详解vue-Resource（与后端数据交互）

时间:2020-05-15 艺小晨人气:0

单来说，vue-resource就像jQuery里的$.ajax，用来和后端交互数据的。可以放在created或者ready里面运行来获取或者更新数据...

vue-resource文档：https://github.com/vuejs/vue-resource/blob/masterhttps://img.qb5200.com/download-x/docs/http.md

结合vue-router

data(){
    return{
      toplist:[],
      alllist:[]
    }
  },
  //vue-router
  route:{
    data({to}){
      //并发请求，利用 Promise 
      return Promise.all([
        //简写
        this.$http.get('http://192.168.30.235:9999/rest/knowledge/list',{'websiteId':2,'pageSize':5,'pageNo':1,'isTop':1}),
        //this.$http.get('http://192.168.30.235:9999/rest/knowledge/list',{'websiteId':2,'pageSize':20,'pageNo':1,'isTop':0})
        //不简写
        this.$http({
          method:'GET',
          url:'http://192.168.30.235:9999/rest/knowledge/list',
          data:{'websiteId':2,'pageSize':20,'pageNo':1,'isTop':0},
          headers: {"X-Requested-With": "XMLHttpRequest"},
          emulateJSON: true
          })
        ]).then(function(data){//es5写法
           return{
            toplist:data[0].data.knowledgeList,
            alllist:data[1].data.knowledgeList
          }
        //es6写法 .then()部分
        //.then(([toplist,alllist])=>({toplist,alllist})) 
      },function(error){
        //error
      })
    }
  }

在其他地方使用

ready(){
    var that=this;
    var websiteid = 2,
      pagesize = 20,
      pageno =1; 
    that.$http({
      method:'GET',
      url:'http://192.168.30.235:9999/rest/knowledge/list',
      data:{'websiteId':websiteid,'pageSize':pagesize,'pageNo':pageno,'isTop':0}
    }).then(function(data){
      //赋值给alllist数组,
      that.$set('alllist',data.data.knowledgeList)
    })
    //简写
    /*that.$http.get('http://192.168.30.235:9999/knowledge/list',{'websiteId':2,'pageSize':20,'pageNo':1,'isTop':0}).then(function(response){
      that.$set('alllist',response.data.knowledgeList)
    })*/
  }

若定义全部变量（在data（）中定义），使用$get()获取

data(){
    return{
      toplist:[],
      alllist:[],
      websiteid:2,
      pagesize:20,
      pageno:1
    }
  },
ready(){
    var that=this;
    that.$http({
      method:'GET',
      url:'http://192.168.30.235:9999/rest/knowledge/list',
      //使用定义的全局变量 用$get()获取
      data:{'websiteId':that.$get('websiteid'),'pageSize':that.$get('pagesize'),'pageNo':that.$get('pageno'),'isTop':0}
    }).then(function(data){
      //赋值给alllist数组,
      that.$set('alllist',data.data.knowledgeList)
    },function(error){
      //error
     })
  }

post方式同理

将数据绑定到dom上

<ul>
  <li v-for="item in alllist" v-if="item.istop == false">
    <a v-link="{ name: 'getReceiptDetail',params:{knowledgeId: item.id }}">
      <div class='fl know-info'>
　　　　　　　　　　<!-- | limit 和 | timer是filter 在后续会说到-->
　　　　　　　　　　<!--字段含义: -->
        <p class='font-normal nomal-height'>{{item.title | limit 30 }}</p>         
　　　　　　　　　 <p class='co9a9a9a' ><span style='margin-right: 1rem;'>{{item.viewTimes}}K</span><span>{{item.publishTime | timer }}</span></p> <!--viewTimes:有多少人查看 , publishTime:发布时间-->
      </div>
      <div class='fr know-img'>
        <img v-bind:src=item.coverImage />
      </div>
      <div class='clearfix'></div>
    </a>
  </li>
</ul>

在vue-validator中做post示例 , 将接口请求地址定义为全局详见VUEX

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