AOP通知类型
前置通知
在目标方法执行之前进行操作
UserDao.java
public class UserDao {
public void add(){
System.out.println("添加用户");
}
}
切面类 MyAspect.java
public class MyAspect {
public void check(){
System.out.println("权限校验");
}
}
applicationContext.xml 配置:
<?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 id="userDao" class="com.xzh.spring.demo4.UserDao"/>
<bean id="myAspect" class="com.xzh.spring.demo4.MyAspect"/>
<!--配置AOP-->
<aop:config>
<!--切点:给那个方法做增强-->
<aop:pointcut id="point1" expression="execution(* com.xzh.spring.demo4.UserDao.add(..))"/>
<!--配置切面:增强的功能是什么-->
<aop:aspect ref="myAspect">
<!--前置通知-->
<aop:before method="check" pointcut-ref="point1"/>
</aop:aspect>
</aop:config>
</beans>
AOP测试:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class AopTest {
@Resource(name = "userDao")
private UserDao userDao;
@Test
public void test() {
this.userDao.add();
}
}
后置通知
在目标方法执行之后 进行操作
UserDao.java
public class UserDao {
public void add(){
System.out.println("添加用户");
}
public void update(){
System.out.println("更新用户");
}
}
切面类 MyAspect.java
public class MyAspect {
public void check(){
System.out.println("权限校验");
}
public void log(){
System.out.println("日志记录");
}
}
applicationContext.xml 配置:
<?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 id="userDao" class="com.xzh.spring.demo4.UserDao"/>
<bean id="myAspect" class="com.xzh.spring.demo4.MyAspect"/>
<!--配置AOP-->
<aop:config>
<!--切点:给那个方法做增强-->
<aop:pointcut id="point1" expression="execution(* com.xzh.spring.demo4.UserDao.add(..))"/>
<aop:pointcut id="point2" expression="execution(* com.xzh.spring.demo4.UserDao.update(..))"/>
<!--配置切面:增强的功能是什么-->
<aop:aspect ref="myAspect">
<!--前置通知-->
<aop:before method="check" pointcut-ref="point1"/>
<!--后置通知-->
<aop:after-returning method="log" pointcut-ref="point2"/>
</aop:aspect>
</aop:config>
</beans>
AOP测试:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class AopTest {
@Resource(name = "userDao")
private UserDao userDao;
@Test
public void test() {
this.userDao.update();
}
}
后置通知获取切入点的返回值
UserDao.java
public class UserDao {
public void add(){
System.out.println("添加用户");
}
public String update(){
System.out.println("更新用户");
return "更新成功!";
}
}
切面类 MyAspect.java
public class MyAspect {
public void check(){
System.out.println("权限校验");
}
public void log(Object res){
System.out.println("日志记录:" + res);
}
}
applicationContext.xml 配置:
<?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 id="userDao" class="com.xzh.spring.demo4.UserDao"/>
<bean id="myAspect" class="com.xzh.spring.demo4.MyAspect"/>
<!--配置AOP-->
<aop:config>
<!--切点:给那个方法做增强-->
<aop:pointcut id="point1" expression="execution(* com.xzh.spring.demo4.UserDao.add(..))"/>
<aop:pointcut id="point2" expression="execution(* com.xzh.spring.demo4.UserDao.update(..))"/>
<!--配置切面:增强的功能是什么-->
<aop:aspect ref="myAspect">
<!--前置通知-->
<aop:before method="check" pointcut-ref="point1"/>
<!--后置通知-->
<aop:after-returning method="log" pointcut-ref="point2" returning="res"/>
</aop:aspect>
</aop:config>
</beans>
AOP测试:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class AopTest {
@Resource(name = "userDao")
private UserDao userDao;
@Test
public void test() {
this.userDao.update();
}
}
环绕通知
在目标方法执行之前 和之后进行操作
UserDao.java
public class UserDao {
public void add(){
System.out.println("添加用户");
}
public String update(){
System.out.println("更新用户");
return "更新成功!";
}
public void delete(){
System.out.println("删除用户");
}
}
切面类 MyAspect.java
public class MyAspect {
public void check(){
System.out.println("权限校验");
}
public void log(Object res){
System.out.println("日志记录:" + res);
}
public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
System.out.println("开启事务");
Object proceed = joinPoint.proceed();
System.out.println("提交事务");
return proceed;
}
}
applicationContext.xml 配置:
<?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 id="userDao" class="com.xzh.spring.demo4.UserDao"/>
<bean id="myAspect" class="com.xzh.spring.demo4.MyAspect"/>
<!--配置AOP-->
<aop:config>
<!--切点:给那个方法做增强-->
<aop:pointcut id="point1" expression="execution(* com.xzh.spring.demo4.UserDao.add(..))"/>
<aop:pointcut id="point2" expression="execution(* com.xzh.spring.demo4.UserDao.update(..))"/>
<aop:pointcut id="point3" expression="execution(* com.xzh.spring.demo4.UserDao.delete(..))"/>
<!--配置切面:增强的功能是什么-->
<aop:aspect ref="myAspect">
<!--前置通知-->
<aop:before method="check" pointcut-ref="point1"/>
<!--后置通知-->
<aop:after-returning method="log" pointcut-ref="point2" returning="res"/>
<!--环绕通知-->
<aop:around method="around" pointcut-ref="point3"/>
</aop:aspect>
</aop:config>
</beans>
AOP测试:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class AopTest {
@Resource(name = "userDao")
private UserDao userDao;
@Test
public void test() {
this.userDao.delete();
}
}
异常抛出通知
在程序出现异常时进行操作
UserDao.java
public class UserDao {
public void add(){
System.out.println("添加用户");
}
public String update(){
