1.定義基礎異常接口類

/**
 * @description: 服務接口類
 * @author: MrVK
 * @date: 2021/4/19 21:39
 */
public interface BaseErrorInfoInterface {

    /**
     *  錯誤碼
     * @return
     */
    String getResultCode();

    /**
     * 錯誤描述
     * @return
     */
    String getResultMsg();
}

2.定義錯誤處理枚舉類

/**
 * @description: 異常處理枚舉類
 * @author: MrVK
 * @date: 2021/4/19 21:41
 * @version: v1.0
 */
public enum ExceptionEnum implements BaseErrorInfoInterface{

    // 數據操作錯誤定義
    SUCCESS("2000", "成功!"),
    BODY_NOT_MATCH("4000","請求的數據格式不符!"),
    SIGNATURE_NOT_MATCH("4001","請求的數字簽名不匹配!"),
    NOT_FOUND("4004", "未找到該資源!"),
    INTERNAL_SERVER_ERROR("5000", "服務器內部錯誤!"),
    SERVER_BUSY("5003","服務器正忙，請稍后再試!");

    /**
     * 錯誤碼
     */
    private final String resultCode;

    /**
     * 錯誤描述
     */
    private final String resultMsg;

    ExceptionEnum(String resultCode, String resultMsg) {
        this.resultCode = resultCode;
        this.resultMsg = resultMsg;
    }

    @Override
    public String getResultCode() {
        return resultCode;
    }

    @Override
    public String getResultMsg() {
        return resultMsg;
    }
}

3.自定義異常類

/**
 * @description: 自定義異常類
 * @author: MrVK
 * @date: 2021/4/19 21:44
 * @version: v1.0
 */
public class BizException extends RuntimeException{

    private static final long serialVersionUID = 1L;

    /**
     * 錯誤碼
     */
    protected String errorCode;
    /**
     * 錯誤信息
     */
    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;
    }

    @Override
    public Throwable fillInStackTrace() {
        return this;
    }
}

4.自定義響應體類

/**
 * @description: 自定義數據傳輸
 * @author: MrVK
 * @date: 2021/4/19 21:47
 * @version: v1.0
 */
public class ResultResponse {
    /**
     * 響應代碼
     */
    private String code;

    /**
     * 響應消息
     */
    private String message;

    /**
     * 響應結果
     */
    private Object result;

    public ResultResponse() {
    }

    public ResultResponse(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;
    }

    /**
     * 成功
     *
     * @return
     */
    public static ResultResponse success() {
        return success(null);
    }

    /**
     * 成功
     * @param data
     * @return
     */
    public static ResultResponse success(Object data) {
        ResultResponse rb = new ResultResponse();
        rb.setCode(ExceptionEnum.SUCCESS.getResultCode());
        rb.setMessage(ExceptionEnum.SUCCESS.getResultMsg());
        rb.setResult(data);
        return rb;
    }

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

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

    /**
     * 失敗
     */
    public static ResultResponse error( String message) {
        ResultResponse rb = new ResultResponse();
        rb.setCode("-1");
        rb.setMessage(message);
        rb.setResult(null);
        return rb;
    }

    @Override
    public String toString() {
        return JSONObject.toJSONString(this);
    }

}

5.自定義全局異常處理

/**
 * @description: 自定義異常處理
 * @author: MrVK
 * @date: 2021/4/19 21:51
 * @version: v1.0
 */
@ControllerAdvice
public class GlobalExceptionHandler {

    private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    /**
     * 處理自定義的業務異常
     * @param req
     * @param e
     * @return
     */
    @ExceptionHandler(value = BizException.class)
    @ResponseBody
    public ResultResponse bizExceptionHandler(HttpServletRequest req, BizException e){
        logger.error("發生業務異常！原因是：{}",e.getErrorMsg());
        return ResultResponse.error(e.getErrorCode(),e.getErrorMsg());
    }

    /**
     * 處理空指針的異常
     * @param req
     * @param e
     * @return
     */
    @ExceptionHandler(value =NullPointerException.class)
    @ResponseBody
    public ResultResponse exceptionHandler(HttpServletRequest req, NullPointerException e){
        logger.error("發生空指針異常！原因是:",e);
        return ResultResponse.error(ExceptionEnum.BODY_NOT_MATCH);
    }

    /**
     * 處理其他異常
     * @param req
     * @param e
     * @return
     */
    @ExceptionHandler(value =Exception.class)
    @ResponseBody
    public ResultResponse exceptionHandler(HttpServletRequest req, Exception e){
        logger.error("未知異常！原因是:",e);
        return ResultResponse.error(ExceptionEnum.INTERNAL_SERVER_ERROR);
    }
}

6.測試代碼

@PostMapping("/add")
public boolean add(@RequestBody User user) {
    //如果姓名為空就手動拋出一個自定義的異常！
    if(user.getName()==null){
        throw  new BizException("-1","用戶姓名不能為空！");
    }
    return true;
}

@PutMapping("/update")
public boolean update(@RequestBody User user) {
    //這里故意造成一個空指針的異常，并且不進行處理
    String str = null;
    str.equals("111");
    return true;
}

@DeleteMapping("/delete")
public boolean delete(@RequestBody User user)  {
    //這里故意造成一個異常，并且不進行處理
    Integer.parseInt("abc123");
    return true;
}

@GetMapping("/error")
@ExceptionHandler(value = NumberFormatException.class)
@ResponseBody
public ResultResponse exceptionHandler(HttpServletRequest req, NumberFormatException e){
    logger.error("發生類型轉換異常！原因是:",e);
    return ResultResponse.error(ExceptionEnum.PARAMS_NOT_CONVERT);
}

7.測試結果