方法一 使用API接口实现(每个方法都需要配置aop约束)
Log.java
import org.springframework.aop.MethodBeforeAdvice; import java.lang.reflect.Method; public class Log implements MethodBeforeAdvice { //method 要执行的目标对象的方法 //args:参数 //target:目标代码 @Override public void before(Method method, Object[] objects, Object o) throws Throwable { System.out.println(o.getClass().getName()+"的"+method.getName()+"被执行了"); } }
After.java
import org.springframework.aop.AfterReturningAdvice; import java.lang.reflect.Method; public class AfterLog implements AfterReturningAdvice { @Override public void afterReturning(Object o, Method method, Object[] objects, Object o1) throws Throwable { System.out.println("执行了"+method.getName()+"方法,返回结果为:"+o); } }
UserService接口类和UserServiceImpl.java(三个方法都是从用这个)
public interface Userservice { public void add(); public void delete(); public void update(); public void query(); } ------------------------------------------------------- public class UserServiceImpl implements Userservice{ @Override public void add() { System.out.println("add了一个用户"); } @Override public void delete() { System.out.println("delete了一个用户"); } @Override public void update() { System.out.println("update了一个用户"); } @Override public void query() { System.out.println("query了一个用户"); } }
applicationContext.xml
<?xml version="1.0" encoding="UTF8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 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/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <bean id="userService" class="com.zxy.service.UserServiceImpl"/> <bean id="log" class="com.zxy.log.Log"/> <bean id="afterlog" class="com.zxy.log.AfterLog"/> <!-- 配置AOP 配置约束 --> <!-- 方法一 使用API接口实现--> <aop:config> <!-- 切入点 --> <aop:pointcut id="pointcut" expression="execution(* com.zxy.service.UserServiceImpl.*(..))"/> <aop:advisor advice-ref="log" pointcut-ref="pointcut"/> <aop:advisor advice-ref="afterlog" pointcut-ref="pointcut"/> </aop:config>
方法二 自定义切面
DiyPointCut.java
public class DiyPointCut { public void before(){ System.out.println("========方法执行前=========="); } public void after(){ System.out.println("========方法执行后=========="); } }
applicationContext.xml
<bean id="diy" class="com.zxy.diy.DiyPointCut"/> <aop:config> <aop:aspect ref="diy"> <aop:pointcut id="point" expression="execution(* com.zxy.service.UserServiceImpl.*(..))"/> <aop:before method="before" pointcut-ref="point"/> <aop:after method="after" pointcut-ref="point"/> </aop:aspect> </aop:config>
方法三 注解开发
AnnotationPointCut.java
import org.aspectj.lang.annotation.After; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before; @Aspect public class AnnotationPointCut { @Before("execution(* com.zxy.service.UserServiceImpl.*(..))") public void before(){ System.out.println("=====方法执行前========="); } @After("execution(* com.zxy.service.UserServiceImpl.*(..))") public void after(){ System.out.println("=====方法执行后========="); } }
applicationContext.xml
<!-- 方式三 使用注解 --> <bean id="annotationPointCut" class="com.zxy.diy.AnnotationPointCut"/> <!-- 开启注解支持 --> <aop:aspectj-autoproxy/>
公共测试类:
import com.zxy.service.Userservice; import org.springframework.context.support.ClassPathXmlApplicationContext; public class MyTest { public static void main(String[] args) { ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); //代理的是接口 Userservice userService = (Userservice) context.getBean("userService"); userService.add(); } }
标签:Spring,void,System,三种,AOP,println,import,public,out From: https://www.cnblogs.com/kidzxy/p/16842183.html