完善状态码

license/src/main/java/iot/sixiang/license/consts/ResultCode.java

+package iot.sixiang.license.consts;
+
+/**
+ * Created by m33 on 2022/6/15 9:43
+ */
+public enum ResultCode  {
+    SUCCESS(200, "操作成功"),
+    SERVER_EXCEPTION(400, "服务异常"),
+    UNAUTHORIZED(401, "暂未登录或token已经过期"),
+    VALIDATE_FAILED(402, "参数检验失败"),
+    FAILED(403, "操作失败");
+    private long code;
+    private String msg;
+
+    private ResultCode(long code, String msg) {
+        this.code = code;
+        this.msg = msg;
+    }
+
+    public long getCode() {
+        return code;
+    }
+
+    public String getMsg() {
+        return msg;
+    }
+}

license/src/main/java/iot/sixiang/license/controller/ApplyController.java

@@ -58,7 +58,7 @@ public class ApplyController {
         if (res) {
             return BaseResult.success();
         } else {
-            return BaseResult.fail();
+            return BaseResult.failed();
         }
     }
 

license/src/main/java/iot/sixiang/license/controller/DeviceController.java

@@ -57,7 +57,7 @@ public class DeviceController {
         if (res) {
             return BaseResult.success();
         } else {
-            return BaseResult.fail();
+            return BaseResult.failed();
         }
     }
 

license/src/main/java/iot/sixiang/license/controller/LoginController.java

@@ -60,7 +60,7 @@ public class LoginController {
                 return ResResult.success().record(loginVo);
             }
         }
-        return ResResult.fail().msg("用户名或密码错误");
+        return ResResult.failed().msg("用户名或密码错误");
     }
 
     @ApiOperation(value = "注销接口", notes = "注销接口")
@@ -72,7 +72,7 @@ public class LoginController {
 
     @GetMapping("fail")
     @ApiIgnore
-    public ResResult fail(HttpServletRequest request) {
-        return ResResult.fail().msg(request.getAttribute("msg").toString());
+    public BaseResult fail(HttpServletRequest request) {
+        return BaseResult.unauthorized();
     }
 }

license/src/main/java/iot/sixiang/license/controller/OperateController.java

@@ -107,7 +107,7 @@ public class OperateController {
         if (res) {
             return BaseResult.success();
         } else {
-            return BaseResult.fail();
+            return BaseResult.failed();
         }
     }
 
@@ -148,7 +148,7 @@ public class OperateController {
         if (res) {
             return BaseResult.success();
         } else {
-            return BaseResult.fail();
+            return BaseResult.failed();
         }
     }
 
@@ -165,7 +165,7 @@ public class OperateController {
         if (res) {
             return BaseResult.success();
         } else {
-            return BaseResult.fail();
+            return BaseResult.failed();
         }
     }
 
@@ -188,7 +188,7 @@ public class OperateController {
         if (res) {
             return BaseResult.success();
         } else {
-            return BaseResult.fail();
+            return BaseResult.failed();
         }
     }
 

license/src/main/java/iot/sixiang/license/controller/UserController.java

@@ -58,7 +58,7 @@ public class UserController {
         if (res) {
             return BaseResult.success();
         } else {
-            return BaseResult.fail();
+            return BaseResult.failed();
         }
     }
 
@@ -75,7 +75,7 @@ public class UserController {
         if (res) {
             return BaseResult.success();
         } else {
-            return BaseResult.fail();
+            return BaseResult.failed();
         }
     }
 
@@ -98,7 +98,7 @@ public class UserController {
         if (res) {
             return BaseResult.success();
         } else {
-            return BaseResult.fail();
+            return BaseResult.failed();
         }
     }
 

license/src/main/java/iot/sixiang/license/handler/GlobalExceptionHandler.java

@@ -16,7 +16,7 @@ public class GlobalExceptionHandler {
     @ResponseBody    //为了返回数据
     public BaseResult error(Exception e){
         e.printStackTrace();
-        return BaseResult.fail().msg("执行了全局的异常类...");
+        return BaseResult.serverException();
     }
 
