目录

目标效果：

重点原理：

 1.js中art-template标准语法的循环输出

 2.js中split方法——转换字符串为数组

3.js中art-template标准语法的过滤器 

4.js中Date内置对象——getFullYear() 

5.js中Date内置对象——getMonth() 

6.js中Date内置对象——getDate() 

7.html中  表示空格 

8.三元表达式

代码部分： 

１.news.js（全是重点）

２.图书管理案例.html（重点，用于查看结构和定义art-template模板）

３.jquery.js（辅助作用）

４.template-web.js（辅助作用，art-template模板引擎文件）

５.news.css（辅助作用）

新闻列表案例-接口文档部分：

目标效果：

１.要可以用提供的接口，来获取新闻数据

２.运用art-template模板引擎，运用art-template标准语法中的循环输出，来展示所有的新闻信息

３.定义一个实现格式化时间的过滤器，使得每条新闻的发表时间显得较为正规

４.封装函数padZero，用来给月，日，时，分，秒<0时补零

e.g.最终效果：【由于总新闻条数较多，仅截取了部分内容】 

【由于接口中的图片地址可能有点问题，最终效果可能如下图，是显示不出图片的】

重点原理：

 1.js中art-template标准语法的循环输出

 2.js中split方法——转换字符串为数组

3.js中art-template标准语法的过滤器 

4.js中Date内置对象——getFullYear() 

5.js中Date内置对象——getMonth() 

6.js中Date内置对象——getDate() 

7.html中  表示空格 

8.三元表达式

代码部分： 

１.news.js（全是重点）

$(function () {//6.封装函数padZero，用来给月，日，时，分，秒<0时补零//为了保持时分秒一直是xx月—xx日 xx时:xx分:xx秒 的状态function padZero(n) {return n = n < 10 ? '0' + n : n;}//5.定义格式化时间的过滤器// 此处该过滤器名称是dateFormattemplate.defaults.imports.dateFormat = function (dtStr) {//dtStr接收html中$value.time的值var dt = new Date(dtStr);//根据给定的字符串得到一个日期对象var y = dt.getFullYear();//年var m = padZero(dt.getMonth() + 1);//月var d = padZero(dt.getDate());//日var hh = padZero(dt.getHours());//时var mm = padZero(dt.getMinutes());//分var ss = padZero(dt.getSeconds());//秒return y + '-' + m + '-' + d + '-' + hh + '-' + mm + '-' + ss;}//1.获取新闻数据//封装getNewsList函数，用来获取新闻列表function getNewsList() {$.get('http://www.liulongbin.top:3006/api/news',function (res) {if (res.status !== 200) return alert('获取新闻列表失败！');for (var i = 0; i < res.data.length; i++) {//用split(分隔符)将每一个新闻信息data中的标签tags，由字符串转换为数组res.data[i].tags = res.data[i].tags.split(',')}console.log(res);//3.调用template函数//template('模板的id',需要渲染的数据对象)//此处id不需要加#var htmlStr = template('tpl-news', res);//4.将htmlStr数据添加到id是news-list的div中$('#news-list').html(htmlStr);})}//调用getNewsList函数getNewsList();
})

２.图书管理案例.html（重点，用于查看结构和定义art-template模板）

３.jquery.js（辅助作用）

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.news-item {display: flex;border: 1px solid #eee;width: 700px;padding: 10px;margin-bottom: 5px;
}.thumb {display: block;width: 230px;height: 140px;background-color: #ccc;margin-right: 10px;
}.right-box {display: flex;flex-direction: column;justify-content: space-between;font-size: 12px;flex: 1;
}.title {font-size: 20px;font-weight: normal;
}.tags span {display: block;float: left;background-color: #F0F0F0;line-height: 20px;padding: 0 10px;border-radius: 10px;margin-right: 8px;
}.footer {display: flex;justify-content: space-between;
}

### 请求的根路径> http://www.liulongbin.top:3006### 新闻列表+ 接口URL：  /api/news
+ 调用方式： GET
+ 参数格式：无
+ 响应格式：| 数据名称  | 数据类型 | 说明                                         |
| --------- | -------- | -------------------------------------------- |
| status    | Number   | 200 获取新闻列表成功；500 获取新闻列表失败！ |
| msg       | String   | 对 status 字段的详细说明                     |
| data      | Array    | 新闻列表数组                                 |
| +id       | Number   | 新闻Id                                       |
| +title    | String   | 新闻标题                                     |
| +source   | String   | 新闻来源                                     |
| +cmtcount | Number   | 评论数量                                     |
| +tags     | String   | 标签                                         |
| +img      | String   | 图片地址                                     |
| +time     | String   | 发表时间                                     |+ 返回示例：```json
{"status": 200,"msg": "获取新闻列表成功","data": [{"id": 1,"title": "5G商用在即，三大运营商营收持续下降","source": "新京报经济新闻","cmtcount": 58,"tags": "三大运营商,中国移动,5G商用","img": "/images/0.webp","time": "2019-10-28T03:50:28.000Z"}]
}
```