SpringAOP之注解方式实现

向右看齐 2024-04-03 09:38 53阅读 0赞

通过注解的方式  
1）导入jar包

<dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.1.3.Release</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.1.3.Release</version>
    </dependency>
    
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>4.1.3.Release</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>4.1.3.Release</version>
    </dependency>
    
    
    
    
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>4.1.3.RELEASE</version>
    </dependency>
    
    
    
    
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.1.3</version>
    </dependency>
    
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.16</version>
    </dependency>
    
    
    
    
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>
    </dependency>
    
    
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.2</version>
      <scope>provided</scope>
    </dependency>
    
    
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>
    
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.37</version>
    </dependency>
    <dependency>
      <groupId>commons-dbutils</groupId>
      <artifactId>commons-dbutils</artifactId>
      <version>1.6</version>
    </dependency>
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.2</version>
    </dependency>
    
    
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>4.1.3.RELEASE</version>
    </dependency>
    
    
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>4.1.3.RELEASE</version>
    </dependency>
    
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
      <version>4.1.3.RELEASE</version>
    </dependency>
    
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>4.1.3.RELEASE</version>
    </dependency>
    
    
    
    
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.8.10</version>
    </dependency>
    
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
      <version>4.1.3.RELEASE</version>
    </dependency>
    
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>4.1.3.RELEASE</version>
    </dependency>

2） 创建目标类

public interface IUserService {
    
        public void add();
    
        public void update();
    
        public void delete();
    
        public void select();
    
    
    }
    
    package com.test.service.impl;
    
    import com.test.service.IUserService;
    import org.springframework.stereotype.Service;
    
    @Service
    public class UserService implements IUserService {
    
        @Override
        public void add() {
            System.out.println("这是添加用户");
        }
    
        @Override
        public void update() {
            System.out.println("这是修改用户");
        }
    
        @Override
        public void delete() {
            System.out.println("这是删除用户");
        }
    
        @Override
        public void select() {
            System.out.println("这是查询用户");
        }
    }

3)创建配置文件 applicationContext-aop-user.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-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/aop
       http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd">
    
    
        
        <context:component-scan base-package="com.test" />
    
    
        
        <aop:aspectj-autoproxy ></aop:aspectj-autoproxy>
    
    </beans>

4)创建切面类 (增强+切点)

//切面类 (增强类+切点)
    @Aspect
    public class UserAdvice {
    
        //定义切点
        @Pointcut("execution(* com..User*.*(..))")
        public void pc()
        {
        }
    
        //在所有包中以user开头的类中所有的方法 成功返回以后 切入 afterReturningMethod()方法
        //@AfterReturning("execution(* com..User*.*(..))")
        @AfterReturning("UserAdvice.pc()")
        public void afterReturningMethod()
        {
            System.out.println("方法执行成功");
        }
    
        //@AfterThrowing("execution(* com..User*.*(..))")
        @AfterThrowing("UserAdvice.pc()")
        public void afterThrowingMethod()
        {
            System.out.println("出异常");
        }
    
        //环绕通知
        @Around("execution(* com..UserDao.select(..))")
        public Object around(ProceedingJoinPoint point) throws Throwable {
              System.out.println("查询所有用户信息");
              return point.proceed();// 等价于userDao.select()
        }
    }

修改配置文件

创建一个切面类对象

<?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-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/aop
       http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd">
    
    
        
        <context:component-scan base-package="com.test" />
    
    
        
      <bean id="userAdvice" class="com.test.aspects.UserAdvice"></bean>
    
        
        <aop:aspectj-autoproxy ></aop:aspectj-autoproxy>
    
    </beans>

6）测试

@Test
    public void fun()
    {
        ClassPathXmlApplicationContext classPathXmlApplicationContext=new ClassPathXmlApplicationContext("/applicationContext-aop-user.xml");
    
        IUserDao userDao= classPathXmlApplicationContext.getBean("userDao",IUserDao.class);
    
        try {
            userDao.add();
        } catch (Exception e) {
            e.printStackTrace();
        }
    
        userDao.select();
    }