页面上一段时间内通过ajax轮询后台数据的简单实现方法

来源：互联网发布：淘宝怎么改好评为差评编辑：程序博客网时间：2024/05/16 01:06

var beginDate;
var loopMaxTime;

function doBegin(){
loopMaxTime = $("#loopMaxTime").val();

var value1 = $("#param1").val();
var value2 = $("#param2").val();

     $.ajax({
      type: "POST",
      url: contextPath + "/test1.do?t="+new Date(),
      dataType: "json",
      async: false,
      data: {"param1":value1,"param2":value2},
      success: function(data){
              if( data.SUCCESS ){
               beginDate = new Date();
            setTimeout("doQueryResult("+data.param3+")",10);
                }else{
                 alert(data.MSG);

               return ;
              }

      },
      error:function (XMLHttpRequest, textStatus, errorThrown) {
       alert(errorThrown);
      }
   });

}

function doQueryResult(param3)
{
           $.ajax({
        type: "POST",
        url: contextPath + "/test3.do?t="+new Date(),
        dataType: "json",
        async: false,
        data: {"param3":param3},
        success: function(RESULTDATA){

                if( RESULTDATA.SUCCESS ){
                   if(RESULTDATA.HASDATA)
                   {

                 //do submit
                   document.getElementById('submitBtn').submit();
                  //
                   }
                   else
                   {
                        var endDate = new Date();
                        if(endDate.getTime() - beginDate.getTime() > loopMaxTime)
                        {

                          alert("result is not done,time out.");
                        }else
                        {

                       setTimeout("doQueryResult("+RESULTDATA.param3+")",5000);

                        }

                   }

                }else{
                 alert(RESULTDATA.MSG);
               return ;
              }
        },
       error:function (XMLHttpRequest, textStatus, errorThrown) {
                 alert(errorThrown);
               }
     });