springMVC实现jsonp的跨域请求

1.在Controller层实现jsonp接口

/**
 *Project Name: gspReceiveServer
 *File Name:    EquipmentController.java
 *Package Name: com.ltmap.platform.equipment.controller
 *Date:         2016年8月3日 上午9:46:35
 *Copyright (c) 2016,[e-mail] All Rights Reserved.
*/

package com.ltmap.platform.equipment.controller;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import com.ltmap.platform.equipment.service.EquipmentService;

/**
 *Title:      EquipmentController<br/>
 *Description:
 *@Company:   青岛励图高科<br/>
 *@author:    刘云生
 *@version:   v1.0
 *@since:     JDK 1.7.0_80
 *@Date:      2016年8月3日 上午9:46:35 <br/>
*/
@Controller
public class EquipmentController {
@Autowired
EquipmentService equipmentService;
@RequestMapping(value = "updateEquipment", method ={RequestMethod.POST,RequestMethod.GET}, produces = "application/json; charset=utf-8")
@ResponseBody
public int updateEquipment(){
return equipmentService.updateEquipment();
}
@RequestMapping("updateEquipmentJsonp")  
 public void get(HttpServletRequest request,HttpServletResponse response) {  
int flag=equipmentService.updateEquipment();
response.setContentType("text/plain");  
     String callbackFunName =request.getParameter("<span style="color:#ff6666;">callbackparam</span>");//得到js函数名称  
     try {  
     response.getWriter().write(callbackFunName + "([ { flag:\""+flag+"\"}])"); //返回jsonp数据  
     } catch (IOException e) {  
         e.printStackTrace();  
     }  
 }  
}

2.利用ajax进行jsonp的跨域请求

$.ajax({  
                     url: jsonpUrl,
                     type: 'POST',  
                     dataType: 'jsonp',  
                     jsonp: '<span style="color:#ff0000;">callbackparam</span>',  
                     jsonpCallback:'jsonpCallback',  
                     success: function(json){  
                     console.log("请求路径："+jsonpUrl+"返回结果："+json);
                     console.log(json);
                     },  
                     error: function(){  
                        // alert('fail');  
                     }  
                 });  

3.注意：红字参数名称要保持一致