封装实体类（服务器返回信息都存放在该实体中）

package com.chinaseacom.store.common;public class ResponseBody {public static final int CODE_SUCCESS=1;public static final int CODE_FAIL=0;private int code=1;   //0:failtrue; 1:successprivate String message; //private String errors;private String accessToken;private Object result;public ResponseBody(int code, String message, String errors, Object result, String accessToken) {super();this.code = code;this.message = message;this.errors = errors;this.result = result;this.accessToken = accessToken;}public String getAccessToken() {return accessToken;}public void setAccessToken(String accessToken) {this.accessToken = accessToken;}/*** @return the code*/public int getCode() {return code;}/*** @param code the code to set*/public void setCode(int code) {this.code = code;}/*** @return the message*/public String getMessage() {return message;}/*** @param message the message to set*/public void setMessage(String message) {this.message = message;}/*** @return the errors*/public String getErrors() {return errors;}/*** @param errors the errors to set*/public void setErrors(String errors) {this.errors = errors;}/*** @return the result*/public Object getResult() {return result;}/*** @param result the result to set*/public void setResult(Object result) {this.result = result;}}

服务器返回json字符串

  protected void writeResponseByJsonStr(Object javabean,int code, String message, String error){try {HttpServletResponse response= getResponse();response.setContentType("application/json; charset=utf-8");response.setHeader("Cache-Control", "no-cache"); //取消浏览器缓存PrintWriter out = response.getWriter();out.print(JSON.toJSONString(new ResponseBody(code,message,error,javabean,accessToken)  ));//实体对象转换为json字符串传递out.flush();out.close();} catch (IOException e) {e.printStackTrace();}}

前台解析json字符串（采用fastjson)步骤

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.List;import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;import com.chinaseacom.store.customer.model.Notice;public class MobileClient {public static void main(String[] args) throws IOException {BufferedReader reader = null;try {URL url = new URL("http://localhost:8080/customer/notice/list");reader = new BufferedReader(new InputStreamReader(url.openStream()));String jsonString = reader.readLine();System.out.println(jsonString);JSONObject jsonObject = JSON.parseObject(jsonString); // 得到json对象JSONArray jsonArray = (JSONArray) jsonObject.get("result");// 根据key得到json数组System.out.println(jsonArray.toJSONString());List<Notice> nlist = JSON.parseArray(jsonArray.toJSONString(),Notice.class); // json数组转换成对象集合for (Notice notice : nlist) {System.out.println(notice.getUpdateDate());}} catch (Exception e) {e.printStackTrace();} finally {reader.close();}}}

参考文章：使用FastJSON，将对象或数组和JSON串互转

http://blog.csdn.net/gaojinshan/article/details/30260707

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