     //自定义异常
@@ -24,6 +24,6 @@ public class GlobalExceptionHandler {
     @ResponseBody//为了返回数据
     public BaseResult error(IotLicenseException e){
         e.printStackTrace();
-        return BaseResult.fail().msg(e.getMsg()).code(e.getCode());
+        return BaseResult.failed().msg(e.getMsg()).code(e.getCode());
     }
 }

license/src/main/java/iot/sixiang/license/handler/IotLicenseException.java

@@ -12,7 +12,7 @@ import lombok.NoArgsConstructor;
 @NoArgsConstructor  //生成无参构造
 public class IotLicenseException extends RuntimeException {
 
-    private Integer code;
+    private long code;
 
     private String msg;//异常信息
 }

license/src/main/java/iot/sixiang/license/model/BaseResult.java

 package iot.sixiang.license.model;
 
+import iot.sixiang.license.consts.ResultCode;
+
 //@Data
 public class BaseResult {
-	private int code;
+	private long code;
 	private String msg;
 
-	public BaseResult(int code, String reason) {
+	public BaseResult(long code, String msg) {
 		super();
 		this.code = code;
-		this.msg = reason;
+		this.msg = msg;
 	}
 
 	public BaseResult() {
@@ -16,21 +18,53 @@ public class BaseResult {
 		// TODO Auto-generated constructor stub
 	}
 
+	/**
+	 * code = 200
+	 * msg = 操作成功
+	 * @return
+	 */
 	public static BaseResult success() {
-		BaseResult respResult = new BaseResult();
-		respResult.setCode(200);
-		respResult.setMsg("success");
-		return respResult;
+		return new BaseResult(ResultCode.SUCCESS.getCode(),ResultCode.SUCCESS.getMsg());
 	}
 
-	public static BaseResult fail() {
-		BaseResult respResult = new BaseResult();
-		respResult.setCode(400);
-		respResult.setMsg("fail");
-		return respResult;
+	/**
+	 * code = 400
+	 * msg = 服务异常
+	 * @return
+	 */
+	public static BaseResult serverException() {
+		return new BaseResult(ResultCode.SERVER_EXCEPTION.getCode(),ResultCode.SERVER_EXCEPTION.getMsg());
+	}
+
+	/**
+	 * code = 401
+	 * msg = 暂未登录或token已经过期
+	 * @return
+	 */
+	public static BaseResult unauthorized() {
+		return new BaseResult(ResultCode.UNAUTHORIZED.getCode(),ResultCode.UNAUTHORIZED.getMsg());
+	}
+
+	/**
+	 * code = 402
+	 * msg = 参数校验失败
+	 * @return
+	 */
+	public static BaseResult validate_failed() {
+		return new BaseResult(ResultCode.VALIDATE_FAILED.getCode(),ResultCode.VALIDATE_FAILED.getMsg());
+	}
+
+	/**
+	 * code = 403
+	 * msg = 操作失败（数据库增删改查等失败）
+	 * @return
+	 */
+	public static BaseResult failed() {
+		return new BaseResult(ResultCode.SUCCESS.getCode(),ResultCode.SUCCESS.getMsg());
+
 	}
 
-	public BaseResult code(int code) {
+	public BaseResult code(long code) {
 		this.code = code;
 		return this;
 	}
@@ -41,11 +75,11 @@ public class BaseResult {
 		return this;
 	}
 
-	public int getCode() {
+	public long getCode() {
 		return code;
 	}
 
-	public void setCode(int code) {
+	public void setCode(long code) {
 		this.code = code;
 	}
 

license/src/main/java/iot/sixiang/license/model/PageResult.java

@@ -24,6 +24,7 @@ public class PageResult<T> {
         this.record = record;
     }
 
+
     public PageResult() {
         super();
         // TODO Auto-generated constructor stub

license/src/main/java/iot/sixiang/license/model/ResResult.java

 package iot.sixiang.license.model;
 
