JS跨域：2.解决方案之-设置回调参数

来源：互联网发布：淘宝店铺导航代码大全编辑：程序博客网时间：2024/06/06 05:27

一服务器端代码

package com.cn;import java.util.List;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;@Controller@RequestMapping("/data/inteface")public class CSDNTest {    @RequestMapping("/getdata")    public void getSolrArticleen(String parameter,            HttpServletRequest request, HttpServletResponse response) throws Exception{        String callback = request.getParameter("jsoncallback");        parameter = new String(parameter.getBytes("iso-8859-1"), "utf-8");        //获取数据        DataRepository dataRepository = new DataRepository();        List<String> primaryItems = dataRepository.getData();        //把获取的数据转换成字符串，这里用的是FastJson,也可以根据需要用Gson        String jsonArticle = JSONObject.toJSONString(primaryItems,                SerializerFeature.DisableCircularReferenceDetect);        //把需要输出的服务器端的字符串拼接callback头             String json = callback+"(" + jsonArticle + ")";        //输出到客户端        GetOut.getWriter(json, response);    }}

二获取输出流的代码

package com.cn;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.http.HttpServletResponse;/** *  * @Title: GetOut.java * * @Package: com.cn * * @Company: WiiMedia * * @Description: 获取输出流 * * @author: SongJia * * @date: 2016-06-27 上午11:09:27 * */public  class GetOut {    public static PrintWriter getWriter(String msg,HttpServletResponse response) throws IOException{        response.setContentType("text/html;charset=utf-8");        PrintWriter out = null;        out = response.getWriter();        out.write(msg);        out.flush();        out.close();        return out;    }}

三客户端请求数据代码

<script type="text/javascript">    function AcquireData() {        $.ajax({               async:false,               url: "http://m.lecoonginfo.com/data/inteface/getdata,  // 跨域URL              type: 'GET',               dataType: 'jsonp',               jsonp: 'jsoncallback', //默认callback              timeout: 5000,                   success: function (json) {                 //客户端jquery预先定义好的callback函数，                 //成功获取跨域服务器上的json数据后，                 //会动态执行这个callback函数                   console.log(json);                }            }        });   </script>

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