package com.et.exception.controller;
import com.et.exception.config.BizException;import com.et.exception.model.User;import org.springframework.web.bind.annotation.*;
import java.util.HashMap;import java.util.Map;
@RestControllerpublic class HelloWorldController {    @RequestMapping("/hello")    public Map<String, Object> showHelloWorld(){        Map<String, Object> map = new HashMap<>();        map.put("msg", "HelloWorld");        return map;    }   @PostMapping("/user")   public boolean insert(@RequestBody User user) {      System.out.println("add...");      if(user.getName()==null){         throw  new BizException("-1","username is empty！");      }      return true;   }
   @PutMapping("/user")   public boolean update(@RequestBody User user) {      System.out.println("update...");      //mock NullException      String str=null;      str.equals("111");      return true;   }
   @DeleteMapping("/user")   public boolean delete(@RequestBody User user)  {      System.out.println("delete...");      //mock Exception      Integer.parseInt("abc123");      return true;   }

}

package com.et.exception.config;
import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.web.bind.annotation.ControllerAdvice;import org.springframework.web.bind.annotation.ExceptionHandler;import org.springframework.web.bind.annotation.ResponseBody;
import javax.servlet.http.HttpServletRequest;
@ControllerAdvicepublic class GlobalExceptionHandler {   private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);      /**    *process BizException    * @param req    * @param e    * @return    */    @ExceptionHandler(value = BizException.class)    @ResponseBody   public  ResultBody bizExceptionHandler(HttpServletRequest req, BizException e){       logger.error("biz exception！the reason is：{}",e.getErrorMsg());       return ResultBody.error(e.getErrorCode(),e.getErrorMsg());    }
   /**    * process NUllException    * @param req    * @param e    * @return    */   @ExceptionHandler(value =NullPointerException.class)   @ResponseBody   public ResultBody exceptionHandler(HttpServletRequest req, NullPointerException e){      logger.error("null exception！the reason is：",e);      return ResultBody.error(CommonEnum.BODY_NOT_MATCH);   }

    /**    * unkown Exception     * @param req     * @param e     * @return     */    @ExceptionHandler(value =Exception.class)   @ResponseBody   public ResultBody exceptionHandler(HttpServletRequest req, Exception e){       logger.error("unkown Exception！the reason is:",e);           return ResultBody.error(CommonEnum.INTERNAL_SERVER_ERROR);    }}

package com.et.exception.config;
public class BizException extends RuntimeException {
   private static final long serialVersionUID = 1L;

   protected String errorCode;
   protected String errorMsg;
   public BizException() {      super();   }
   public BizException(BaseErrorInfoInterface errorInfoInterface) {      super(errorInfoInterface.getResultCode());      this.errorCode = errorInfoInterface.getResultCode();      this.errorMsg = errorInfoInterface.getResultMsg();   }      public BizException(BaseErrorInfoInterface errorInfoInterface, Throwable cause) {      super(errorInfoInterface.getResultCode(), cause);      this.errorCode = errorInfoInterface.getResultCode();      this.errorMsg = errorInfoInterface.getResultMsg();   }      public BizException(String errorMsg) {      super(errorMsg);      this.errorMsg = errorMsg;   }      public BizException(String errorCode, String errorMsg) {      super(errorCode);      this.errorCode = errorCode;      this.errorMsg = errorMsg;   }
   public BizException(String errorCode, String errorMsg, Throwable cause) {      super(errorCode, cause);      this.errorCode = errorCode;      this.errorMsg = errorMsg;   }   
   public String getErrorCode() {      return errorCode;   }
   public void setErrorCode(String errorCode) {      this.errorCode = errorCode;   }
   public String getErrorMsg() {      return errorMsg;   }
   public void setErrorMsg(String errorMsg) {      this.errorMsg = errorMsg;   }
   public String getMessage() {      return errorMsg;   }
   @Override   public Throwable fillInStackTrace() {      return this;   }
}

package com.et.exception.config;
import com.alibaba.fastjson.JSONObject;
public class ResultBody {
   private String code;
   private String message;

   private Object result;
   public ResultBody() {   }
   public ResultBody(BaseErrorInfoInterface errorInfo) {      this.code = errorInfo.getResultCode();      this.message = errorInfo.getResultMsg();   }
   public String getCode() {      return code;   }
   public void setCode(String code) {      this.code = code;   }
   public String getMessage() {      return message;   }
   public void setMessage(String message) {      this.message = message;   }
   public Object getResult() {      return result;   }
   public void setResult(Object result) {      this.result = result;   }

   public static ResultBody success() {      return success(null);   }
   public static ResultBody success(Object data) {      ResultBody rb = new ResultBody();      rb.setCode(CommonEnum.SUCCESS.getResultCode());      rb.setMessage(CommonEnum.SUCCESS.getResultMsg());      rb.setResult(data);      return rb;   }

   public static ResultBody error(BaseErrorInfoInterface errorInfo) {      ResultBody rb = new ResultBody();      rb.setCode(errorInfo.getResultCode());      rb.setMessage(errorInfo.getResultMsg());      rb.setResult(null);      return rb;   }

   public static ResultBody error(String code, String message) {      ResultBody rb = new ResultBody();      rb.setCode(code);      rb.setMessage(message);      rb.setResult(null);      return rb;   }

   public static ResultBody error( String message) {      ResultBody rb = new ResultBody();      rb.setCode("-1");      rb.setMessage(message);      rb.setResult(null);      return rb;   }
   @Override   public String toString() {      return JSONObject.toJSONString(this);   }
}

package com.et.exception.model;
import com.alibaba.fastjson.JSONObject;
import java.io.Serializable;
public class User implements Serializable {   private static final long serialVersionUID = 1L;    private int id;    private String name;    private int age;        public User(){    }
   public int getId() {      return id;   }      public void setId(int id) {      this.id = id;   }
   public String getName() {      return name;   }
   public void setName(String name) {      this.name = name;   }
   public int getAge() {      return age;   }
   public void setAge(int age) {      this.age = age;   }
   public String toString() {      return JSONObject.toJSONString(this);   }}