+import iot.sixiang.license.consts.ResultCode;
 import lombok.Data;
 
 /**
@@ -12,25 +13,63 @@ import lombok.Data;
  */
 @Data
 public class ResResult<T> {
-    private int code;
+    private long code;
     private String msg;
     private T record;
 
+    public ResResult(long code, String msg) {
+        super();
+        this.code = code;
+        this.msg = msg;
+    }
+
+    /**
+     * code = 200
+     * msg = 操作成功
+     * @return
+     */
     public static ResResult success() {
-        ResResult respResult = new ResResult();
-        respResult.setCode(200);
-        respResult.setMsg("success");
-        return respResult;
+        return new ResResult(ResultCode.SUCCESS.getCode(),ResultCode.SUCCESS.getMsg());
     }
 
-    public static ResResult fail() {
-        ResResult respResult = new ResResult();
-        respResult.setCode(400);
-        respResult.setMsg("fail");
-        return respResult;
+    /**
+     * code = 400
+     * msg = 服务异常
+     * @return
+     */
+    public static ResResult serverException() {
+        return new ResResult(ResultCode.SERVER_EXCEPTION.getCode(),ResultCode.SERVER_EXCEPTION.getMsg());
+    }
+
+    /**
+     * code = 401
+     * msg = 暂未登录或token已经过期
+     * @return
+     */
+    public static ResResult unauthorized() {
+        return new ResResult(ResultCode.UNAUTHORIZED.getCode(),ResultCode.UNAUTHORIZED.getMsg());
+    }
+
+    /**
+     * code = 402
+     * msg = 参数校验失败
+     * @return
+     */
+    public static ResResult validate_failed() {
+        return new ResResult(ResultCode.VALIDATE_FAILED.getCode(),ResultCode.VALIDATE_FAILED.getMsg());
+    }
+
+    /**
+     * code = 403
+     * msg = 操作失败（数据库增删改查等失败）
+     * @return
+     */
+    public static ResResult failed() {
+        return new ResResult(ResultCode.SUCCESS.getCode(),ResultCode.SUCCESS.getMsg());
+
     }
 
-    public ResResult code(int code) {
+    public ResResult code(long code) {
         this.code = code;
         return this;
     }

license/src/main/java/iot/sixiang/license/service/impl/AlarmReadServiceImpl.java

 package iot.sixiang.license.service.impl;
 
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import iot.sixiang.license.consts.ResultCode;
 import iot.sixiang.license.entity.AlarmRead;
 import iot.sixiang.license.handler.IotLicenseException;
 import iot.sixiang.license.mapper.AlarmMapper;
@@ -31,7 +32,7 @@ public class AlarmReadServiceImpl extends ServiceImpl<AlarmReadMapper, AlarmRead
     @Override
     public boolean readAlarm(int userId) {
         if (userId == 0) {
-            throw new IotLicenseException(400, "用户Id不能为空");
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(),ResultCode.VALIDATE_FAILED.getMsg());
         }
         List<AlarmVo> alarmList = alarmMapper.getAlarmList(userId);
         for (AlarmVo alarm: alarmList) {

license/src/main/java/iot/sixiang/license/service/impl/AlarmServiceImpl.java

 package iot.sixiang.license.service.impl;
 
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import iot.sixiang.license.consts.ResultCode;
 import iot.sixiang.license.entity.Alarm;
 import iot.sixiang.license.handler.IotLicenseException;
 import iot.sixiang.license.mapper.AlarmMapper;
@@ -24,7 +25,7 @@ public class AlarmServiceImpl extends ServiceImpl<AlarmMapper, Alarm> implements
     @Override
     public List<AlarmVo> getAlarmList(int userId) {
         if (userId == 0) {
-            throw new IotLicenseException(400, "用户Id不能为空");
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(),ResultCode.VALIDATE_FAILED.getMsg());
         }
         return alarmMapper.getAlarmList(userId);
     }

license/src/main/java/iot/sixiang/license/service/impl/ApplyServiceImpl.java

@@ -2,6 +2,7 @@ package iot.sixiang.license.service.impl;
 
