><span class="line"> "variable-declaration": "onespace"</span><br><span class="line"> }</span><br><span class="line"> ],</span><br><span class="line"> "ban-types": [</span><br><span class="line"> false,</span><br><span class="line"> [</span><br><span class="line"> "Object",</span><br><span class="line"> "Use {} instead."</span><br><span class="line"> ],</span><br><span class="line"> ["String"]</span><br><span class="line"> ],</span><br><span class="line"> "prefer-const": false,</span><br><span class="line"> "no-trailing-whitespace": false,</span><br><span class="line"> "comment-format": false</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure></li></ul></li></ul><h2 id="html里引用ts属性"><a href="#html里引用ts属性" class="headerlink" title="html里引用ts属性"></a>html里引用ts属性</h2><ul><li><p>ts里书写的属性</p><p> <img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200221/170140173.png" alt="mark"></p><p> 发现一个问题，我看教程里面对象是要加:object对他进行规范的，而我规范了就会报错，最后去掉:object才成功在html引用到属性</p></li><li><p>html里的引用</p><p> <img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200221/170400313.png" alt="mark"></p></li><li><p>网页样式</p><p> <img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200221/170437802.png" alt="mark"></p></li><li><p>html标签使用angular属性</p><ul><li><p>绑定内容</p><p><code><div [title]="studentTitle">学生标题</div></code></p><p>效果如下：</p><p><img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200223/152854468.png" alt="mark"></p></li><li><p>angular的html解析标签 </p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">///未解析</span><br><span class="line"><div>{{content}}</div></span><br><span class="line">///解析</span><br><span class="line"><div [innerHTML]='content'></div></span><br></pre></td></tr></table></figure><p>效果如下:</p><p><img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200223/153027127.png" alt="mark"></p></li></ul></li><li><p>angular的html里可以进行简单的运算</p><p> <code><div>1+3=4</div></code></p><p> 效果如图：</p><p> <img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200223/154525294.png" alt="mark"></p></li><li><p>angular里的数组以及循环</p> <figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><div></span><br><span class="line"> <ul></span><br><span class="line"> <li *ngFor="let item of arr"></span><br><span class="line"> {{item}}</span><br><span class="line"> </li></span><br><span class="line"> </ul></span><br><span class="line"></div></span><br></pre></td></tr></table></figure><p> 效果如下：</p><p> <img src="http://goti-bucket.oss-cn-shanghai.aliyuncs.com/image/20200223/155447937.png" alt="mark"></p></li></ul>]]></content>
<summary type="html">
<h1 id="angular简介"><a href="#angular简介" class="headerlink" title="angular简介"></a>angular简介</h1><p><img src="https://gss3.bdstatic.com/-Po3dSag_xI4khGkpoWK1HF6hhy/baike/s%3D250/sign=b1b8a223d7ca7bcb797bc02a8e086b3f/5882b2b7d0a20cf4f21b653f76094b36adaf9943.jpg" alt></p>
<p>参考或转载:</p>
<p><a href="https://www.cnblogs.com/leolzi/p/11393195.html" target="_blank" rel="noopener">leolzi</a></p>
<p>AngularJS 诞生于2009年，由Misko Hevery 等人创建，后为Google所收购。是一款优秀的前端JS框架，已经被用于Google的多款产品当中。AngularJS有着诸多特性，最为核心的是：MVC（Model–view–controller）、模块化、自动化双向数据绑定、语义化标签、依赖注入等等。</p>
</summary>
<category term="web前端" scheme="http://yoursite.com/tags/web%E5%89%8D%E7%AB%AF/"/>
<category term="angular" scheme="http://yoursite.com/tags/angular/"/>
</entry>
<entry>
<title>mysql</title>
<link href="http://yoursite.com/2020/01/21/mysql/"/>
<id>http://yoursite.com/2020/01/21/mysql/</id>
<published>2020-01-21T02:47:11.000Z</published>
<updated>2020-02-23T08:00:38.842Z</updated>
<content type="html"><![CDATA[<link rel="stylesheet" class="aplayer-secondary-style-marker" href="\assets\css\APlayer.min.css"><script src="\assets\js\APlayer.min.js" class="aplayer-secondary-script-marker"></script><h1 id="mysql基础"><a href="#mysql基础" class="headerlink" title="mysql基础"></a>mysql基础</h1><p><img src="https://www.runoob.com/wp-content/uploads/2014/03/mysql.jpg" alt></p><p>结构化查询语言(Structured Query Language)简称SQL，mysql是流行的关系型数据库</p><a id="more"></a><h2 id="sql基本语法"><a href="#sql基本语法" class="headerlink" title="sql基本语法"></a>sql基本语法</h2><ul><li><p>新建表</p><p> SQL语句:<br> CREATE TABLE table_name (column_name column_type);</p></li></ul>]]></content>
<summary type="html">
<h1 id="mysql基础"><a href="#mysql基础" class="headerlink" title="mysql基础"></a>mysql基础</h1><p><img src="https://www.runoob.com/wp-content/uploads/2014/03/mysql.jpg" alt></p>
<p>结构化查询语言(Structured Query Language)简称SQL，mysql是流行的关系型数据库</p>
</summary>
<category term="mysql" scheme="http://yoursite.com/tags/mysql/"/>
<category term="sql" scheme="http://yoursite.com/tags/sql/"/>
