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446 lines
12 KiB
Markdown
446 lines
12 KiB
Markdown
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## vue-resource
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官网链接:
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- http相关:<https://github.com/pagekit/vue-resource/blob/master/docs/http.md>
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按照先后顺序,导入vue.js和vue-resource.js文件。
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### get 请求
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**格式**:
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```javascript
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this.$http.get(url)
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.then(function (response) {
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var data = response.body; //response.body是要获取的数据
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},
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function (err) {
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//err是异常数据
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});
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```
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获取到的`response.body`就是要获取的数据,但直接打印出来是 object,所以要记得转成string。
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**举例**:获取数据
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现规定,获取品牌数据的 api 接口说明如下:
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![](http://img.smyhvae.com/20180422_2140.png)
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```html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Document</title>
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<style>
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#app {
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width: 800px;
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margin: 20px auto;
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}
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#tb {
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width: 800px;
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border-collapse: collapse;
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margin: 20px auto;
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}
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#tb th {
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background-color: #0094ff;
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color: white;
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font-size: 16px;
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padding: 5px;
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text-align: center;
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border: 1px solid black;
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}
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#tb td {
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padding: 5px;
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text-align: center;
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border: 1px solid black;
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}
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</style>
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<script src="../vue.js"></script>
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<script src="../vue-resource121.js"></script>
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</head>
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<body>
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<div id="app">
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<input type="text" v-model="id">
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<input type="text" v-model="pname">
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<button>添加数据</button>
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<table id="tb">
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<tr>
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<th>编号</th>
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<th>名称</th>
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<th>创建时间</th>
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<th>操作</th>
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</tr>
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<tr v-for="item in list">
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<td>{{item.id}}</td>
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<td>{{item.name}}</td>
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<td>{{item.ctime}}</td>
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<td>
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<a href="javascript:void(0)">删除</a>
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</td>
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</tr>
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</table>
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</div>
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</body>
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<script>
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new Vue({
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el :'#app',
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data:{
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list:[]
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},
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// Vue对象实例创建成功以后就会自动调用这个方法
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created:function(){
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this.getlist();
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},
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methods:{
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getlist:function(){
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// 请求服务器的api获取到品牌的数据列表
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this.$http.get('http://vueapi.ittun.com/api/getprodlist')
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.then(function(response){
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// 1、处理服务器异常信息提示
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if(response.body.status != 0){
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alert(response.body.message);
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return;
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}
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// 2、处理正常的数据逻辑
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this.list = response.body.message; //直接将数据放到list数组当中,页面就会自动显示
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console.log(this.list);
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});
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}
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}
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});
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</script>
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</html>
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```
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上方代码中,我们用到了生命周期函数`created`,意思是:程序一加载,就马上在`created`这个函数里执行`getlist()`方法。
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运行的结果如下:
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![](http://img.smyhvae.com/20180422_2152.png)
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如果我直接在浏览器中输入请求的url,获取的json数据如下:(这种方式获取的是相同的数据)
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![](http://img.smyhvae.com/20180422_2150.png)
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### post请求
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**格式**:
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```javascript
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// 调用 $http.post(url, 传给服务器的请求体中的数据, {emulateJSON:true})
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this.$http.post(url, { name: '奔驰' }, { emulateJSON: true })
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.then(function (response) {
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alert(response.body.message);
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},
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function (error) {
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});
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```
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上方代码中,post()方法中有三个参数,其中第三个参数是固定值,照着写就可以了。
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**代码举例**:(添加数据)
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现规定,添加品牌数据的 api 接口说明如下:
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![](http://img.smyhvae.com/20180422_1720.png)
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代码如下:(在上一段代码的基础之上,添加代码)
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```html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Document</title>
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<style>
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#app {
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width: 800px;
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margin: 20px auto;
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}
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#tb {
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width: 800px;
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border-collapse: collapse;
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margin: 20px auto;
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}
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#tb th {
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background-color: #0094ff;
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color: white;
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font-size: 16px;
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padding: 5px;
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text-align: center;
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border: 1px solid black;
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}
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#tb td {
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padding: 5px;
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text-align: center;
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border: 1px solid black;
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}
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</style>
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<script src="vue.js"></script>
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<script src="vue-resource121.js"></script>
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</head>
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<body>
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<div id="app">
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<input type="text" v-model="pname">
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<button @click="adddata">添加数据</button>
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<table id="tb">
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<tr>
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<th>编号</th>
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<th>名称</th>
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<th>创建时间</th>
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<th>操作</th>
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</tr>
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<tr v-for="item in list">
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<td>{{item.id}}</td>
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<td>{{item.name}}</td>
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<td>{{item.ctime}}</td>
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<td>
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<a href="javascript:void(0)">删除</a>
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</td>
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</tr>
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</table>
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</div>
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</body>
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<script>
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new Vue({
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el: '#app',