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import iot.sixiang.license.auth.AuthManager;
+import iot.sixiang.license.consts.ResultCode;
 import iot.sixiang.license.entity.Apply;
 import iot.sixiang.license.handler.IotLicenseException;
 import iot.sixiang.license.mapper.ApplyMapper;
@@ -33,18 +34,13 @@ public class ApplyServiceImpl extends ServiceImpl<ApplyMapper, Apply> implements
     ApplyMapper applyMapper;
     @Override
     public boolean addApply(String appName, String appKey, int userId) {
-        if(StringUtils.isEmpty(appName)) {
-            throw new IotLicenseException(400,"应用名不能为空");
-        }
-        if(StringUtils.isEmpty(appKey)) {
-            throw new IotLicenseException(400,"应用key不能为空");
-        }
-        if(userId == 0) {
-            throw new IotLicenseException(400,"用户Id不能为空");
+        if(StringUtils.isEmpty(appName) || StringUtils.isEmpty(appKey)
+        || userId == 0) {
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(),ResultCode.VALIDATE_FAILED.getMsg());
         }
         Apply res = applyMapper.getApplyByAppName(appName);
         if (res != null) {
-            throw new IotLicenseException(400,"应用名已存在");
+            throw new IotLicenseException(ResultCode.FAILED.getCode(),ResultCode.FAILED.getMsg());
         }
         boolean re = applyMapper.addApply(appName, appKey, userId);
         if (!re) {
@@ -57,13 +53,9 @@ public class ApplyServiceImpl extends ServiceImpl<ApplyMapper, Apply> implements
 
     @Override
     public PageInfoModel<AppVo> getAppList(int pageNo, int pageSize, String appName) {
-        if(pageNo == 0) {
-            throw new IotLicenseException(400,"pageNo不能为空");
+        if(pageNo == 0 || pageSize == 0) {
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(),ResultCode.VALIDATE_FAILED.getMsg());
         }
-        if(pageSize == 0) {
-            throw new IotLicenseException(400, "pageSize不能为空");
-        }
-
         List<AppVo> records = applyMapper.getAppList(appName);
         records = records.stream().sorted(Comparator.comparing(AppVo::getAppId)).collect(Collectors.toList());
         List<AppVo> result = new ArrayList<>();

license/src/main/java/iot/sixiang/license/service/impl/DeviceServiceImpl.java

 package iot.sixiang.license.service.impl;
 
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import iot.sixiang.license.consts.ResultCode;
 import iot.sixiang.license.device.DeviceManager;
 import iot.sixiang.license.entity.Device;
 import iot.sixiang.license.handler.IotLicenseException;
@@ -34,11 +35,8 @@ public class DeviceServiceImpl extends ServiceImpl<DeviceMapper, Device> impleme
 
     @Override
     public PageInfoModel<DeviceVo> getDeviceList(int pageNo, int pageSize, String appName, String userName) {
-        if(pageNo == 0) {
-            throw new IotLicenseException(400,"pageNo不能为空");
-        }
-        if(pageSize == 0) {
-            throw new IotLicenseException(400, "pageSize不能为空");
+        if(pageNo == 0 || pageSize == 0) {
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(),ResultCode.VALIDATE_FAILED.getMsg());
         }
         List<DeviceVo> deviceTypes = deviceMapper.getDeviceList(appName,userName);
         deviceTypes = deviceTypes.stream().sorted(Comparator.comparing(DeviceVo::getDeviceId)).collect(Collectors.toList());
@@ -55,11 +53,8 @@ public class DeviceServiceImpl extends ServiceImpl<DeviceMapper, Device> impleme
 