</entry>
<entry>
<title>java基础</title>
<link href="http://yoursite.com/2019/08/18/java/"/>
<id>http://yoursite.com/2019/08/18/java/</id>
<published>2019-08-18T07:22:42.000Z</published>
<updated>2020-01-20T04:37:32.620Z</updated>
<content type="html"><![CDATA[<link rel="stylesheet" class="aplayer-secondary-style-marker" href="\assets\css\APlayer.min.css"><script src="\assets\js\APlayer.min.js" class="aplayer-secondary-script-marker"></script><h1 id="java基础"><a href="#java基础" class="headerlink" title="java基础"></a>java基础</h1><h2 id="该篇文章主要总结一下java的基础语法与基础知识点"><a href="#该篇文章主要总结一下java的基础语法与基础知识点" class="headerlink" title="该篇文章主要总结一下java的基础语法与基础知识点"></a>该篇文章主要总结一下java的基础语法与基础知识点</h2><a id="more"></a><h2 id="参考或出处："><a href="#参考或出处：" class="headerlink" title="参考或出处："></a>参考或出处：</h2><h2 id="打翻了牛顿吃饭的碗"><a href="#打翻了牛顿吃饭的碗" class="headerlink" title="- 打翻了牛顿吃饭的碗"></a>- <a href="https://www.cnblogs.com/zhaojinyan/p/9401010.html" target="_blank" rel="noopener">打翻了牛顿吃饭的碗</a></h2><h2 id="屌丝码农"><a href="#屌丝码农" class="headerlink" title="- 屌丝码农"></a>- <a href="https://www.cnblogs.com/pony1223/p/7608955.html" target="_blank" rel="noopener">屌丝码农</a></h2><h2 id="talenter"><a href="#talenter" class="headerlink" title="- talenter"></a>- <a href="https://www.cnblogs.com/talenter/p/9652976.html" target="_blank" rel="noopener">talenter</a></h2><ul><li><p>java中”||”和”|”的区别，以及”&&”与”&”的区别</p><ul><li>“||”和”|”的区别<ul><li>“||”表示逻辑或(也叫做短路或)，当左边为真时就返回true，不对右边继续进行判断</li><li>“|”表示按位或,当左边为真时继续判断右边，但是只要有一个为真时就会返回true</li></ul></li><li>“&&”与”&”的区别<ul><li>“&&”表示逻辑与(也叫做短路与)，当左边为假时就返回false，不对右边继续进行判断</li><li>“&”表示按位与，当左边为假时会继续判断右边，但是只要有一个为假时就会返回false</li></ul></li></ul></li><li><p>取整方法</p><ul><li><p>Math.ceil():表示向上取整；</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">Math.ceil(11.3)=12;Math.ceil(-11.3)=-12。</span><br></pre></td></tr></table></figure></li><li><p>Math.floor():表示向下取整；</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">Math.floor(11.6)=12;</span><br><span class="line">Math.floor(-11.6)=-12。</span><br></pre></td></tr></table></figure></li><li><p>Math.round():表示四舍五入；</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">Math.round(11.5)=12;</span><br><span class="line">Math.round(-11.5)=-11;</span><br></pre></td></tr></table></figure></li></ul></li><li><p>String s =new String (“syz”);创建了几个String Object?</p><ol><li><p>如果String常理池(常量缓冲区)中，已经创建”xyz”，则不会继续创建，此时只创建了一个对象new String(“xyz”)；</p></li><li><p>如果String常理池中，没有创建”xyz”，则会创建两个对象，一个对象的值是”xyz”，一个对象new String(“xyz”)。</p></li></ol></li><li><p>java23种设计模式</p><ul><li><p>设计模式的概念</p><ul><li>设计模式（Design pattern）是一套被反复使用、多数人知晓的、经过分类编目的、代码设计经验的总结。使用设计模式是为了可重用代码、让代码更容易被他人理解、保证代码可靠性。 毫无疑问，设计模式于己于他人于系统都是多赢的，设计模式使代码编制真正工程化，设计模式是软件工程的基石，如同大厦的一块块砖石一样。项目中合理的运用设计模式可以完美的解决很多问题，每种模式在现在中都有相应的原理来与之对应，每一个模式描述了一个在我们周围不断重复发生的问题，以及该问题的核心解决方案，这也是它能被广泛应用的原因。</li></ul></li><li><p>设计模式6大原则</p><ol><li><p>开闭原则（Open Close Principle）</p><p>开闭原则就是说对扩展开放，对修改关闭。在程序需要进行拓展的时候，不能去修改原有的代码，实现一个热插拔的效果。所以一句话概括就是：为了使程序的扩展性好，易于维护和升级。想要达到这样的效果，我们需要使用接口和抽象类，后面的具体设计中我们会提到这点。</p></li><li><p>里氏代换原则（Liskov Substitution Principle）</p><p>里氏代换原则(Liskov Substitution Principle LSP)面向对象设计的基本原则之一。 里氏代换原则中说，任何基类可以出现的地方，子类一定可以出现。 LSP是继承复用的基石，只有当衍生类可以替换掉基类，软件单位的功能不受到影响时，基类才能真正被复用，而衍生类也能够在基类的基础上增加新的行为。里氏代换原则是对“开-闭”原则的补充。实现“开-闭”原则的关键步骤就是抽象化。而基类与子类的继承关系就是抽象化的具体实现，所以里氏代换原则是对实现抽象化的具体步骤的规范。</p></li><li><p>依赖倒转原则（Dependence Inversion Principle）<br>这个是开闭原则的基础，具体内容：针对接口编程，依赖于抽象而不依赖于具体。</p></li><li><p>接口隔离原则（Interface Segregation Principle）</p><p>这个原则的意思是：使用多个隔离的接口，比使用单个接口要好。还是一个降低类之间的耦合度的意思，从这儿我们看出，其实设计模式就是一个软件的设计思想，从大型软件架构出发，为了升级和维护方便。所以上文中多次出现：降低依赖，降低耦合。</p></li><li><p>迪米特法则（最少知道原则）（Demeter Principle）</p><p>为什么叫最少知道原则，就是说：一个实体应当尽量少的与其他实体之间发生相互作用，使得系统功能模块相对独立。</p></li><li><p>合成复用原则（Composite Reuse Principle）</p><p>原则是尽量使用合成/聚合的方式，而不是使用继承。</p></li></ol></li><li><p>常用的设计模式</p><ol><li><p>工厂模式（Factory Method）</p><p> 常用的工厂模式是静态工厂，利用static方法，作为一种类似于常见的工具类Utils等辅助效果，一般情况下工厂类不需要实例化。</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br></pre></td><td class="code"><pre><span class="line">interface food{}</span><br><span class="line"></span><br><span class="line">class A implements food{}</span><br><span class="line">class B implements food{}</span><br><span class="line">class C implements food{}</span><br><span class="line"></span><br><span class="line">public class StaticFactory {</span><br><span class="line"></span><br><span class="line"> private StaticFactory(){}</span><br><span class="line"> </span><br><span class="line"> public static food getA(){ return new A(); }</span><br><span class="line"> public static food getB(){ return new B(); }</span><br><span class="line"> public static food getC(){ return new C(); }</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">class Client{</span><br><span class="line"> //客户端代码只需要将相应的参数传入即可得到对象</span><br><span class="line"> //用户不需要了解工厂类内部的逻辑。