Question

我正在与AOP和自定义错误处理程序进行战斗。我有一个控制器＆＃34; WorkingController＆＃34; - 它按预期工作。

@Controller
public class WorkingController extends BaseController {
    
    @RequestMapping("/welcome")
    public ModelAndView helloWorld() {
        return new ModelAndView("welcome", "message", "<h3>********** Hello World, Success!</h3>");
    }
    
    @RequestMapping("/success")
    public void test(HttpServletResponse response) {
        writeResponse(response, "Success!", ContentType.TEXT_JSON);
    }
    
    @RequestMapping("/test")
    public void test2(HttpServletResponse response) throws IOException {
        throw new IOException("This exception should be handled by custom handler.");
    }
    
    @InterestingMethod
    @RequestMapping("/aspect")
    public void test3(@InterestingArg @RequestParam(value = "id", required = false) String id,
                      HttpServletResponse response) throws IOException, AccessDeniedException {
        throw new IOException("This exception should also be handled by custom handler.");
    }
}

class BaseController {

    @ExceptionHandler(Exception.class)
    public void handleException(Throwable ex, HttpServletRequest request, HttpServletResponse response) {
        System.out.println("Exception handled by BaseController, great work!: " + ex.getMessage());
        ServletUtil.writeResponse(response, JSONObject.fromObject("Error").toString(),
                ContentType.TEXT_JSON.toString(), false, "UTF-8");
    }
    
    void writeResponse(HttpServletResponse response, String data, ContentType contentType) {
        ServletUtil.writeResponse(response, data, contentType.toString(), false, "UTF-8");
    }
    
}

我的情况迫使我创建界面，标记我的控制器，Aspect会检查用户是否有权访问给定的端点 - 所以我有MarkedController接口和NotWorkingController。

@Controller
public class NotWorkingController extends BaseController implements MarkedController {

    public void test2(HttpServletResponse response) throws IOException {
        throw new IOException("NotWorkingController, This exception should be handled by custom handler.");
    }
    
    @InterestingMethod
    public void test3(@InterestingArg String id,
                      HttpServletResponse response) throws IOException, AccessDeniedException {
        throw new IOException("NotWorkingController, This exception should also be handled by custom handler.");
    }
}

@Controller
public interface MarkedController {
    
    @RequestMapping("/test2")
    void test2(HttpServletResponse response) throws IOException;

    @RequestMapping("/aspect2")
    void test3(@RequestParam(value = "id", required = false) String id,
               HttpServletResponse response) throws IOException, AccessDeniedException;
}

@Aspect
public class InterestingMethodAspect {
    @Pointcut("@annotation(interestingMethod)")
    public void interestingMethodPointcut(InterestingMethod interestingMethod) {
    }

    @Before("(interestingMethodPointcut(interestingMethod))")
    public void asd(JoinPoint joinPoint, InterestingMethod interestingMethod) throws AccessDeniedException {
        processArguments(joinPoint);
    }

    private void processArguments(JoinPoint joinPoint) throws AccessDeniedException {
        throw new AccessDeniedException("You don't have access to this endpoint.");
    }
}

这对我来说有点神奇，因为：

在NotWorkingController中，Aspect代码抛出的异常不由自定义异常处理程序（位于BaseController中）处理。
我被迫将所有@RequestMappings移动到界面 - 在我的情况下它有点烦人。怎么预防？

那么，我应该在哪里看，我应该检查什么？提前感谢任何建议。

BTW：完整的maven项目可用here。

Answer 1

嗯，我有答案。

对于第一个问题（异常捕获）： HandlerExceptionResolver完成了我所需要的一切。我已在@ExceptionHandler中的handleException方法中删除了BaseController注释，HandlerExceptionResolver的自定义实现正在捕捉所有例外情况。）

第二个问题：我不得不从基于JDK的代理切换到基于CGLIB的代理。

如何使用自定义处理程序处理由方面抛出的异常

1 个答案: