java 接口请求返回通用json

public class BaseResponseBody {
// 不能添加属性 仅做泛型使用
}

public class ResponseBase<T extends BaseResponseBody> { private Integer msgCode ;
private String msgString;
private long serverTime;
private T body; public ResponseBase(){
super();
this.msgCode = Integer.parseInt(MsgConstants.RESULT_200[0]);
this.msgString = MsgConstants.RESULT_200[1];
this.serverTime = System.currentTimeMillis();
} public ResponseBase(T body){
this();
this.body = body;
} public ResponseBase(String msgCode, String msgString){
super();
if(NumberUtils.isDigits(msgCode)){
this.msgCode = Integer.parseInt(msgCode);
}else{
this.msgCode = Integer.parseInt(MsgConstants.RESULT_502[0]);
}
this.msgString = msgString;
this.serverTime = System.currentTimeMillis();
} public Integer getMsgCode() {
return msgCode;
} public String getMsgString() {
return msgString;
} public long getServerTime() {
return serverTime;
} public T getBody() {
return body;
} public void setMsgCode(Integer msgCode) {
this.msgCode = msgCode;
} public void setMsgString(String msgString) {
this.msgString = msgString;
} public void setServerTime(long serverTime) {
this.serverTime = serverTime;
} public void setBody(T body) {
this.body = body;
}
}

public class MsgConstants {/******************** 平台调用返回失败返回代码和异常描述 ***********************/
public final static String[] RESULT_200 = { "200", "SUCCESS" };
}

@RequestMapping(value = "/contlistAES", method = RequestMethod.POST)
@ResponseBody
public void contlistAES(HttpServletRequest req, HttpServletResponse rsp) {
ContactListRequest request = null;
ResponseBase<SubNodesResp> response = null;
try {
// 解析请求参数并解密
String jsonParams=AppInterFaceUtil.getInputStreamParameter(req);
request = JSON.parseObject(jsonParams, ContactListRequest.class);
if (null==request) {
throw new BaseException(MsgConstants.RESULT_403[0], MsgConstants.RESULT_403[1]);
}
response = new ResponseBase<SubNodesResp>();
//查询数据
SubNodesResp info = departmentService.getChildFromClient(request.getDeptId(),request.getTs());
response.setBody(info);
} catch (BaseException e) {
response = new ResponseBase<SubNodesResp>(e.getCode(), e.getMessage());
} catch (Exception e) {
if (StringUtils.isBlank(e.getMessage())) {
response = new ResponseBase<SubNodesResp>(MsgConstants.RESULT_502[0], MsgConstants.RESULT_502[1]);
} else {
response = new ResponseBase<SubNodesResp>(MsgConstants.RESULT_502[0], e.getMessage());
}
e.printStackTrace();
}
//返回数据
String data = JSON.toJSONString(response, SerializerFeature.WriteMapNullValue);
AjaxUtil.writeClient(data, req, rsp);
}

public class AjaxUtil {
private static Logger logger = LoggerFactory.getLogger(AjaxUtil.class);
/**
* ajax 请求返回的数据
* @param data
* @param req
* @param resp
*/
public static void sendMessage(String data,HttpServletResponse resp){
PrintWriter printWriter = null;
try {
printWriter = resp.getWriter();
printWriter.print(data);
} catch (IOException ex) {
logger.error("Ajax send "+ data + " , Exception :" + ex);
} finally {
if (null != printWriter) {
printWriter.flush();
printWriter.close();
}
}
}/**
* 封装easyui表格数据
* @param list 列表数据
* @param total 页数
* @return
*/
public static Map<String, Object> getPageListDate(List<?> list,int total){
if (list != null) {
Map<String, Object> result = new HashMap<String, Object>();
result.put("total", total);
result.put("rows", list);
return result;// 这个就是你在ajax成功的时候返回的数据，我在那边进行了一个对象封装
}
return null;
}/**
* ajax 请求返回的数据
* @param data
* @param req
* @param resp
*/
public static void writeMessage(String data,HttpServletResponse resp){
resp.setHeader("Cache-Control", "no-cache");
resp.setContentType("text/json;charset=UTF-8");
resp.setCharacterEncoding("UTF-8");
PrintWriter printWriter = null;
try {
printWriter = resp.getWriter();
printWriter.write(data);
} catch (IOException ex) {
logger.error("Ajax send "+ data + " , Exception :" + ex);
} finally {
if (null != printWriter) {
printWriter.flush();
printWriter.close();
}
}
}/**
* ajax 请求返回的数据
* @param data
* @param req
* @param resp
*/
public static void writeClient(String data,HttpServletRequest request,HttpServletResponse response){PrintWriter printWriter = null;
try {if(request.getRequestURI().endsWith("AES")){
data = AESUtil.encrypt(data);
}response.setHeader("Cache-Control", "no-cache");
response.setContentType("text/json;charset=UTF-8");
response.setCharacterEncoding("UTF-8");
printWriter = response.getWriter();
printWriter.write(data);} catch (IOException ex) {
logger.error("Ajax send "+ data + " , Exception :" + ex);
} finally {
if (null != printWriter) {
//printWriter.flush();
//printWriter.close();
}
}
}
}