</span><br><span class="line"> public void get(String name){</span><br><span class="line"> food x = null ;</span><br><span class="line"> if ( name.equals("A")) {</span><br><span class="line"> x = StaticFactory.getA();</span><br><span class="line"> }else if ( name.equals("B")){</span><br><span class="line"> x = StaticFactory.getB();</span><br><span class="line"> }else {</span><br><span class="line"> x = StaticFactory.getC();</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure></li><li><p>抽象工厂模式（Abstract Factory</p><p> 一个基础接口定义了功能，每个实现接口的子类就是产品，然后定义一个工厂接口，实现了工厂接口的就是工厂，这时候，接口编程的优点就出现了，我们可以新增产品类（只需要实现产品接口），只需要同时新增一个工厂类，客户端就可以轻松调用新产品的代码。</p><p> 抽象工厂的灵活性就体现在这里，无需改动原有的代码，毕竟对于客户端来说，静态工厂模式在不改动StaticFactory类的代码时无法新增产品，如果采用了抽象工厂模式，就可以轻松的新增拓展类。</p><p>实例代码</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br></pre></td><td class="code"><pre><span class="line">interface food{}</span><br><span class="line"></span><br><span class="line">class A implements food{}</span><br><span class="line">class B implements food{}</span><br><span class="line"></span><br><span class="line">interface produce{ food get();}</span><br><span class="line"></span><br><span class="line">class FactoryForA implements produce{</span><br><span class="line"> @Override</span><br><span class="line"> public food get() {</span><br><span class="line"> return new A();</span><br><span class="line"> }</span><br><span class="line">}</span><br><span class="line">class FactoryForB implements produce{</span><br><span class="line"> @Override</span><br><span class="line"> public food get() {</span><br><span class="line"> return new B();</span><br><span class="line"> }</span><br><span class="line">}</span><br><span class="line">public class AbstractFactory {</span><br><span class="line"> public void ClientCode(String name){</span><br><span class="line"> food x= new FactoryForA().get();</span><br><span class="line"> x = new FactoryForB().get();</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure></li><li><p>单例模式（Singleton）</p><p> 在内部创建一个实例，构造器全部设置为private，所有方法均在该实例上改动，在创建上要注意类的实例化只能执行一次，可以采用许多种方法来实现，如Synchronized关键字，或者利用内部类等机制来实现。</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">public class Singleton {</span><br><span class="line">private Singleton(){}</span><br><span class="line"></span><br><span class="line">private static class SingletonBuild{</span><br><span class="line"> private static Singleton value = new Singleton();</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">public Singleton getInstance(){ return SingletonBuild.value ;}</span><br></pre></td></tr></table></figure></li><li><p>建造者模式（Builder）</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br></pre></td><td class="code"><pre><span class="line">public class Builder {</span><br><span class="line"></span><br><span class="line"> static class Student{</span><br><span class="line"> String name = null ;</span><br><span class="line"> int number = -1 ;</span><br><span class="line"> String sex = null ;</span><br><span class="line"> int age = -1 ;</span><br><span class="line"> String school = null ;</span><br><span class="line"></span><br><span class="line"> //构建器，利用构建器作为参数来构建Student对象</span><br><span class="line"> static class StudentBuilder{</span><br><span class="line"> String name = null ;</span><br><span class="line"> int number = -1 ;</span><br><span class="line"> String sex = null ;</span><br><span class="line"> int age = -1 ;</span><br><span class="line"> String school = null ;</span><br><span class="line"> public StudentBuilder setName(String name) {</span><br><span class="line"> this.name = name;</span><br><span class="line"> return this ;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public StudentBuilder setNumber(int number) {</span><br><span class="line"> this.number = number;</span><br><span class="line"> return this ;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public StudentBuilder setSex(String sex) {</span><br><span class="line"> this.sex = sex;</span><br><span class="line"> return this ;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public StudentBuilder setAge(int age) {</span><br><span class="line"> this.age = age;</span><br><span class="line"> return this ;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public