spring基于@ExceptionHandler的异常处理

最新推荐文章于 2025-11-11 15:02:20 发布

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本文介绍了一种基于Spring MVC框架的自定义异常处理机制。通过创建一个基础的Controller类，该类可以处理自定义异常（CustomException），并根据不同类型的请求（同步或异步）返回相应的错误信息。

部署运行你感兴趣的模型镜像

定义一个基础的controller 类，其他的都继承于他

@Controller
public class GenericController {
	private static final Logger LOGGER = LoggerFactory.getLogger(GenericController.class);

	
	@ExceptionHandler(CustomException.class)
	public void resolveCustomException(HttpServletRequest req, HttpServletResponse res, CustomException e)
			throws Exception {
		LOGGER.error(e.getMessage(), e);

		// 异步请求
		if (isAsyncRequest(req)) {
			res.setContentType("application/json");
			Writer.write(res, Ajax.buildErrorResult(e.getMessage()));
		}
		// 同步请求
		else {
			req.setAttribute("exception", Ajax.buildExceptionResult());
			req.getRequestDispatcher("/error/500.html").forward(req, res);
		}
	}


private boolean isAsyncRequest(HttpServletRequest request) {
	return request.getHeader("X-Requested-With") != null;

关于writer类

public class Writer {
	private static final Logger LOGGER = LoggerFactory.getLogger(Writer.class);

	private static final ObjectMapper MAPPER = new ObjectMapper();

	public static void write(HttpServletResponse res, Object object) {
		try {
			MAPPER.writeValue(res.getOutputStream(), object);
		} catch (IOException e) {
			LOGGER.error(e.getMessage(), e);
		}
	}

}

自定义业务异常

public class CustomException extends RuntimeException {
	private static final long serialVersionUID = 6666170142692714385L;

	public CustomException() {
		super();
	}

	public CustomException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
		super(message, cause, enableSuppression, writableStackTrace);
	}

	public CustomException(String message, Throwable cause) {
		super(message, cause);
	}

	public CustomException(String message) {
		super(message);
	}

	public CustomException(Throwable cause) {
		super(cause);
	}

}

然后程序抛出CustomException异常的地方都执行控制器里面代码1处的逻辑

然后我们可以定义多种异常.

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