经常用到嵌套循环渲染数据
比如 在一个html页面上渲染 全国所有的 省直辖市 及其下辖的市县
省级对市县 一般是一对多的关系
在循环遍历省级单位时
需要对他的子集也进行遍历
市县类
public class City implements Serializable {
private static final long serialVersionUID = 1876407617666848861L;
private String cityId;
private String cityName;
private String provincialId;
public String getCityId() {
return cityId;
}
public void setCityId(String cityId) {
this.cityId = cityId;
}
public String getCityName() {
return cityName;
}
public void setCityName(String cityName) {
this.cityName = cityName;
}
public String getProvincialId() {
return provincialId;
}
public void setProvincialId(String provincialId) {
this.provincialId = provincialId;
}
@Override
public String toString() {
return "{" +
"cityId:" + cityId +
", cityName:" + cityName +
", provincialId:" + provincialId +
'}';
}
}省级类
public class Provincial implements Serializable {
private static final long serialVersionUID = 1167623414373639514L;
private String provincialId;
private String provincialName;
private List<City> cityList; // 市县的集合
public String getProvincialId() {
return provincialId;
}
public void setProvincialId(String provincialId) {
this.provincialId = provincialId;
}
public String getProvincialName() {
return provincialName;
}
public void setProvincialName(String provincialName) {
this.provincialName = provincialName;
}
public List<City> getCityList() {
return cityList;
}
public void setCityList(List<City> cityList) {
this.cityList = cityList;
}
@Override
public String toString() {
return "{" +
"provincialId:" + provincialId +
", provincialName:" + provincialName +
", cityList:" + cityList +
'}';
}
}如果是简单的列表遍历 应该不是问题 如果是 在一些模板中 或者html中 往往无法在正常情况下 使用vue的指令
经过研究vue的 api 发现可以在
<template></template>使用避免以下情况
<table border="1" style="border-collapse:collapse">
<tr>
<th>城市序号</th>
<th>城市名称</th>
<th>所属城市代号</th>
</tr>
在下面的tr 标签中 无法加入v-for 来嵌套的情况
<tr >
<th colspan="3">{{pro.provincialName}}</th>
</tr>
<tr>
<td>{{city.cityId}}</td>
<td>{{city.cityName}}</td>
<td>{{city.provincialId}}</td>
</tr>
</template>
</table>代码如下：
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<script src="${pageContext.request.contextPath}/static/jquery-1.11.3.js"></script>
<script src="${pageContext.request.contextPath}/static/vue-2.2.6.js"></script>
<title></title>
</head>
<body>
<div id="app">
<table border="1" style="border-collapse:collapse">
<tr>
<th>城市序号</th>
<th>城市名称</th>
<th>所属城市代号</th>
</tr>
下面加入2个template 来执行指令 嵌套遍历
<template v-for="pro in cities">
<tr>
<th colspan="3">{{pro.provincialName}}</th>
</tr>
<template v-for="city in pro.cityList">
<tr>
<td>{{city.cityId}}</td>
<td>{{city.cityName}}</td>
<td>{{city.provincialId}}</td>
</tr>
</template>
</template>
</table>
</div>
</body>
<script>
new Vue({
el: '#app',
data: {
cities: ''
},
created: function () {
var $this = this;
var url = '/rycxApi/provincial/allPro';
$.get(url, function (data) {
console.log(data);
$this.cities = data;
})
}
});
</script>
</html>达到了下面的效果
