浅谈JQuery+ajax+jsonp 跨域访问_

1、浅谈JQuery+ajax+jsonp 跨域访问_ Jsonp(JSON with Padding)是资料格式 json 的一种“用法模式”，可以让网页从别的网域猎取资料。 一. 客户端 !DOCTYPE html PUBLIC -/W3C/DTD HTML 4.01 Transitional/EN l4/loose.dtd html head meta http-equiv=Content-Type content=text/html; charset=UTF-8 titleInsert title here/title script type=text/javascript src=res

2、ource/js/jquery-1.7.2.js/script /head script type=text/javascript $(function() /* /简写形式，效果相同 $.getJSON(l 二. 服务器端 import java.io.IOException; import java.io.PrintWriter; import java.util.HashMap; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServlet

3、Response; import net.sf.json.JSONObject; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; Controller public class ExchangeJsonController RequestMapping(/base/json.do) public void exchangeJson(HttpServletRequest request,HttpServletRespon

4、se response) try response.setContentType(text/plain); response.setHeader(Pragma, No-cache); response.setHeader(Cache-Control, no-cache); response.setDateHeader(Expires, 0); MapString,String map = new HashMapString,String(); map.put(result, content); PrintWriter out = response.getWriter(); JSONObject resultJSON = JSONObject.fromObject(map); /依据需要拼装json String jsonpCallback = request.getParameter(jsonpCallback);/客户端恳求参数 out.println(jsonpCallback+(+resultJSON.toString(1,1)+);/返回jsonp格式数据 out.flush(); out.close(); catch (IOE