内容简介: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
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>
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