Springboot统一异常处理

Springboot统一异常处理

本文是基于SpringBoot 2.0.4.release环境，学习和使用通用统一异常处理：

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一、统一异常处理

（1）配置异常处理通知类

• CommonExceptionHandler.java

@ControllerAdvice
public class CommonExceptionHandler {

    @ExceptionHandler(LyException.class)
    public ResponseEntity<ExceptionResult> handleException(LyException e){
        ExceptionEnum exceptionEnum = e.getExceptionEnum();
        return ResponseEntity.status(exceptionEnum.getHttpStatus()).body(new ExceptionResult(e.getExceptionEnum()));
    }
}

（2）配置异常枚举类

• ExceptionEnum.java

@Getter
@NoArgsConstructor
@AllArgsConstructor
public enum ExceptionEnum {
    USERNAME_CANNOT_BE_NULL(HttpStatus.BAD_REQUEST.value(), "用户名不能为空"),
    PASSWORD_CANNOT_BE_NULL(HttpStatus.BAD_REQUEST.value(), "密码不能为空"),
    PASSWORD_BE_INCORRECT(HttpStatus.BAD_REQUEST.value(), "密码不正确");

    private int httpStatus;
    private String msg;
}

（3）配置异常类

• LyException.java

@Getter
@NoArgsConstructor
@AllArgsConstructor
public class LyException extends RuntimeException {
    private ExceptionEnum exceptionEnum;
}

（4）配置异常结果类

• ExceptionResult.java

@Data
@NoArgsConstructor
@AllArgsConstructor
public class ExceptionResult {
    private int status;
    private String message;
    private Long timestamp;

    public ExceptionResult(ExceptionEnum em){
        this.status = em.getHttpStatus();
        this.message = em.getMsg();
        this.timestamp = System.currentTimeMillis();
    }
}

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