Spring MVC controller 的AOP应用

在使用Spring MVC的时候，一般会有至少2个Spring的XML。一个用来配置一般的Spring的Bean（如：spring-ctx-application.xml），一个用来声明Spring Controller对于的view的内容（如：spring-mvc-servlet.xml）。

很多人发现在spring-ctx-application.xml里面声明AOP对Controller不起作用，这是为什么呢？因为Spring MVC里面的一般性配置spring-ctx-application.xml是一个上下文，而管理Spring MVC的spring-mvc-servlet.xml又是一个上下文。对Controller的配置都在spring-mvc-servlet.xml这个里面。也就是说存在2个不同的Spring上下文。你配置在spring-ctx-application.xml的堆Controller的AOP当然不起作用了。如何修改呢？在spring-mvc-servlet.xml里面再添加一份AOP的配置即可。同样的道理，在Controller里面配置@Value，也需要在spring-mvc-servlet.xml里面指定.properties的配置文件，才能正确的读取内容。

spring-mvc-servlet.xml如下：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee"
	xmlns:jms="http://www.springframework.org/schema/jms" xmlns:lang="http://www.springframework.org/schema/lang"
	xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:oxm="http://www.springframework.org/schema/oxm"
	xmlns:p="http://www.springframework.org/schema/p" xmlns:sec="http://www.springframework.org/schema/security"
	xmlns:task="http://www.springframework.org/schema/task" xmlns:tx="http://www.springframework.org/schema/tx"

	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
		http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.0.xsd
		http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd
		http://www.springframework.org/schema/jms http://www.springframework.org/schema/jms/spring-jms-4.0.xsd
		http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-4.0.xsd
		http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
		http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-4.0.xsd
		http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-4.0.xsd
		http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.0.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
	<bean
		class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="locations">
			<list>
				<value>classpath:console-configure.properties</value>
			</list>
		</property>
	</bean>

	<mvc:annotation-driven />

	<context:component-scan base-package="com.kanpiaoxue.rigel.dmap.console.controller" />
	
	
	<aop:aspectj-autoproxy />
		<bean id="performanceCalculate" class="com.kanpiaoxue.rigel.dmap.console.utils.PerformanceCalculateController">
		<property name="order" value="100" />
	</bean>
	
	<bean class="com.kanpiaoxue.rigel.dmap.console.utils.DmapExceptionResolver" />
    
    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" >
        <property name="messageConverters">
            <list>  
                <ref bean="mappingJacksonHttpMessageConverter"/>  
            </list>  
        </property>
    </bean>
    
    <bean id="mappingJacksonHttpMessageConverter" 
        class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">  
        <property name="supportedMediaTypes">  
            <list>
                <value>text/html;charset=UTF-8</value>
                <value>text/javascript;charset=UTF-8</value>
            </list>
        </property>  
    </bean>
    
	<bean
		class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
		<property name="mediaTypes">
			<map>
				<entry key="html" value="text/html" />
				<entry key="json" value="application/json" />
				<entry key="xml" value="application/xml" />
			</map>
		</property>
		<property name="viewResolvers">
			<list>
				<bean
					class="org.springframework.web.servlet.view.InternalResourceViewResolver">
					<property name="viewClass"
						value="org.springframework.web.servlet.view.JstlView" />
					<property name="prefix" value="/WEB-INF/views/" />
					<property name="suffix" value=".jsp" />
				</bean>
			</list>
		</property>
<!-- 		<property name="defaultViews">
			<list>
				<bean
					class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />
			</list>
		</property> -->
	</bean>


	<bean id="multipartResolver"
		class="org.springframework.web.multipart.commons.CommonsMultipartResolver"
		p:defaultEncoding="UTF-8">
		<property name="resolveLazily" value="true" />
		<property name="maxUploadSize" value="${file.upload.max.size}" />
		<property name="maxInMemorySize" value="${file.upload.max.in.memory.size}" />
	</bean>

	<!-- cache start -->
	<!-- <bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager"
		p:cache-manager-ref="ehcache" />

	EhCache library setup
	<bean id="ehcache"
		class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
		<property name="configLocation" value="classpath:${dmap.console.cache.file}" />
	</bean> -->
	<!-- cache end -->
	
</beans>

AOP范例类如下：

package com.kanpiaoxue.rigel.dmap.console.utils;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.Ordered;

import com.google.common.base.Stopwatch;

/**
 * <pre>
 * PerformanceCalculateController .java

 * @author kanpiaoxue<br>
 * @version 1.0
 * Create Time 2014年8月29日 下午3:47:10<br>
 * Description : AOP性能切面类
 * </pre>
 */
@Aspect
public class PerformanceCalculateController implements Ordered {
    private static final Logger LOGGER = LoggerFactory
            .getLogger(PerformanceCalculate.class);

    private int order = 1;

    /**
     * <pre>
     * 统计指定切面的方法的耗时，单位：毫秒
     *  @param point
     *  @return
     *  @throws Throwable
     * </pre>
     */
    @Around("execution(* com.kanpiaoxue.rigel.dmap.console.controller.*.*(..))")
    public Object calculateConsume(ProceedingJoinPoint point) throws Throwable {

        Object[] args = point.getArgs();
        Stopwatch watch = Stopwatch.createStarted();
        Object rs = null;
        if (null != args) {
            rs = point.proceed(args);
        } else {
            rs = point.proceed();
        }
        String className = point.getTarget().getClass().getName();
        String methodName = point.getSignature().getName();
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug(String.format("%s.%s consumes %s.", className,
                    methodName, watch.toString()));
        }
        return rs;
    }

    @Override
    public int getOrder() {
        return this.order;
    }

    public void setOrder(int order) {
        this.order = order;
    }

}