Spring Aop注解实现
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Spring-aop-理论知识 Spring-Aop-注解实现 项目结构图
具体步骤：
1、创建maven 项目 导入依赖 创建好项目结构
<dependencies>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.18</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.3.4</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>5.3.4</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.3.4</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>5.3.4</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.3.4</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.6</version>
</dependency>
</dependencies>
2、写一个接口 及 其实现类
public interface TestDao {
public void delete();
}
@Service
public class TestDaoImpl implements TestDao {
public void delete() {
System.out.println("正在执行的方法-->删除");
}
}3、切面类
@Aspect
@Component
public class MyAspectAnnotation {
@Pointcut("execution(* com.dao.*.*(..))")
private void myPointCut(){
}
@Before("myPointCut()")
public void before(JoinPoint jp){
System.out.print("前置通知：模拟权限控制");
System.out.println("目标对象："+jp.getTarget()+",被增强的方法："+jp.getSignature().getName());
}
@AfterReturning("myPointCut()")
public void afterReturning(JoinPoint jp){
System.out.print("后置返回通知："+"模拟删除临时文件");
System.out.println(",被增强的方法"+jp.getSignature().getName());
}
@Around("myPointCut()")
public Object around(ProceedingJoinPoint pjp) throws Throwable {
System.out.println("环绕开始：执行目标方法前，模拟开启事务");
Object obj = pjp.proceed();
System.out.println("环绕结束：执行目标方法后，模拟关闭事务");
return obj;
}
@AfterThrowing(value = "myPointCut()",throwing = "throwable")
public void except(Throwable throwable){
System.out.println("异常通知："+"程序执行异常"+throwable.getMessage());
}
@After("myPointCut()")
public void after(){
System.out.println("最终通知：释放资源");
}
}4、application.xml 文件
<?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.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
<context:component-scan base-package="com.dao"/>
<context:component-scan base-package="com.aspect"/>
<!--启动基于注解的AspectJ支持-->
<aop:aspectj-autoproxy proxy-target-class="true"/>
</beans>测试
@Test
public void Test(){
ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
TestDao testDao = applicationContext.getBean("testDaoImpl", TestDaoImpl.class);
testDao.delete();
}
总结
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