spring boot之aop常用的两种拦截方式(3)

普通方式：

package com.zh.ch1.aop;

import org.springframework.stereotype.Service;

@Service
public class DemoMethodService {
public void add(){
System.out.println(".....task...");
}
}

注解方式：

package com.zh.ch1.aop;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* 自定义java 注解
* METHOD：作用于方法上
* 该注解应用范围：RUNTIME
* @author Hiiso
*
*/
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Action {
String name();
}

package com.zh.ch1.aop;

import org.springframework.stereotype.Service;

@Service
public class DemoAnnotationService {
/**
* 使用@Action注解
*/
@Action(name = "addUser!")
public void addUser() {
}
}

aop配置：

package com.zh.ch1.aop;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;

@Configuration
@ComponentScan("com.zh.ch1.aop")
@EnableAspectJAutoProxy //1
public class AopConfig {

}

package com.zh.ch1.aop;

import java.lang.reflect.Method;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

@Aspect // 1：通过改注解声明一个切面
@Component // 2让切面称为spring管理的bean
public class LogAspect {

@Pointcut("@annotation(com.zh.ch1.aop.Action)") // 3：该注解声明切入点
public void annotationPointCut() {
};
//注解
/*@After("annotationPointCut()") // 4:使用刚声明的切入点(annotationPointCut())
public void after(JoinPoint joinPoint) {
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
Method method = signature.getMethod();
Action action = method.getAnnotation(Action.class);
System.out.println("注解式拦截 " + action.name()); // 5：通过反射获取注解的属性值
}*/

//切面
@After("execution(* com.zh.ch1.aop.*.*(..))") //6:直接拦截方法名
public void before(JoinPoint joinPoint){
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
Method method = signature.getMethod();
System.out.println("方法规则式拦截,"+method.getName());

}
}

package com.zh.ch1.aop;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class Main {
public static void main(String[] args) {
AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(AopConfig.class); // 1
//注解
DemoAnnotationService demoAnnotationService = context.getBean(DemoAnnotationService.class);
demoAnnotationService.addUser();

//切面
DemoMethodService demoMethodService = context.getBean(DemoMethodService.class);
demoMethodService.add();
context.close();
}

}

拦截规则设置：execution(* com.zh.ch1.aop.*.*(..))

方法规则式拦截,addUser

15:00:35.468 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'demoMethodService'

.....task...

方法规则式拦截,add