StudentBuilder setSchool(String school) {</span><br><span class="line"> this.school = school;</span><br><span class="line"> return this ;</span><br><span class="line"> }</span><br><span class="line"> public Student build() {</span><br><span class="line"> return new Student(this);</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public Student(StudentBuilder builder){</span><br><span class="line"> this.age = builder.age;</span><br><span class="line"> this.name = builder.name;</span><br><span class="line"> this.number = builder.number;</span><br><span class="line"> this.school = builder.school ;</span><br><span class="line"> this.sex = builder.sex ;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static void main( String[] args ){</span><br><span class="line"> Student a = new Student.StudentBuilder().setAge(13).setName("LiHua").build();</span><br><span class="line"> Student b = new Student.StudentBuilder().setSchool("sc").setSex("Male").setName("ZhangSan").build();</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure></li><li><p>原型模式（Protype）<br>原型模式就是讲一个对象作为原型，使用clone()方法来创建新的实例。</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br></pre></td><td class="code"><pre><span class="line">public class Prototype implements Cloneable{</span><br><span class="line"></span><br><span class="line"> private String name;</span><br><span class="line"></span><br><span class="line"> public String getName() {</span><br><span class="line"> return name;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public void setName(String name) {</span><br><span class="line"> this.name = name;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> @Override</span><br><span class="line"> protected Object clone() {</span><br><span class="line"> try {</span><br><span class="line"> return super.clone();</span><br><span class="line"> } catch (CloneNotSupportedException e) {</span><br><span class="line"> e.printStackTrace();</span><br><span class="line"> }finally {</span><br><span class="line"> return null;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static void main ( String[] args){</span><br><span class="line"> Prototype pro = new Prototype();</span><br><span class="line"> Prototype pro1 = (Prototype)pro.clone();</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure><p>此处使用的是浅拷贝，关于深浅拷贝，大家可以另行查找相关资料。</p></li><li><p>适配器模式（Adapter）</p><p>适配器模式的作用就是在原来的类上提供新功能。主要可分为3种：</p><ol><li><p>类适配：创建新类，继承源类，并实现新接口，例如 </p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">class adapter extends oldClass implements newFunc{}</span><br></pre></td></tr></table></figure></li><li><p>对象适配：创建新类持源类的实例，并实现新接口，例如 </p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">class adapter implements newFunc { private oldClass oldInstance ;}</span><br></pre></td></tr></table></figure></li><li><p>接口适配：创建新的抽象类实现旧接口方法。例如 </p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">abstract class adapter implements oldClassFunc { void newFunc();}</span><br></pre></td></tr></table></figure></li></ol></li><li><p>装饰模式（Decorator)</p><p> 给一类对象增加新的功能，装饰方法与具体的内部逻辑无关。例如：</p> <figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line">interface Source{ void method();}</span><br><span class="line"> public class Decorator implements Source{</span><br><span class="line"></span><br><span class="line"> private Source source ;</span><br><span class="line"> public void decotate1(){</span><br><span class="line"> System.out.println("decorate");</span><br><span class="line"> }</span><br><span class="line"> @Override</span><br><span class="line"> public void method() {</span><br><span class="line"> decotate1();</span><br><span class="line"> source.method();</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure></li><li><p>代理模式（Proxy）<br>客户端通过代理类访问，代理类实现具体的实现细节，客户只需要使用代理类即可实现操作。</p><p>这种模式可以对旧功能进行代理，用一个代理类调用原有的方法，且对产生的结果进行控制。</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br></pre></td><td class="code"><pre><span class="line">interface Source{ void method();}</span><br><span class="line"></span><br><span class="line">class OldClass implements Source{</span><br><span class="line"> @Override</span><br><span class="line"> public void method() {</span><br><span class="line"> }</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">class Proxy implements Source{</span><br><span class="line"> private Source source = new OldClass();</span><br><span class="line"></span><br><span class="line"> void doSomething(){}</span><br><span class="line"> @Override</span><br><span class="line"> public void method() {</span><br><span class="line"> new Class1().Func1();</span><br><span class="line"> source.method();</span><br><span class="line"> new Class2().Func2();</span><br><span class="line"> doSomething();</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure></li><li><p>外观模式（Facade）</p><p>为子系统中的一组接口提供一个一致的界面，定义一个高层接口，这个接口使得这一子系统更加容易使用。