spring 05自定义

╰半橙微兮° 2022-04-16 01:43 81阅读 0赞

第一步 增加maven一依赖  
pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    	<modelVersion>4.0.0</modelVersion>
    	<groupId>org.spring05</groupId>
    	<artifactId>spring05_custom_aop</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    
    	
    	<properties>
    		<spring.version>4.1.3.RELEASE</spring.version>
    		<aspectj.version>1.6.11</aspectj.version>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    	</properties>
    
    	
    	<dependencies>
    		<dependency>
    			<groupId>junit</groupId>
    			<artifactId>junit</artifactId>
    			<version>3.8.1</version>
    			<scope>test</scope>
    		</dependency>
    		
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-aop</artifactId>
    			<version>${spring.version}</version>
    		</dependency>
    		
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-context</artifactId>
    			<version>${spring.version}</version>
    		</dependency>
    		
    		<dependency>
    			<groupId>org.aspectj</groupId>
    			<artifactId>aspectjrt</artifactId>
    			<version>${aspectj.version}</version>
    		</dependency>
    		
    		<dependency>
    			<groupId>org.aspectj</groupId>
    			<artifactId>aspectjweaver</artifactId>
    			<version>${aspectj.version}</version>
    		</dependency>
    
    	</dependencies>
    </project>

第二步 编写 UserDao  
UserDao.java

package org.spring05;
    
    public interface UserDao {
    	void add();
    	void delete();
    }

第三步 编写 UserDaoImpl  
UserDaoImpl.java

package org.spring05;
    
    /** * 用户类（领域业务对象类） * @author yxl * */
    public class UserDaoImpl implements UserDao { 
    	public void add() { 
    		//int i=3/0;
    		System.out.println("增加了一个用户！");
    	}
    	public void delete() { 
    		System.out.println("删除了一个用户！");
    	}
    }

第四步 编写切面类Log  
Log.java

package org.spring05;
    
    import java.lang.reflect.Method;
    
    import org.aopalliance.intercept.MethodInvocation;
    import org.aspectj.lang.JoinPoint;
    
    /** 切面类 (公共业务类) 自定义方式实现不用继承任何类 */
    public class Log { 
    
    	/** * 前置通知 * @param method 被调用对象的方法 * @param args 被调用的方法参数 * @param target 被调用的方法的目标对象 */
    	public void myBefore(JoinPoint joinPoint) throws Throwable { 
    		System.out.println("前置通知：");
    	}
    	
    	/** * 后置通知 */
    	public void myAfter(JoinPoint joinPoint) throws Throwable { 
    		System.out.println("后置通知");
    	}
    
    	/** * 环绕通知 */
    	public Object invoke(MethodInvocation arg0) throws Throwable { 
    		System.out.println("环绕通知开始");
    		Object result=arg0.proceed();
    		System.out.println("环绕通知结束");
    		return result;
    	}
    	
    	/** * 增强处理 返回后通知 * 增强处理将在目标方法正常完成后被织入 * @param joinPoint */
    	public void myAfterReturning(JoinPoint joinPoint){ 
    		System.out.println("增强处理 返回后通知");
    	}
    	/** * 异常通知 */
    	public void myThrowing(JoinPoint joinPoint,Exception e) throws Throwable { 
    		System.out.println("后置通知");
    	}
    	
    	
    }

第五步 编写spring配置文件  
beans.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: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-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd ">
        <bean id="userDaoImpl" class="org.spring05.UserDaoImpl"/>
        <bean id="log" class="org.spring05.Log"></bean>
        <aop:config>
        	<aop:aspect ref="log">
    			
    			<aop:pointcut id="pointcut" expression="execution(public * org.spring05.*.*(..))"/>
        		
        		<aop:before method="myBefore" pointcut-ref="pointcut"/>
        		
        		<aop:after method="myAfter" pointcut-ref="pointcut"/>
        		
        		<aop:after-returning method="myAfterReturning" pointcut-ref="pointcut"/>
        		
        		<aop:after-throwing method="myThrowing" pointcut-ref="pointcut" throwing="e"/>
        	</aop:aspect>
    	</aop:config>
    	
    	
    </beans>

第六步 编写测试类  
Test.java

package org.spring05;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class Test { 
    	public static void main(String[] args) { 
    		ApplicationContext app = new ClassPathXmlApplicationContext("beans.xml");
    		UserDao userDao = (UserDao) app.getBean("userDaoImpl");
    		userDao.add();
    
    	}
    }

控制台结果

前置通知：
    增加了一个用户！
    后置通知
    增强处理 返回后通知