spring3 mvc 添加aop支持（Spring MVC 注解下Controller 的AOP）

	<bean id="auth" class="com.leo.security.MyDecisoinVoter">
	</bean>
	<aop:config proxy-target-class="true">
		<aop:aspect id="authAspect" ref="auth">
			[color=red]<aop:pointcut id="authP" expression="execution(* com.leo.control.*.*(..))" />[/color]
			<aop:around pointcut-ref="authP" method="authPermission" />
		</aop:aspect>
	</aop:config>

import java.lang.reflect.Method;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.servlet.ModelAndView;

public class MyDecisoinVoter {

	/**
	 * 得到request的方法 1.HttpServletRequest request = ((ServletRequestAttributes)
	 * RequestContextHolder .getRequestAttributes()).getRequest(); 2.如下
	 */
	@Autowired(required = true)
	private HttpServletRequest request;

	public Object authPermission(JoinPoint joinPoint) throws Throwable {
		MethodInvocationProceedingJoinPoint methodJoinPoint = (MethodInvocationProceedingJoinPoint) joinPoint;
		MethodSignature methodSignature = (MethodSignature) methodJoinPoint
				.getSignature();
		Method method = methodSignature.getMethod();

		int range = Integer.parseInt(request.getParameter("range"));
		if (range > 10)
			return new ModelAndView("addUserInput");
		return new ModelAndView("index");
	}


}

在使用spring mvc时,通常用它的aop来记录日志（或者拦截其它的操作）,但在spring mvc采用@Controller注解时,对Controller进行Aop拦截不起作用（上面的配置不起作用, <aop:pointcut id="authP" expression="execution(* com.leo.control.*.*(..))" />上面的红色是配置自己controller所有的方法）,原因是该注解的Controller已被spring容器内部代理了.


查网上的资料如下两种配置起作用
1.xml

	<bean id="auth" class="com.leo.security.MyDecisoinVoter">
	</bean>
	<aop:config proxy-target-class="true">
		<aop:aspect id="authAspect" ref="auth">
			<aop:pointcut id="authP"
				expression="execution(* org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(..))" />
			<aop:around pointcut-ref="authP" method="authPermission" />
		</aop:aspect>

	</aop:config>

2.annonation

package com.autoabacus.dal.controller;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;
@Component
@Aspect
public class Aop {
	public Aop() {
		System.out.println("Aop");
	}
	// @Around("within(org.springframework.web.bind.annotation.support.HandlerMethodInvoker..*)")
	@Around("execution(* org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(..))")
	public Object aa(ProceedingJoinPoint pjp)  throws Throwable 
	{
		try {
			Object retVal = pjp.proceed();
			System.out.println(retVal);
			return retVal;
		} catch (Exception e) {
			System.out.println("异常");
			return null;
		}
	}
}