[转]Spring AOP的annotation实现

 记录一下使用注解实现spring AOP的小例子。

第一步，导入相关的jar包：aspectjweaver-1.6.8.jar（提供注解 org.aspectj.lang.annotation.Aspect等）、spring-aop-3.0.4.RELEASE.jar（提供自动代理 创建器 org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator）、 aopalliance-1.0.jar（提供拦截器功能）。

第二步，配置applicationContext.xml

<?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:jee="http://www.springframework.org/schema/jee"
 xmlns:tx=
"http://www.springframework.org/schema/tx"
    xmlns:context="http://www.springframework.org/schema/context"
 xmlns:aop=
"http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
    http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
    <!--其他配置在此省略...-->
    <!--配置aop自动创建代理-->
    <aop:aspectj-autoproxy/>
    <bean id="userManager"
 
class
=
"com.service.Impl.UserManagerImpl"
></bean>
    <bean class
=
"com.util.SecurityHandler"
></bean>
</beans>

其中相关AOP的配置包括：

1、xmlns:aop="http://www.springframework.org/schema/aop "
2、 xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd" 其中XSD的版本可以在spring-aop.jar中查看

3、<aop:aspectj-autoproxy/>
4、<bean class="com.util.SecurityHandler"></bean>在spring容器中添加切面类bean

 

含有连接点的类UserManager

package
 com.service;

import
 com.entity.User;

public
 
interface
 UserManager {
    public
 
void
 add(User user);
}

package
 com.service.Impl;

import
 org.apache.commons.logging.Log;
import
 org.apache.commons.logging.LogFactory;

import
 com.entity.User;
import
 com.service.UserManager;

public
 
class
 UserManagerImpl 
implements
 UserManager {
    private
 Log log = LogFactory.getLog(UserManagerImpl.
class
);

    public
 
void
 add(User user) {
        log.debug("add User:"
 + user.getUsername());
    }
}

切面实现类SecurityHandler.java

package
 com.util;

import
 org.aspectj.lang.annotation.After;
import
 org.aspectj.lang.annotation.Aspect;
import
 org.aspectj.lang.annotation.Before;

@Aspect
public
 
class
 SecurityHandler {
    // 在执行指定方法前执行
    @Before
(
"execution(* add*(..))"
)
    private
 
void
 checkSecurity() {
        System.out.println("添加前检查通过"
);
    }

    // 在执行指定方法后执行
    @After
(
"execution(* add*(..))"
)
    private
 
void
 checkResult() {
        System.out.println("添加后检查通过"
);
    }}

测试方法：

public
 
static
 
void
 main(String[] args) {
        ApplicationContext context = new
 ClassPathXmlApplicationContext(
"applicationContext.xml"
);
        UserManager userManager = (UserManager) context.getBean("userManager"
);

        User user = new
 User();
        user.setUsername("aaa"
);
        user.setPassword("bbb"
);

        userManager.add(user);
    }

执行结果如下：

添加前检查通过
2011-03-11 16:13:21,562 [main] DEBUG [com.service.Impl.UserManagerImpl] - add User:aaa
添加后检查通过

 

总结：在搭建示例过程中遇到 org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException异常， 提示无法获取spring-aop-3.0.xsd文件，后来发现是缺少spring-aop-3.0.4.RELEASE.jar，因为spring- aop-3.0.xsd在它里面。

 

 

 

来自：http://blog.csdn.net/cuihaiyang/article/details/6240413