这句话是百度百科的解释，有点难懂，但是没事，看下面的例子，我们在启动停止所有子系统的时候，为它们设计一个外观类，这样就可以实现统一的接口，这样即使有新增的子系统subSystem4,也可以在不修改客户端代码的情况下轻松完成。</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line">public class Facade {</span><br><span class="line"> private subSystem1 subSystem1 = new subSystem1();</span><br><span class="line"> private subSystem2 subSystem2 = new subSystem2();</span><br><span class="line"> private subSystem3 subSystem3 = new subSystem3();</span><br><span class="line"> </span><br><span class="line"> public void startSystem(){</span><br><span class="line"> subSystem1.start();</span><br><span class="line"> subSystem2.start();</span><br><span class="line"> subSystem3.start();</span><br><span class="line"> }</span><br><span class="line"> </span><br><span class="line"> public void stopSystem(){</span><br><span class="line"> subSystem1.stop();</span><br><span class="line"> subSystem2.stop();</span><br><span class="line"> subSystem3.stop();</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure></li><li><p>桥接模式（Bridge）<br>桥接（Bridge）是用于把抽象化与实现化解耦，使得二者可以独立变化。这种类型的设计模式属于结构型模式，它通过提供抽象化和实现化之间的桥接结构，来实现二者的解耦。</p><p>这种模式涉及到一个作为桥接的接口，使得实体类的功能独立于接口实现类。这两种类型的类可被结构化改变而互不影响。</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br></pre></td><td class="code"><pre><span class="line"> interface DrawAPI {</span><br><span class="line"> public void drawCircle(int radius, int x, int y);</span><br><span class="line">}</span><br><span class="line">class RedCircle implements DrawAPI {</span><br><span class="line"> @Override</span><br><span class="line"> public void drawCircle(int radius, int x, int y) {</span><br><span class="line"> System.out.println("Drawing Circle[ color: red, radius: "</span><br><span class="line"> + radius +", x: " +x+", "+ y +"]");</span><br><span class="line"> }</span><br><span class="line">}</span><br><span class="line">class GreenCircle implements DrawAPI {</span><br><span class="line"> @Override</span><br><span class="line"> public void drawCircle(int radius, int x, int y) {</span><br><span class="line"> System.out.println("Drawing Circle[ color: green, radius: "</span><br><span class="line"> + radius +", x: " +x+", "+ y +"]");</span><br><span class="line"> }</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">abstract class Shape {</span><br><span class="line"> protected DrawAPI drawAPI;</span><br><span class="line"> protected Shape(DrawAPI drawAPI){</span><br><span class="line"> this.drawAPI = drawAPI;</span><br><span class="line"> }</span><br><span class="line"> public abstract void draw();</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">class Circle extends Shape {</span><br><span class="line"> private int x, y, radius;</span><br><span class="line"></span><br><span class="line"> public Circle(int x, int y, int radius, DrawAPI drawAPI) {</span><br><span class="line"> super(drawAPI);</span><br><span class="line"> this.x = x;</span><br><span class="line"> this.y = y;</span><br><span class="line"> this.radius = radius;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public void draw() {</span><br><span class="line"> drawAPI.drawCircle(radius,x,y);</span><br><span class="line"> }</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">//客户端使用代码</span><br><span class="line">Shape redCircle = new Circle(100,100, 10, new RedCircle());</span><br><span class="line">Shape greenCircle = new Circle(100,100, 10, new GreenCircle());</span><br><span class="line">redCircle.draw();</span><br><span class="line">greenCircle.draw();</span><br></pre></td></tr></table></figure></li><li><p>组合模式（Composite）</p><p> 组合模式是为了表示那些层次结构，同时部分和整体也可能是一样的结构，常见的如文件夹或者树。举例：</p> <figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br></pre></td><td class="code"><pre><span class="line">abstract class component{}</span><br><span class="line"></span><br><span class="line">class File extends component{ String filename;}</span><br><span class="line"></span><br><span class="line">class Folder extends component{</span><br><span class="line"> component[] files ; //既可以放文件File类，也可以放文件夹Folder类。Folder类下又有子文件或子文件夹。