注解+切面实现一个简单的异常处理

简易异常处理实现（AOP+注解）

1. 增加注解

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface ExceptionResolve {
    String code() default "null";
    String message() default "null";
}

2. 增加切面

@Slf4j
@Aspect
@Component
public class ExceptionAspect {
    @Around("@annotation(exceptionResolve)")
    public Object exceptionHandle(ProceedingJoinPoint joinPoint, ExceptionResolve exceptionResolve){
        try {
            return joinPoint.proceed();
        } catch (Throwable throwable) {
            throwable.printStackTrace();
            // 返回值封装
            Map<String, String> result = new HashMap<>(2);
            result.put("code", exceptionResolve.code());
            result.put("message", exceptionResolve.message() + throwable.getMessage());
            return  result;
        }
    }
}

3. 增加测试

@GetMapping("/test")
@ExceptionResolve(code="000", message = "ERROR")
public Object test(){
	System.out.println(1/0);
	return "SUCCESS";
}

4. 返回结果

{
  "message": "ERROR/ by zero",
  "code": "000"
}