标签:六种 Spring void System bean aop println public out
请先了解: 基于xml的基本使用
接口:CustomerService.java
public interface CustomerService {
//保存
public void customerSave();
//查询
public int customerFind();
}
实现类:CustomerServiceImpl.java
@Service("customerService") //【相当于spring容器中定义:<bean id="customerService" class="com.alilaoye.···.CustomerServiceImpl"/>】
public class CustomerServiceImpl implements CustomerService {
@Override
public void customerSave() {
System.out.println("客户保存...");
}
@Override
public int customerFind() {
System.out.println("客户查询...");
return 0;
}
}
类:ProductService.java
@Service("productService") //【相当于spring容器中定义:<bean id="productService" class="com.alilaoye.···.productService"/>】
public class ProductService {
public void productSave() {
System.out.println("商品保存...");
}
public int productFind() {
System.out.println("商品查询...");
return 0;
}
}
类:AfterThrowingService.java
@Service("afterThrowing")
public class AfterThrowingService {
public void throwing() {
System.out.println("准备异常...");
int num=1/0;
}
}
类:MyAspect.java
@Component("myAspect")
@Aspect //将该类标识为切面类(这里面有方法进行增强),相当于<aop:aspect ref=”myAspect”>
public class MyAspect {
@Before("bean(*Service)")
public void before1(JoinPoint joinPoint){
System.out.println("=======前置通知1=======");
}
//自定义切入点
//方法名就是切入点的名字
//相当于<aop:pointcut expression="bean(*Service)" id="myPointcut"/>
@Pointcut("bean(customerService)")
private void myPointcut(){}
//自定义切入点
//方法名就是切入点的名字
//相当于<aop:pointcut expression="bean(*Service)" id="myPointcut2"/>
@Pointcut("bean(productService)")
private void myPointcut2(){}
//前置通知
//相当于:<aop:before method="before" pointcut-ref="myPointcut"/>
//相当于:<aop:before method="before" pointcut-ref="myPointcut2"/>
@Before("myPointcut()||myPointcut2()")
public void before2(JoinPoint joinPoint){
System.out.println("=======前置通知2=======");
}
//后置通知 对customerService
@AfterReturning(value="bean(customerService)",returning="returnVal")
public void afterReturning(JoinPoint joinPoint,Object returnVal){
System.out.println("=======后置通知=======");
}
//环绕通知 对productService
@Around("bean(productService)")
public Object around(ProceedingJoinPoint proceedingJoinPoint) throws Throwable{
System.out.println("=======环绕通知=======前");
Object object = proceedingJoinPoint.proceed();
System.out.println("=======环绕通知=======后");
return object;
}
//抛出通知
@AfterThrowing(value="bean(afterThrowing)",throwing="ex")
public void afterThrowing(JoinPoint joinPoint ,Throwable ex){
System.out.println("=======抛出通知======="+"抛出的异常信息:"+ex.getMessage());
}
//最终通知
//拦截所有以ing结尾的bean
@After("bean(*ing)")
public void after(JoinPoint joinPoint){
System.out.println("=======最终通知=======");
}
}
配置文件:applicationContext-annotation.xml
<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
http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 1.确定目标 -->
<!-- 扫描bean组件 -->
<context:component-scan base-package="com.alilaoye.demo13_annotation_advice"/>
<!-- 3.配置aop的aspectj的自动代理:
自动扫描bean组件中,含有@Aspect的bean,将其作为aop管理,开启动态代理 -->
<aop:aspectj-autoproxy/>
</beans>
测试类:SpringTest.java
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext-annotation.xml")
public class SpringTest {
//注入要测试bean
@Autowired
private CustomerService customerService;
@Autowired
private ProductService productService;
@Autowired
private AfterThrowingService afterThrowingService;
//测试
@Test
public void test(){
//基于接口
customerService.customerSave();
customerService.customerFind();
//基于类的
productService.productSave();
productService.productFind();
afterThrowingService.throwing();
}
}
效果:
标签:六种,Spring,void,System,bean,aop,println,public,out 来源: https://blog.csdn.net/weixin_42396239/article/details/112364098
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