ajax 请求方式

1.如果后台接收参数中使用 

@RequestBody
那么

$.ajax({
   url:CONTEXT_PATH+"/lotPlatform/getLastState",
   type: "post",
   contentType:'application/json',
   dataType: "json",
   traditional:true,
   data:JSON.stringify({'deviceName':'hangtian2'}),
   success:function(data){
      console.log(data);
   }
})
2、如果没有

$.ajax({
   url:CONTEXT_PATH+"/lotPlatform/getLastState",
   type: "post",
   contentType: "application/x-www-form-urlencoded",
   dataType: "json",
   traditional:true,
   data:{deviceName:'hangtian2'},
   success:function(data){
      console.log(data);
   }
})