     @Override
     public boolean addDevice(int appId, int count) {
-        if (appId == 0) {
-            throw new IotLicenseException(400, "应用Id不能为空");
-        }
-        if (count == 0) {
-            throw new IotLicenseException(400, "count不能为零或空");
+        if(appId == 0 || count == 0) {
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(),ResultCode.VALIDATE_FAILED.getMsg());
         }
         for (int i = 0; i < count; i++) {
             String sn = CommonUtil.genRandomNum(18);

license/src/main/java/iot/sixiang/license/service/impl/ResourceServiceImpl.java

 package iot.sixiang.license.service.impl;
 
+import iot.sixiang.license.consts.ResultCode;
 import iot.sixiang.license.handler.IotLicenseException;
 import iot.sixiang.license.mapper.ResourceMapper;
 import iot.sixiang.license.model.vo.ResourceVo;
@@ -20,8 +21,8 @@ public class ResourceServiceImpl implements ResourceService {
 
     @Override
     public List<ResourceVo> getResource(int userId) {
-        if (userId == 0) {
-            throw new IotLicenseException(400, "用户Id不能为空");
+        if(userId == 0) {
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(),ResultCode.VALIDATE_FAILED.getMsg());
         }
         List<ResourceVo> record = resourceMapper.getResource(userId);
         return record;

license/src/main/java/iot/sixiang/license/service/impl/ServerServiceImpl.java

@@ -2,11 +2,12 @@ package iot.sixiang.license.service.impl;
 
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import iot.sixiang.license.consts.ResultCode;
 import iot.sixiang.license.entity.Server;
+import iot.sixiang.license.handler.IotLicenseException;
 import iot.sixiang.license.mapper.ServerMapper;
 import iot.sixiang.license.service.ServerService;
-import iot.sixiang.license.util.JsonUtil;
-import org.springframework.beans.factory.annotation.Autowired;
+import org.apache.commons.lang3.StringUtils;
 import org.springframework.stereotype.Service;
 
 import javax.annotation.Resource;
@@ -28,33 +29,33 @@ public class ServerServiceImpl extends ServiceImpl<ServerMapper, Server> impleme
 
     @Override
     public List<Server> getServerList(int pageNo, int pageSize) {
-        Page<Server> page = new Page<>(pageNo,pageSize);
-        baseMapper.selectPage(page,null);
+        Page<Server> page = new Page<>(pageNo, pageSize);
+        baseMapper.selectPage(page, null);
         List<Server> records = page.getRecords();
         return records;
     }
 
     @Override
     public boolean deleteServer(String serverIp) {
-        if (JsonUtil.isNull(serverIp)) {
-            return false;
+        if (StringUtils.isEmpty(serverIp)) {
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(), ResultCode.VALIDATE_FAILED.getMsg());
         }
         return serverMapper.deleteServer(serverIp);
     }
 
     @Override
     public boolean addServer(String serverIp, int port) {
-        if (JsonUtil.isNull(serverIp) || JsonUtil.isNull(String.valueOf(port))) {
-            return false;
+        if (StringUtils.isEmpty(serverIp) || port == 0) {
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(), ResultCode.VALIDATE_FAILED.getMsg());
         }
-        return serverMapper.addServer(serverIp,port);
+        return serverMapper.addServer(serverIp, port);
     }
 
     @Override
     public boolean updateServer(String serverIp, int port) {
-        if (JsonUtil.isNull(serverIp) || JsonUtil.isNull(String.valueOf(port))) {
-            return false;
+        if (StringUtils.isEmpty(serverIp) || port == 0) {
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(), ResultCode.VALIDATE_FAILED.getMsg());
         }
-        return serverMapper.updateServer(serverIp,port);
+        return serverMapper.updateServer(serverIp, port);
     }
 }

license/src/main/java/iot/sixiang/license/service/impl/SysOperLogServiceImpl.java

 package iot.sixiang.license.service.impl;
 
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import iot.sixiang.license.consts.ResultCode;
 import iot.sixiang.license.entity.SysOperLog;
 import iot.sixiang.license.handler.IotLicenseException;
 import iot.sixiang.license.mapper.SysOperLogMapper;
@@ -37,11 +38,8 @@ public class SysOperLogServiceImpl extends ServiceImpl<SysOperLogMapper, SysOper
 
