SpringBoot如何优雅地处理全局异常详解

@RestControllerAdvice
public class GlobalExceptionHandler {
    /**
   * 处理空指针的异常
   * @param req
   * @param e
   * @return
   */
  @ExceptionHandler(value =NullPointerException.class)
  public BaseResponseFacade exceptionHandler(HttpServletRequest req, NullPointerException e){
    log.error("发生空指针异常！原因是:",e);
    return ResponseUtil.error(ResponseCode.ERROR);
  }
}

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.experimental.Accessors;

/**
 * @Description 自定义异常
 * @Date 2019-08-05 15:49
 * @Created by 程序员小明
 */
@Data
@AllArgsConstructor
@Accessors(chain = true)
public class BizException extends RuntimeException {
  /**
   * 错误码
   */
  protected Integer errorCode;
  /**
   * 错误信息
   */
  protected String errorMsg;
}

@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {

  /**
   * 处理自定义的业务异常
   * @param req
   * @param e
   * @return
   */
  @ExceptionHandler(value = BizException.class)
  public BaseResponseFacade bizExceptionHandler(HttpServletRequest req, BizException e){
    log.error("发生业务异常！原因是：{}",e.getErrorMsg());
    return ResponseUtil.error(e.getErrorCode(),e.getErrorMsg());
  }

  /**
   * 处理空指针的异常
   * @param req
   * @param e
   * @return
   */
  @ExceptionHandler(value =NullPointerException.class)
  public BaseResponseFacade exceptionHandler(HttpServletRequest req, NullPointerException e){
    log.error("发生空指针异常！原因是:",e);
    return ResponseUtil.error(ResponseCode.ERROR);
  }


  /**
   * 处理其他异常
   * @param req
   * @param e
   * @return
   */
  @ExceptionHandler(value =Exception.class)
  public BaseResponseFacade exceptionHandler(HttpServletRequest req, Exception e){
    log.error("未知异常！原因是:",e);
    return ResponseUtil.error(ResponseCode.INTERNAL_SERVER_ERROR);
  }
}

@GetMapping("/test")
public BaseResponseFacade test(){
 if(true){
  throw new BizException(1,"error");
 }
 return ResponseUtil.success();
}

{"errorCode":1,"errorMsg":"error","data":null}