$.ajax({ 
      type : "POST", 
      url : js_path + "/maintainAdd/add", 
      data : JSON.stringify(madd_data.editMaintain), 
      contentType : "application/json", 
      dataType : "json", 
      complete:function(msg) { 
        layer.msg("报修成功",{time:2000}); 
        layer.close(madd_data.w_c_index); 
      } 
    }); 

<span style="white-space:pre;"> </span>@ResponseBody 
  @RequestMapping(value = "/add",method = RequestMethod.POST) 
  public void addMaintain(@RequestBody Maintain maintain){ 
    this.save_maintain(maintain); 
  }