学习使用 vue 的时候遇到问题，解决方案如下：
<%--
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--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>test_vue_element</title>
<meta charset="UTF-8">
<!-- 引入样式 -->
<link rel="stylesheet" href="../node_modules/element-ui/lib/theme-chalk/index.css">
<script type="text/javascript" src="../js/jquery-1.11.1.min.js"></script>
</head>
<body>
<div id="app">
<el-card style="margin-left: 4%;margin-right: 4%">
<div>
<el-input placeholder="请输入内容" v-model="input3">
<template slot="prepend">Http://</template>
</el-input>
</div>
<div style="margin-top: 15px;">
<el-input placeholder="请输入内容" v-model="input4">
<template slot="append">.com</template>
</el-input>
</div>
<div style="margin-top: 15px;">
<el-input placeholder="请输入内容" v-model="input5" class="input-with-select">
<el-select v-model="select" slot="prepend" placeholder="请选择">
<el-option v-for="item in selectOptions"
:key="item.id"
:label="item.userName"
:value="item.id"
></el-option>
</el-select>
<el-button slot="append" icon="el-icon-search"></el-button>
</el-input>
<el-select v-model="test" placeholder="选择">
<el-option
v-for="item in selectOptions"
:key="item.id"
:label="item.userName"
:value="item.id">
</el-option>
</el-select>
<span >{{test_jiajia}}</span>
</div>
</el-card>
</div>
</body>
</html>
<!-- import Vue before Element -->
<script src="../node_modules/vue/dist/vue.js"></script>
<!-- import JavaScript -->
<script src="../node_modules/element-ui/lib/index.js"></script>
<script src="../node_modules/axios/dist/axios.min.js"></script>
<script>
new Vue({
el:'#app',
data: {
input3: '',
input4: '',
input5: '',
select: '',
test:'',
test_jiajia:1,
selectOptions:[{
id:'0',
userName:'0',
userId:'0'
}]
},
mounted(){
this.getSelectOptions()
},
methods:{
getSelectOptions:function(){
var vm = this; // 这里原本未定义，this作用域问题，导致未能动态刷新
/* this.test_jiajia++;
let temp = null;
$.ajax({
url: "/test",
type: "get",
dateType: "json",
success(result) {
console.log(result.length);
//this.selectOptions = result;
//temp=result;
//console.log(temp[0].id)
}
});
this.selectOptions=temp;
console.log(this.selectOptions[0].id)*/
axios.get('${pageContext.request.contextPath}/test')
.then(function (response){
vm.selectOptions=response.data;
console.log(vm.selectOptions[0].id);
console.log(response);
}).catch(function(error){
console.log(error);
})
}
}
})
</script>
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