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服务器和前台采用JSON通讯

2015-10-18 17:57 190 查看
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:success
private 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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标签:  json通讯