SpringBoot 全局异常处理

自定义基础接口类

首先定义一个基础的接口类，自定义的错误描述枚举类需实现该接口

public interface BaseErrorInfoInterface {
    /** 错误码*/
	 String getResultCode();
	
	/** 错误描述*/
	 String getResultMsg();
}

自定义枚举类

然后我们这里在自定义一个枚举类，并实现该接口

public enum CommonEnum implements BaseErrorInfoInterface {
	// 数据操作错误定义
	SUCCESS("200", "成功!"), 
	BODY_NOT_MATCH("400","请求的数据格式不符!"),
	SIGNATURE_NOT_MATCH("401","请求的数字签名不匹配!"),
	NOT_FOUND("404", "未找到该资源!"), 
	INTERNAL_SERVER_ERROR("500", "服务器内部错误!"),
	SERVER_BUSY("503","服务器正忙，请稍后再试!")
	;

	/** 错误码 */
	private String resultCode;

	/** 错误描述 */
	private String resultMsg;

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

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

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

}

自定义异常类

我们在来自定义一个异常类，用于处理我们发生的业务异常

public class BizException extends RuntimeException {

	private static final long serialVersionUID = 1L;

	/**
	 * 错误码
	 */
	protected String errorCode;
	/**
	 * 错误信息
	 */
	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;
	}

	public String getMessage() {
		return errorMsg;
	}

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

}

自定义数据格式

顺便这里我们定义一下数据的传输格式

public class ResultBody {
	/**
	 * 响应代码
	 */
	private String code;

	/**
	 * 响应消息
	 */
	private String message;

	/**
	 * 响应结果
	 */
	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;
	}

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

	/**
	 * 成功
	 * @param data
	 * @return
	 */
	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;
	}

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

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

	/**
	 * 失败
	 */
	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);
	}

}

自定义全局异常处理类

编写自定义全局异常处理的类

@ControllerAdvice
public class GlobalExceptionHandler {
	private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);
	
	/**
	 * 处理自定义的业务异常
	 * @param req
	 * @param e
	 * @return
	 */
    @ExceptionHandler(value = BizException.class)  
    @ResponseBody  
	public  ResultBody bizExceptionHandler(HttpServletRequest req, BizException e){
    	logger.error("发生业务异常！原因是：{}",e.getErrorMsg());
    	return ResultBody.error(e.getErrorCode(),e.getErrorMsg());
    }

	/**
	 * 处理空指针的异常
	 * @param req
	 * @param e
	 * @return
	 */
	@ExceptionHandler(value =NullPointerException.class)
	@ResponseBody
	public ResultBody exceptionHandler(HttpServletRequest req, NullPointerException e){
		logger.error("发生空指针异常！原因是:",e);
		return ResultBody.error(CommonEnum.BODY_NOT_MATCH);
	}


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