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data: {
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pname: '', //这个 pname 是我在输入框里添加的数据。我们要把这个传给服务器
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list: []
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},
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// Vue对象实例创建成功以后就会自动调用这个方法
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created: function () {
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this.getlist();
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},
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methods: {
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//ajax请求:添加数据
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adddata: function () {
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// 1、获取用户填写的文本框的值只需要通过this.pname即可
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// 2、调用ajax的post方法将数据上传到服务器
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var url = 'http://vueapi.ittun.com/api/addproduct';
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var postData = { name: this.pname }; //【重要】键`name`是json中约定好的字段。我们把这个字段传给服务器
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var options = { emulateJSON: true };
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this.$http.post(url, postData, options).then(function (response) {
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if (response.body.status != 0) {
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alert(response.body.message);
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return;
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}
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this.pname = '';
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// 3、直接将列表数据重新加载一次,即可刷新页面上的数据
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this.getlist();
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});
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},
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//ajax请求:获取数据
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getlist: function () {
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this.$http.get('http://vueapi.ittun.com/api/getprodlist')
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.then(function (response) {
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// 1、处理服务器异常信息提示
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if (response.body.status != 0) {
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alert(response.body.message);
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return;
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}
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// 2、处理正常的数据逻辑
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this.list = response.body.message;
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console.log(this.list);
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});
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}
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}
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});
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</script>
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</html>
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```
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**代码举例**:(删除数据)
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```html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Document</title>
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<style>
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#app {
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width: 800px;
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margin: 20px auto;
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}
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#tb {
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width: 800px;
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border-collapse: collapse;
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margin: 20px auto;
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}
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#tb th {
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background-color: #0094ff;
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color: white;
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font-size: 16px;
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padding: 5px;
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text-align: center;
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border: 1px solid black;
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}
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#tb td {
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padding: 5px;
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text-align: center;
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border: 1px solid black;
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}
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</style>
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<script src="vue.js"></script>
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<script src="vue-resource121.js"></script>
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</head>
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<body>
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<div id="app">
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<input type="text" v-model="pname">
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<button @click="adddata">添加数据</button>
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<table id="tb">
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<tr>
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<th>编号</th>
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<th>名称</th>
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<th>创建时间</th>
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<th>操作</th>
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</tr>
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<tr v-for="item in list">
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<td>{{item.id}}</td>
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<td>{{item.name}}</td>
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<td>{{item.ctime}}</td>
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<td>
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<!-- 具体要删除哪个item,不能写死。所以要根据id来删 -->
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<a href="javascript:void(0)" @click="deldata(item.id)">删除</a>
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</td>
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</tr>
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</table>
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</div>
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</body>
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<script>
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new Vue({
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el: '#app',
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data: {
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pname: '', //这个 pname 是我在输入框里添加的数据。我们要把这个传给服务器
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list: []
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},
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// Vue对象实例创建成功以后就会自动调用这个方法
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created: function () {
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this.getlist();
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},
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methods: {
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//ajax请求:添加数据
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adddata: function () {
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// 1、获取用户填写的文本框的值只需要通过this.pname即可
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// 2、调用ajax的post方法将数据上传到服务器
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var url = 'http://vueapi.ittun.com/api/addproduct';
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var postData = { name: this.pname }; //【重要】键`name`是json中约定好的字段。我们把这个字段传给服务器
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var options = { emulateJSON: true };
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this.$http.post(url, postData, options).then(function (response) {
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if (response.body.status != 0) {
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alert(response.body.message);
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return;
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}
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this.pname = '';
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// 3、直接将列表数据重新加载一次,即可刷新页面上的数据
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this.getlist();
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});
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},
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//ajax请求:获取数据
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getlist: function () {
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this.$http.get('http://vueapi.ittun.com/api/getprodlist')
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.then(function (response) {
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// 1、处理服务器异常信息提示
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if (response.body.status != 0) {
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alert(response.body.message);
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return;
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}
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// 2、处理正常的数据逻辑
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this.list = response.body.message;
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console.log(this.list);
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});
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},
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// ajax请求:删除数据
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deldata: function (id) {
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this.$http.get('http://vueapi.ittun.com/api/delproduct/' + id)
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.then(function (response) {
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if (response.body.status != 0) {
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alert(response.body.message);
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return;
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}
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// 刷新列表
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this.getlist();
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});
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}
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}
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});
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</script>
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</html>
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```
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### jsonp
|
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![](http://img.smyhvae.com/20180420_2250.png)
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```javascript
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// 利用vue-resource中的jsonp方法实现跨域请求数据,这里要注意的是:
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// url后面不需要跟callback=fn这个参数了,jsonp方法会自动加上
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this.$http.jsonp('http://vuecms.ittun.com/api/getlunbo?id=1')
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.then(function (response) {
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console.log(JSON.stringify(response.body));
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}, function (err) {
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//err是异常数据
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});
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```
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请求结果:
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![](http://img.smyhvae.com/20180420_2256.png)
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