</span><br><span class="line"> String foldername ;</span><br><span class="line"> public Folder(component[] source){ files = source ;}</span><br><span class="line"> </span><br><span class="line"> public void scan(){</span><br><span class="line"> for ( component f:files){</span><br><span class="line"> if ( f instanceof File){</span><br><span class="line"> System.out.println("File "+((File) f).filename);</span><br><span class="line"> }else if(f instanceof Folder){</span><br><span class="line"> Folder e = (Folder)f ;</span><br><span class="line"> System.out.println("Folder "+e.foldername);</span><br><span class="line"> e.scan();</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> } </span><br><span class="line">}</span><br></pre></td></tr></table></figure></li></ol></li></ul><ol start="12"><li>享元模式（Flyweight）<br>使用共享对象的方法，用来尽可能减少内存使用量以及分享资讯。通常使用工厂类辅助，例子中使用一个HashMap类进行辅助判断，数据池中是否已经有了目标实例，如果有，则直接返回，不需要多次创建重复实例。<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br></pre></td><td class="code"><pre><span class="line">abstract class flywei{ }</span><br><span class="line"></span><br><span class="line">public class Flyweight extends flywei{</span><br><span class="line"> Object obj ;</span><br><span class="line"> public Flyweight(Object obj){</span><br><span class="line"> this.obj = obj;</span><br><span class="line"> }</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">class FlyweightFactory{</span><br><span class="line"> private HashMap<Object,Flyweight> data;</span><br><span class="line"></span><br><span class="line"> public FlyweightFactory(){ data = new HashMap<>();}</span><br><span class="line"></span><br><span class="line"> public Flyweight getFlyweight(Object object){</span><br><span class="line"> if ( data.containsKey(object)){</span><br><span class="line"> return data.get(object);</span><br><span class="line"> }else {</span><br><span class="line"> Flyweight flyweight = new Flyweight(object);</span><br><span class="line"> data.put(object,flyweight);</span><br><span class="line"> return flyweight;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure></li></ol></li></ul>]]></content>
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<h1 id="java基础"><a href="#java基础" class="headerlink" title="java基础"></a>java基础</h1><h2 id="该篇文章主要总结一下java的基础语法与基础知识点"><a href="#该篇文章主要总结一下java的基础语法与基础知识点" class="headerlink" title="该篇文章主要总结一下java的基础语法与基础知识点"></a>该篇文章主要总结一下java的基础语法与基础知识点</h2>
</summary>
<category term="笔记" scheme="http://yoursite.com/tags/%E7%AC%94%E8%AE%B0/"/>
<category term="java" scheme="http://yoursite.com/tags/java/"/>
</entry>
<entry>
<title>unityNotas</title>
<link href="http://yoursite.com/2019/08/15/unityNotas/"/>
<id>http://yoursite.com/2019/08/15/unityNotas/</id>
<published>2019-08-15T12:27:00.000Z</published>
<updated>2020-01-20T04:37:32.621Z</updated>
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<link rel="stylesheet" class="aplayer-secondary-style-marker" href="\assets\css\APlayer.min.css"><script src="\assets\js\APlayer.min.js" cla
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<category term="unity" scheme="http://yoursite.com/tags/unity/"/>
<category term="笔记" scheme="http://yoursite.com/tags/%E7%AC%94%E8%AE%B0/"/>
</entry>
<entry>
<title>markDown语法</title>
<link href="http://yoursite.com/2019/08/11/HelloWorld/"/>
<id>http://yoursite.com/2019/08/11/HelloWorld/</id>
<published>2019-08-11T11:40:10.000Z</published>
<updated>2020-01-20T04:37:32.619Z</updated>
<content type="html"><</span><br></pre></td></tr></table></figure><p><img src="http://108.160.130.156/image/1.jpg" alt="这是一个表情包图片" title="示例图片"><br>链接</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">[这是一个超链接](https://www.baidu.com)</span><br></pre></td></tr></table></figure><p><a href="https://www.baidu.com" target="_blank" rel="noopener">这是一个超链接</a></p><h2 id="5-列表"><a href="#5-列表" class="headerlink" title="5.列表"></a>5.列表</h2><h3 id="有序列表"><a href="#有序列表" class="headerlink" title="有序列表"></a>有序列表</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">1. 内容</span><br><span class="line">2. 内容</span><br><span class="line">3. 内容</span><br></pre></td></tr></table></figure><p>效果如下</p><ol><li>内容</li><li>内容</li><li>内容</li></ol><h3 id="无序列表"><a href="#无序列表" class="headerlink" title="无序列表"></a>无序列表</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">- 列表内容</span><br><span class="line">+ 列表内容</span><br><span class="line">* 列表内容</span><br></pre></td></tr></table></figure><p>效果如下</p><ul><li>列表内容</li></ul><ul><li>列表内容</li></ul><ul><li>列表内容</li></ul><h3 id="列表嵌套"><a href="#列表嵌套" class="headerlink" title="列表嵌套"></a>列表嵌套</h3><p>上一级和下一级之间敲三个空格即可</p><ul><li><p>一级无序列表内容</p><ul><li>二级无序列表内容</li><li>二级无序列表内容</li><li>二级无序列表内容</li></ul></li><li><p>一级无序列表内容</p><ol><li>二级有序列表内容</li><li>二级有序列表内容</li><li>二级有序列表内容</li></ol></li></ul><ol><li><p>一级有序列表内容</p><ul><li>二级无序列表内容</li><li>二级无序列表内容</li><li>二级无序列表内容</li></ul></li><li><p>一级有序列表内容</p><ol><li>二级有序列表内容</li><li>二级有序列表内容</li><li>二级有序列表内容</li></ol></li></ol><h2 id="6-表格"><a href="#6-表格" class="headerlink" title="6.