美文网首页
vue.js学习笔记(二):利用vue与ajax简单实现增删改查

vue.js学习笔记(二):利用vue与ajax简单实现增删改查

作者: AlbenXie | 来源:发表于2017-10-13 14:54 被阅读297次
<%@ 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。

相关文章

网友评论

      本文标题:vue.js学习笔记(二):利用vue与ajax简单实现增删改查

      本文链接:https://www.haomeiwen.com/subject/gppzyxtx.html