Spring Aspectj
文档
https://docs.spring.io/spring/docs/4.2.x/spring-framework-reference/html/xsd-configuration.html
Maven
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ming</groupId>
<artifactId>mingming111</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>mingming111 Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.1.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>5.1.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.1.7.RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.annotation</groupId>
<artifactId>jsr250-api</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>5.1.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.1.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.10.RELEASE</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>RELEASE</version>
<scope>test</scope>
</dependency>
<!-- AOP -->
<dependency>
<groupId>aopalliance</groupId>
<artifactId>aopalliance</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.1.7.RELEASE</version>
</dependency>
<!-- aspectj -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.10</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>5.1.8.RELEASE</version>
</dependency>
</dependencies>
<build>
<finalName>mingming111</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
启用注解
<?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: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 definitions here -->
<!-- 开启aspectj注解 开发-->
<aop:aspectj-autoproxy/>
</beans>
通知类型
前置通知 beforeadvice 使用权限校验
后置通知 日志记录，，使用后置通知
环绕通知 目标方法执行之前，之后执行的操作 可以阻止执行目标方法 进行事物管理，，使用环绕通知。
最终通知 final
引介通知
execution函数 访问修饰符 返回类型 方法名 参数 异常
匹配类的public方法
匹配所有类的public方法
execution(public * *(..))
匹配public修饰符 返回类型为任意 方法名为任意 参数为任意
匹配包下的所有类方法
execution(* com.ming.dao.*(..))
匹配包下的所有类的方法 不包含子包
返回类型为任意，方法为com.ming.dao下的第一级的方法
子包 子包下的所有类
execution(* com.ming.dao.. *(..))
匹配指定类下的所有方法
execution(* com.ming.dao.*(..))
匹配实现特定接口的所有方法
execution(* com.ming.dao+.*(..))
+代表实现了该接口的所有方法
匹配所有save开头的方法
execution(* save*(..))
任意的返回值 save开头
入门案例
package com.ming;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
/**
* 切面类
* @author ming
*/
@Aspect
public class MyAspectDao {
@Before(value="execution(* com.ming.ProductDao.save(..))")
public void before(){
System.out.println("前置通知");
}
}
package com.ming;
public class ProductDao {
public void save(){
System.out.println("保存");
}
public void update(){
System.out.println("update");
}
public void delete(){
System.out.println("delete");
}
public void findOne(){
System.out.println("findOne");
}
public void findAll(){
System.out.println("findAll");
}
}
<?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: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 definitions here -->
<!-- 开启aspectj注解 开发-->
<aop:aspectj-autoproxy/>
<!-- 目标类 -->
<bean id="productDao" class="com.ming.ProductDao"/>
<!-- 定义切面 -->
<bean class="com.ming.MyAspectDao"/>
</beans>
package com.ming;
import org.aspectj.lang.annotation.Aspect;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import static org.junit.Assert.*;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class ProductDaoTest {
@Autowired
private ProductDao productDao;
@Before
public void setUp() throws Exception {
}
@After
public void tearDown() throws Exception {
}
@Test
public void save() {
productDao.save();
}
@Test
public void update() {
productDao.update();
}
@Test
public void delete() {
productDao.delete();
}
@Test
public void findOne() {
productDao.findOne();
}
@Test
public void findAll() {
productDao.findAll();
}
}
对
com.ming.ProductDao.save
进行拦截，添加前置通知
前置通知
获得切点信息
package com.ming;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
/**
* 切面类
* @author ming
*/
@Aspect
public class MyAspectDao {
@Before(value="execution(* com.ming.ProductDao.save(..))")
public void before(JoinPoint joinPoint){
System.out.println("前置通知" + joinPoint);
}
}
后置通知
在执行之后执行通知
package com.ming;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
/**
* 切面类
* @author ming
*/
@Aspect
public class MyAspectDao {
@Before(value="execution(* com.ming.ProductDao.save(..))")
public void before(JoinPoint joinPoint){
System.out.println("前置通知" + joinPoint);
}
@AfterReturning(value = "execution(* com.ming.ProductDao.save(..))", returning = "res")
public void afterReturing(Object res){
System.out.println("后置通知" + res);
}
}
环绕通知
使用@Around注解
如果不调用，直接被拦截
@Around(value="execution(* com.ming.ProductDao.save(..))")
public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
System.out.println("环绕前 通知");
Object obj = joinPoint.proceed();
System.out.println("环绕否通知");
return obj;
}
异常抛出
设置@AfterThrowing 设置发生异常的参数
After 最终通知
使用@After注解
最终通知在后置通知之前
Pointcut
package com.ming;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
/**
* 切面类
* @author ming
*/
@Aspect
public class MyAspectDao {
@Before(value="myPointcutj()")
public void before(JoinPoint joinPoint){
System.out.println("前置通知" + joinPoint);
}
@AfterReturning(value = "execution(* com.ming.ProductDao.save(..))", returning = "res")
public void afterReturing(Object res){
System.out.println("后置通知" + res);
}
@Around(value="execution(* com.ming.ProductDao.save(..))")
public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
System.out.println("环绕前 通知");
Object obj = joinPoint.proceed();
System.out.println("环绕否通知");
return obj;
}
@After(value="execution(* com.ming.ProductDao.save(..))")
public void after(){
System.out.println("最终通知");
}
@Pointcut(value="execution(* com.ming.ProductDao.save(..))")
private void myPointcutj(){
}
}
基于XML开发
<?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: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 definitions here -->
<!-- 配置目标类 -->
<bean id="customerDao" class="com.ming.CustomerDaoImpl"/>
<!-- 配置切面类 -->
<bean class="com.ming.MyAspectXml" id="myAspectXml"/>
<!-- AOP配置 -->
<aop:config>
<!-- 配置切入点 -->
<aop:pointcut id="pointcuti" expression="execution(* com.ming.CustomerDao.save(..))"/>
<!-- 切面 -->
<aop:aspect ref="myAspectXml">
<!-- 配置前置通知 -->
<aop:before method="before" pointcut-ref="pointcuti"/>
</aop:aspect>
</aop:config>
</beans>
正文到此结束
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