表格"></a>6.表格</h2><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line">|表头|表头|表头|</span><br><span class="line">|---|:--:|---:|</span><br><span class="line">|内容|内容|内容|</span><br><span class="line">|内容|内容|内容|</span><br><span class="line"></span><br><span class="line">第二行分割表头和内容。</span><br><span class="line">- 有一个就行，为了对齐，多加了几个</span><br><span class="line">文字默认居左</span><br><span class="line">-两边加：表示文字居中</span><br><span class="line">-右边加：表示文字居右</span><br></pre></td></tr></table></figure><p>效果</p><table><thead><tr><th>姓名</th><th align="center">技能</th><th align="center">名言</th></tr></thead><tbody><tr><td>cxk</td><td align="center">唱跳rap打篮球</td><td align="center">你干嘛？</td></tr><tr><td>芦苇</td><td align="center">使用高新科技</td><td align="center">我芦苇没有开挂！</td></tr><tr><td>杰哥</td><td align="center">检查身体</td><td align="center">让我康康！</td></tr></tbody></table><h2 id="7-代码"><a href="#7-代码" class="headerlink" title="7.代码"></a>7.代码</h2><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">`单行代码`</span><br><span class="line"></span><br><span class="line">(```)</span><br><span class="line">多行代码</span><br><span class="line">(```)</span><br><span class="line">使用多行代码的时候去除括号，加括号是为了防止转译</span><br></pre></td></tr></table></figure><p>效果如下</p><p><code>单行代码</code></p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">多行代码</span><br></pre></td></tr></table></figure><h2 id="8-分割线"><a href="#8-分割线" class="headerlink" title="8.分割线"></a>8.分割线</h2><p>三个或者三个以上的 - 或者 * 都可以。</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">---</span><br><span class="line">----</span><br><span class="line">***</span><br><span class="line">*****</span><br></pre></td></tr></table></figure><p>效果</p><hr><hr><hr><hr><h2 id="9-音乐以及视频"><a href="#9-音乐以及视频" class="headerlink" title="9.音乐以及视频"></a>9.音乐以及视频</h2><p>先装两个插件</p><p><a href="/~https://github.com/grzhan/hexo-tag-aplayer#upstream-issue" title="aplayer插件" target="_blank" rel="noopener">aplayer插件</a></p><p><a href="/~https://github.com/NextMoe/hexo-tag-dplayer" title="dplayer插件" target="_blank" rel="noopener">dplayer插件</a></p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">npm install hexo-tag-dplayer --save</span><br><span class="line">npm install hexo-tag-aplayer --save</span><br></pre></td></tr></table></figure><ul><li><p>音乐</p><ul><li><p>网易云</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><iframe frameborder="no" border="0" marginwidth="0" marginheight="0" width=330 height=450 src="//music.163.com/outchain/player?type=0&id=2937381224&auto=0&height=430"></iframe></span><br></pre></td></tr></table></figure><p>效果</p><iframe frameborder="no" border="0" marginwidth="0" marginheight="0" width="330" height="450" src="//music.163.com/outchain/player?type=0&id=2937381224&auto=0&height=430"></iframe></li><li><p>aplayer插件</p><ul><li>单个曲目<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line">title : 曲目标题</span><br><span class="line">author: 曲目作者</span><br><span class="line">url: 音乐文件 URL 地址</span><br><span class="line">picture_url: (可选) 音乐对应的图片地址</span><br><span class="line">narrow: （可选）播放器袖珍风格</span><br><span class="line">autoplay: (可选) 自动播放，移动端浏览器暂时不支持此功能</span><br><span class="line">width:xxx: (可选) 播放器宽度 (默认: 100%)</span><br><span class="line">lrc:xxx: （可选）歌词文件 URL 地址</span><br><span class="line">{% aplayer "风笛" "DDBY" "http://108.160.130.156/music/DDBY_-_风笛.mp3</span><br><span class="line">" "autoplay" %}</span><br></pre></td></tr></table></figure></li></ul></li></ul><p>效果</p> <div id="aplayer-eDkhPoBd" class="aplayer aplayer-tag-marker" style="margin-bottom: 20px;"> <pre class="aplayer-lrc-content"></pre> </div> <script> var ap = new APlayer({ element: document.getElementById("aplayer-eDkhPoBd"), narrow: false, autoplay: false, showlrc: false, music: { title: "风笛", author: "DDBY", url: "http://108.160.130.156/music/DDBY_-_风笛.mp3", pic: "", lrc: "" } }); window.aplayers || (window.aplayers = []); window.aplayers.push(ap); </script><ul><li><p>列表</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br></pre></td><td class="code"><pre><span class="line"> {% aplayerlist %}</span><br><span class="line">{</span><br><span class="line"> "narrow": false, // （可选）播放器袖珍风格</span><br><span class="line"> "autoplay": true, // （可选) 自动播放，移动端浏览器暂时不支持此功能</span><br><span