     @Override
     public PageInfoModel<SysOperLog> getOperLogList(int pageNo, int pageSize) {
-        if(pageNo == 0) {
-            throw new IotLicenseException(400,"pageNo不能为空");
-        }
-        if(pageSize == 0) {
-            throw new IotLicenseException(400, "pageSize不能为空");
+        if(pageNo == 0 || pageSize == 0) {
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(),ResultCode.VALIDATE_FAILED.getMsg());
         }
         List<SysOperLog> records = sysOperLogMapper.getOperLogList();
         records = records.stream().sorted(Comparator.comparing(SysOperLog::getId)).collect(Collectors.toList());

license/src/main/java/iot/sixiang/license/service/impl/UserServiceImpl.java

@@ -2,13 +2,13 @@ package iot.sixiang.license.service.impl;
 
 
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import iot.sixiang.license.consts.ResultCode;
 import iot.sixiang.license.entity.User;
 import iot.sixiang.license.handler.IotLicenseException;
 import iot.sixiang.license.mapper.UserMapper;
 import iot.sixiang.license.model.PageInfoModel;
 import iot.sixiang.license.model.vo.UserVo;
 import iot.sixiang.license.service.UserService;
-import iot.sixiang.license.util.JsonUtil;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.stereotype.Service;
 
@@ -34,11 +34,8 @@ public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements Us
 
     @Override
     public PageInfoModel<UserVo> getUserList(int pageNo, int pageSize,String userName, String company) {
-        if(pageNo == 0) {
-            throw new IotLicenseException(400,"pageNo不能为空");
-        }
-        if(pageSize == 0) {
-            throw new IotLicenseException(400, "pageSize不能为空");
+        if(pageNo == 0 || pageSize == 0) {
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(),ResultCode.VALIDATE_FAILED.getMsg());
         }
         List<UserVo> records = userMapper.getUserList(userName,company);
         records = records.stream().sorted(Comparator.comparing(UserVo::getUserId)).collect(Collectors.toList());
@@ -55,31 +52,28 @@ public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements Us
 
     @Override
     public boolean deleteUser(int userId) {
-        if (JsonUtil.isNull(String.valueOf(userId))) {
-            return false;
+        if(userId == 0) {
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(),ResultCode.VALIDATE_FAILED.getMsg());
         }
         return userMapper.deleteUser(userId);
     }
 
     @Override
     public boolean addUser(String userName, String company, String password) {
-        if(StringUtils.isEmpty(userName)) {
-            throw new IotLicenseException(400,"用户名不能为空");
-        }
-        if(StringUtils.isEmpty(company)) {
-            throw new IotLicenseException(400,"公司名不能为空");
+        if(StringUtils.isEmpty(userName) || StringUtils.isEmpty(company)) {
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(),ResultCode.VALIDATE_FAILED.getMsg());
         }
         User res = userMapper.getUserByUserName(userName);
         if (res != null) {
-            throw new IotLicenseException(400,"用户名已存在");
+            throw new IotLicenseException(ResultCode.FAILED.getCode(),ResultCode.FAILED.getMsg());
         }
         return userMapper.addUser(userName,company,password);
     }
 
     @Override
     public boolean updateUser(int userId, String password) {
-        if (JsonUtil.isNull(String.valueOf(userId)) || JsonUtil.isNull(password)) {
-            return false;
+        if(userId == 0 || StringUtils.isEmpty(password)) {
+            throw new IotLicenseException(ResultCode.VALIDATE_FAILED.getCode(),ResultCode.VALIDATE_FAILED.getMsg());
         }
         return userMapper.updateUser(userId,password);
     }

license/src/main/java/iot/sixiang/license/util/JsonUtil.java

-package iot.sixiang.license.util;
-
-
-/**
- * Created by m33 on 2022/6/8 9:57
- */
-public class JsonUtil {
-    public static boolean isNull(String str) {
-        if(str == null || str.isEmpty()) {
-            return true;
-        }
-        return false;
-    }
-}