Jsonp在spring MVC系统中的前后台交互源码实例

package g0623; /** * @author hbz 2014-6-23 */ import java.io.IOException; import java.io.PrintWriter; import java.util.Date; import java.util.HashMap; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import net.sf.json.JSONObject; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; @Controller @RequestMapping("/base") public class ExchangeJsonController { @RequestMapping("/jsonpp") ///base/json.do public void exchangeJson(HttpServletRequest request, HttpServletResponse response) { try { response.setContentType("text/plain; charset=utf-8"); response.setHeader("Pragma", "No-cache"); response.setHeader("Cache-Control", "no-cache"); response.setDateHeader("Expires", 0); Map<String, String> map = new HashMap<String, String>(); map.put("result", "content\\n \t 啦啦啦啦啦"); PrintWriter out = response.getWriter(); JSONObject resultJSON = JSONObject.fromObject(map); // 根据需要拼装json String jsonpCallback = request.getParameter("jsonpCallback");// 客户端请求参数 out.println(jsonpCallback + "(" + resultJSON.toString(1, 1) + ")");// 返回jsonp格式数据 System.out.println(new Date()); out.flush(); out.close(); } catch (IOException e) { e.printStackTrace(); } } }