class="line"> "mode": "random", // （可选）曲目循环类型，有 'random'（随机播放）, 'single' (单曲播放), 'circulation' (循环播放), 'order' (列表播放)， 默认：'circulation'</span><br><span class="line"> "showlrc": 3, // （可选）歌词显示配置项，可选项有：1,2,3</span><br><span class="line"> "mutex": true, // （可选）该选项开启时，如果同页面有其他 aplayer 播放，该播放器会暂停</span><br><span class="line"> "theme": "#e6d0b2", // （可选）播放器风格色彩设置，默认：#b7daff</span><br><span class="line"> "preload": "metadata", // （可选）音乐文件预载入模式，可选项： 'none' 'metadata' 'auto', 默认: 'auto'</span><br><span class="line"> "listmaxheight": "513px", // (可选) 该播放列表的最大长度</span><br><span class="line"> "music": [</span><br><span class="line"> {</span><br><span class="line"> "title": "CoCo",</span><br><span class="line"> "author": "Jeff Williams",</span><br><span class="line"> "url": "caffeine.mp3",</span><br><span class="line"> "pic": "caffeine.jpeg",</span><br><span class="line"> "lrc": "caffeine.txt"</span><br><span class="line"> },</span><br><span class="line"> {</span><br><span class="line"> "title": "アイロニ",</span><br><span class="line"> "author": "鹿乃",</span><br><span class="line"> "url": "irony.mp3",</span><br><span class="line"> "pic": "irony.jpg"</span><br><span class="line"> }</span><br><span class="line"> ]</span><br><span class="line">}</span><br><span class="line">{% endaplayerlist %}</span><br></pre></td></tr></table></figure><p>效果</p> <div id="aplayer-HplvpspF" class="aplayer aplayer-tag-marker" style="margin-bottom: 20px;"></div> <script> var options = {"narrow":false,"autoplay":false,"showlrc":3,"mode":"random","mutex":true,"theme":"#e6d0b2","preload":"metadata","listmaxheight":"513px","music":[{"title":"风笛","author":"DDBY","url":"http://108.160.130.156/music/DDBY_-_风笛.mp3","pic":""},{"title":"ミシロタウン","author":"景山将太","url":"http://108.160.130.156/music/景山将太_-_ミシロタウン.mp3","pic":""},{"title":"原風景","author":"mamomo","url":"http://108.160.130.156/music/mamomo_-_原風景.mp3","pic":""}]}; options.element = document.getElementById("aplayer-HplvpspF"); var ap = new APlayer(options); window.aplayers || (window.aplayers = []); window.aplayers.push(ap); </script></li></ul></li><li><p>视频</p><ul><li><p>原生视频</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><video id="video" controls="" preload="none" poster="" height="420" width="800" ></span><br><span class="line"> <source id="mp4" src="https://goti-bucket.oss-cn-shanghai.aliyuncs.com/movie/kiminama.mp4" type="video/mp4"></span><br></pre></td></tr></table></figure><p>效果</p><video id="video" controls preload="none" poster height="420" width="800"> <source id="mp4" src="https://goti-bucket.oss-cn-shanghai.aliyuncs.com/movie/kiminama.mp4" type="video/mp4"></video></li><li><p>dplayer插件</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{% dplayer "url=https://goti-bucket.oss-cn-shanghai.aliyuncs.com/movie/kiminama.mp4" "loop=no" "theme=#FADFA3" "autoplay=false" "token=tokendemo" %}</span><br></pre></td></tr></table></figure><p>效果</p><div id="dplayer0" class="dplayer hexo-tag-dplayer-mark" style="margin-bottom: 20px;"></div><script>(function(){var player = new DPlayer({"container":document.getElementById("dplayer0"),"theme":"#FADFA3","video":{"url":"https://goti-bucket.oss-cn-shanghai.aliyuncs.com/movie/kiminama.mp4"}});window.dplayers||(window.dplayers=[]);window.dplayers.push(player);})()</script></li></ul></li><li><p>字体、字号、颜色设置</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><font face="微软雅黑" >微软雅黑字体</font></span><br><span class="line"><font face="黑体" >黑体</font></span><br><span class="line"><font size=3 >3号字</font></span><br><span class="line"><font size=4 >4号字</font></span><br><span class="line"><font color=#FF0000 >红色</font></span><br><span class="line"><font color=#008000 >绿色</font></span><br><span class="line"><font color=#0000FF >蓝色</font></span><br></pre></td></tr></table></figure><ul><li><font face="微软雅黑">微软雅黑字体</font><br><font face="黑体">黑体</font><br><font size="3">3号字</font><br><font size="4">4号字</font><br><font color="#FF0000">红色</font><br><font color="#008000">绿色</font><br><font color="#0000FF">蓝色</font></li></ul></li></ul>]]></content>
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<h1 id="MarkDown语法学习"><a href="#MarkDown语法学习" class="headerlink" title="MarkDown语法学习"></a>MarkDown语法学习</h1><p>参考<a href="https://www.jianshu.com/p/191d1e21f7ed" target="_blank" rel="noopener">高鸿祥</a><br>这是一个goti学习markDown语法的文章</p>
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<category term="markDown语法" scheme="http://yoursite.com/tags/markDown%E8%AF%AD%E6%B3%95/"/>
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