基于代理类ProxyFactoryBean的AOP实现---环绕通知编码实例

阳光穿透心脏的1/2处 2022-07-12 04:54 213阅读 0赞

代码：

1.配置文件

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:p="http://www.springframework.org/schema/p"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
    	
    	<bean id="userDAO" class="com.springtest1.dao.UserDAOImpl">	 
    	</bean>
    	
    	<bean id="userBiz" class="com.springtest1.biz.UserBizImpl">
    	  
    	  <property name="userDAO" ref="userDAO" />
    	</bean>	
    		
    	
    	<bean id="logAdvice" class="com.springtest1.aop.LogAdvice"></bean>
        
        
    	<bean id="afterLogAdvice" class="com.springtest1.aop.AfterLogAdvice"></bean>
    	
    	
    	<bean id="throwsLogAdvice" class="com.springtest1.aop.ThrowsLogAdvice"></bean>
    	
    	
    	<bean id="logAroundAdvice" class="com.springtest1.aop.LogAroundAdvice"></bean>
    	
    	
    	<bean id="ub" class="org.springframework.aop.framework.ProxyFactoryBean">
    	  <property name="proxyInterfaces">
    	    <value>com.springtest1.biz.UserBiz</value>
    	  </property>
    	  <property name="interceptorNames">
    	    <list>	     
    	     <value>logAdvice</value>	
    	     
    	     <value>afterLogAdvice</value>  
    	      
    	     <value>throwsLogAdvice</value>
    	     
    	     <value>logAroundAdvice</value>
    	    </list>
    	  </property>
    	  <property name="target" ref="userBiz"></property>
    	</bean>
    </beans>

2.数据访问层

UserDAO.java

package com.springtest1.dao;
    
    public interface UserDAO {
       //添加用户
    	public void addUser(String username,String password);
    	//删除用户
    	public void delUser(int id);
    }

UserDAOImpl.java

package com.springtest1.dao;
    
    public class UserDAOImpl implements UserDAO {
    
    	@Override
    	public void addUser(String username, String password) {
    		// TODO Auto-generated method stub
           System.out.println(username+"用户添加成功");
    	}
    
    	@Override
    	public void delUser(int id) {
    		// TODO Auto-generated method stub
           System.out.println("编号为"+id+"的用户被删除");
    	}
    
    }

3.编写业务逻辑层

UserBiz.java

package com.springtest1.biz;
    
    public interface UserBiz {
       //添加用户
    	public void addUser(String username,String password);
    	//删除用户
    	public void delUser(int id);
    }

UserBizImpl.java

package com.springtest1.biz;
    
    import com.springtest1.dao.UserDAO;
    import com.springtest1.dao.UserDAOImpl;
    public class UserBizImpl implements UserBiz {
    	//使用UserDAO接口声明了一个对象
    	//并为其添加set方法，用于依赖注入
    	UserDAO userDAO;
    	public void setUserDAO(UserDAO userDAO){
    		this.userDAO=userDAO;
    	}
    
    	@Override
    	public void addUser(String username, String password) {
    		// TODO Auto-generated method stub
           userDAO.addUser( username, password);
    	}
    
    	@Override
    	public void delUser(int id) {
    		// TODO Auto-generated method stub
           userDAO.delUser(id);
           throw new RuntimeException("这是特意抛出的异常信息！");
    	}
    
    }

4.编写方面代码

LogAroundAdvice.java

package com.springtest1.aop;
    
    import org.aopalliance.intercept.MethodInterceptor;
    import org.aopalliance.intercept.MethodInvocation;
    import org.apache.log4j.Logger;
    
    public class LogAroundAdvice implements MethodInterceptor {
    
    	private Logger logger=Logger.getLogger(LogAdvice.class);
    	public Object invoke(MethodInvocation invocation) throws Throwable {
    		// TODO Auto-generated method stub
    		long beginTime=System.currentTimeMillis();
    		invocation.proceed();
    		long endTime=System.currentTimeMillis();
    		//获取被调用的方法名
    		String targetMethodName=invocation.getMethod().getName();
    		//日志格式字符串
    		String logInfoText="环绕通知: "+targetMethodName+"方法调用前时间"+beginTime+"毫秒,"+"调用后时间"+endTime+"毫秒";
    		//将日志信息写入配置的文件中
    		logger.info(logInfoText);
    		return null;
    	}
    
    }

5.测试类

AOPTest.java

package com.springtest1;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    import com.springtest1.biz.UserBiz;
    
    public class AOPTest {
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    		//加载applicationContext.xml配置
    		ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
    		//获取配置中的UserBizImpl实例
    		UserBiz userBiz =(UserBiz)context.getBean("ub");	
    		userBiz.addUser("zhangsan","123");
    		userBiz.delUser(1);
    	}
     
    }

6.截图

![Center][]

[Center]: /images/20220711/09197c6a78964f09ada0c22a08e8e309.png