vue实战(一):利用vue与ajax实现增删改查：
<%@ page pageEncoding="UTF-8" language="java" %>
<%@ include file="../commons/taglib.jsp" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="zh-CN">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<meta name="renderer" content="webkit">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
<meta http-equiv="Expires" content="0">
<meta http-equiv="Cache-Control" content="no-cache"> <link rel="stylesheet" href="${ctxStatic}/css/bootstrap.min.css">
<script type="text/javascript" src="${ctxStatic}/js/jquery.min.js"></script>
<script type="text/javascript" src="${ctxStatic}/js/bootstrap.min.js"></script>
<script type="text/javascript" src="${ctxStatic}/js/common.js"></script>
<script type="text/javascript" src="${ctx}/static/js/vue.js"></script>
<script type="text/javascript">
var getUrl='${ctx}/distributor/getRate';
var saveUrl= '${ctx}/distributor/saveRate';
var rate = [];
var vm ;
var rates ='';
$.ajax({
url : getUrl,
async : false,
dataType: 'json',
success: function(data2){
rate = data2;
}
});
console.log(rate);
$(function(){
vm = new Vue({
el: "#app",
data: {
rates : rate,
newRate:{
startMoney:'',
endMoney:'',
rate:''
},
myShow:false
} ,
methods: {
saveRate: function(){
rates = JSON.stringify(this.rates);
console.log(rates);
$.ajax({
url: saveUrl,
dataType: 'json',
type: 'post',
data:{
rate:rates
},
success:function(data){
console.log(data)
},
error:function(err){
console.log(err)
}
})
},
delRate: function(e){
var that = e.currentTarget;
console.log(e.currentTarget);
delId = that.id
this.rates.splice(delId,1);
},
addRate: function() {
this.myShow =true;
console.log(this.rates);
},
sureRate :function() {
this.myShow = false; //隐藏输入框
rates = this.rates;
newRate = this.newRate;
var newStartMoney = parseInt(newRate.startMoney); //输入的开始金额
var newEndMoney = parseInt(newRate.endMoney);// 输入的结束金额
var new_rate = parseInt(newRate.rate); // 输入的返佣比例
if(rates.length == 0){ //当一行数据都没有的时候
if(newStartMoney > newEndMoney){
alert("输入的startmoney必须小于endMoney");
return false;
}else if(new_rate <= 0 || new_rate >1){
alert("返佣比例必须在0到1之间")
return false;
}else{
var newRate2 ={
startMoney: newRate.startMoney,
endMoney: newRate.endMoney,
rate: newRate.rate
}
rates.push(newRate2);
}
}else{ //有数据的时候
var beforeEndMoney = parseInt(rates[rates.length-1].endMoney); //前一项的结束金额
if(newStartMoney < beforeEndMoney){
alert("开始金额必须大于等于前一项的结束金额");
return false;
}else if(newStartMoney > newEndMoney){
alert("开始金额必须小于结束金额");
return false;
}else if(new_rate <= 0 || new_rate >1){
alert("返佣比例必须在0到1之间")
return false;
}
else{
var newRate2 ={ //定义一个新的对象赋值,如果直接写 newRate2 = newRate的话，newRate2 其实只是一个相当于指针的东西,只是指向了newRate的值，如果newRate的值改变了，newRate2也会改变。
startMoney: newRate.startMoney,
endMoney: newRate.endMoney,
rate: newRate.rate
}
rates.push(newRate2);
} }
// 将输入框对象的值都设置为空,为下一次输入作准备
this.newRate.startMoney = '';
this.newRate.endMoney = '';
this.newRate.rate = '';
}
} });
});
</script> <style> </style>
<body id="app">
<table>
<thead>
<tr>
<th colspan="3">订单金额区间(元)</th><th colspan="1">返佣比例(%)</th><th>操作</th>
</tr>
</thead>
<tbody>
<tr v-for="rate in rates">
<td>{{rate.startMoney}}</td>
<td>~</td>
<td>{{rate.endMoney}}</td>
<td>{{rate.rate}}</td>
<td><button @click = "delRate" id="{{$index}}">删除</button></td> <!-- 这里的index索引方法要注意 -->
</tr>
<tr v-show="myShow">
<td><input type="text" v-model="newRate.startMoney"></td>
<td>~</td>
<td><input type="text" v-model="newRate.endMoney"></td>
<td><input type="text" v-model="newRate.rate"></td>
<td><button @click = "sureRate">确定</button></td>
</tr>
</tbody>
</table>
<button @click="addRate">新增</button> <button @click="saveRate">保存</button>
</body>
</html>
本次项目的注意点:
1:ajax 的使用不熟练
2:删除方法，可以使用索引，为每一行设置一个id属性值，然后删除总数据id属性值的那个项。
3：在新增项中，要注意js中，例如a=b中 "=" 其实相当于一个指针，当b的值变化时，a也会改变(a其实并没有值)，这个时候我们要将a的具体属性值都要设置才行。