SpringAOP之通过注解方式实现

通过注解的方式
1）导入jar包

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<!-- Spring --> <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>       <!-- 配置servlet--> <dependency>   <groupId>javax.servlet</groupId>   <artifactId>javax.servlet-api</artifactId>   <version>3.1.0</version>   <scope>provided</scope> </dependency>   <!--配置jsp的依赖 --> <dependency>   <groupId>javax.servlet.jsp</groupId>   <artifactId>jsp-api</artifactId>   <version>2.2</version>   <scope>provided</scope> </dependency>   <!-- 配置jstl --> <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>   <!-- 配置的 spring-jdbc --> <dependency>   <groupId>org.springframework</groupId>   <artifactId>spring-jdbc</artifactId>   <version>4.1.3.RELEASE</version> </dependency>   <!-- 事务相关的架包 --> <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>       <!-- aop --> <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

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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

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<?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">         <!-- 扫描注解所在的位置 -->     <context:component-scan base-package="com.test" />         <!-- 使用aop注解方式-->     <aop:aspectj-autoproxy ></aop:aspectj-autoproxy>   </beans>

　　

4)创建切面类 (增强+切点)

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//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

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<?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">         <!-- 扫描注解所在的位置 -->     <context:component-scan base-package="com.test" />         <!-- 创建切面类对象-->   <bean id="userAdvice" class="com.test.aspects.UserAdvice"></bean>       <!-- 使用aop注解方式-->     <aop:aspectj-autoproxy ></aop:aspectj-autoproxy>   </beans>

　　

6）测试

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@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(); }pring