System.out.println("更新用户");
return "更新成功!";
}
public void delete(){
System.out.println("删除用户");
}
public void find(){
System.out.println("查找用户");
int i = 1 / 0;
}
}
切面类 MyAspect.java
public class MyAspect {
public void check(){
System.out.println("权限校验");
}
public void log(Object res){
System.out.println("日志记录:" + res);
}
public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
System.out.println("开启事务");
Object proceed = joinPoint.proceed();
System.out.println("提交事务");
return proceed;
}
public void exceptionMethod(){
System.out.println("有异常");
}
}
applicationContext.xml 配置:
<?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 id="userDao" class="com.xzh.spring.demo4.UserDao"/>
<bean id="myAspect" class="com.xzh.spring.demo4.MyAspect"/>
<!--配置AOP-->
<aop:config>
<!--切点:给那个方法做增强-->
<aop:pointcut id="point1" expression="execution(* com.xzh.spring.demo4.UserDao.add(..))"/>
<aop:pointcut id="point2" expression="execution(* com.xzh.spring.demo4.UserDao.update(..))"/>
<aop:pointcut id="point3" expression="execution(* com.xzh.spring.demo4.UserDao.delete(..))"/>
<aop:pointcut id="point4" expression="execution(* com.xzh.spring.demo4.UserDao.find(..))"/>
<!--配置切面:增强的功能是什么-->
<aop:aspect ref="myAspect">
<!--前置通知-->
<aop:before method="check" pointcut-ref="point1"/>
<!--后置通知-->
<aop:after-returning method="log" pointcut-ref="point2" returning="res"/>
<!--环绕通知-->
<aop:around method="around" pointcut-ref="point3"/>
<!--异常抛出通知-->
<aop:after-throwing method="exceptionMethod" pointcut-ref="point4"/>
</aop:aspect>
</aop:config>
</beans>
AOP测试:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class AopTest {
@Resource(name = "userDao")
private UserDao userDao;
@Test
public void test() {
this.userDao.find();
}
}
异常抛出通知获取异常信息
UserDao.java
public class UserDao {
public void add(){
System.out.println("添加用户");
}
public String update(){
System.out.println("更新用户");
return "更新成功!";
}
public void delete(){
System.out.println("删除用户");
}
public void find(){
System.out.println("查找用户");
int i = 1 / 0;
}
}
切面类 MyAspect.java
public class MyAspect {
public void check(){
System.out.println("权限校验");
}
public void log(Object res){
System.out.println("日志记录:" + res);
}
public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
System.out.println("开启事务");
Object proceed = joinPoint.proceed();
System.out.println("提交事务");
return proceed;
}
public void exceptionMethod(Throwable ex){
System.out.println("有异常:" + ex.getMessage());
}
}
applicationContext.xml 配置:
<?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 id="userDao" class="com.xzh.spring.demo4.UserDao"/>
<bean id="myAspect" class="com.xzh.spring.demo4.MyAspect"/>
<!--配置AOP-->
<aop:config>
<!--切点:给那个方法做增强-->
<aop:pointcut id="point1" expression="execution(* com.xzh.spring.demo4.UserDao.add(..))"/>
<aop:pointcut id="point2" expression="execution(* com.xzh.spring.demo4.UserDao.update(..))"/>
<aop:pointcut id="point3" expression="execution(* com.xzh.spring.demo4.UserDao.delete(..))"/>
<aop:pointcut id="point4" expression="execution(* com.xzh.spring.demo4.UserDao.find(..))"/>
<!--配置切面:增强的功能是什么-->
<aop:aspect ref="myAspect">
<!--前置通知-->
<aop:before method="check" pointcut-ref="point1"/>
<!--后置通知-->
<aop:after-returning method="log" pointcut-ref="point2" returning="res"/>
<!--环绕通知-->
<aop:around method="around" pointcut-ref="point3"/>
<!--异常抛出通知-->
<aop:after-throwing method="exceptionMethod" pointcut-ref="point4" throwing="ex"/>
</aop:aspect>
</aop:config>
</beans>
AOP测试:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class AopTest {
@Resource(name = "userDao")
private UserDao userDao;
@Test
public void test() {
this.userDao.find();
}
}
最终通知
无论代码是否有异常,都会执行
UserDao.java
public class UserDao {
public void add(){
System.out.println("添加用户");
}
public String update(){
System.out.println("更新用户");
return "更新成功!";
}
public void delete(){
System.out.println("删除用户");
}
public void find(){
System.out.println("查找用户");
int i = 1 / 0;
}
}
切面类 MyAspect.java
public class MyAspect {
public void check(){
System.out.println("权限校验");
}
public void log(Object res){
System.out.println("日志记录:" + res);
}
public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
System.out.println("开启事务");
Object proceed = joinPoint.proceed();
System.out.println("提交事务");
return proceed;
}
public void exceptionMethod(Throwable ex){
System.out.println("有异常:" + ex.getMessage());
}
public void after(){
System.out.println("最终通知");
}
}
applicationContext.xml 配置:
<?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 id="userDao" class="com.xzh.spring.demo4.UserDao"/>
<bean id="myAspect" class="com.xzh.spring.demo4.MyAspect"/>
<!--配置AOP-->
<aop:config>
<!--切点:给那个方法做增强-->
<aop:pointcut id="point1" expression="execution(* com.xzh.spring.demo4.UserDao.add(..))"/>
<aop:pointcut id="point2" expression="execution(* com.xzh.spring.demo4.UserDao.update(..))"/>
<aop:pointcut id="point3" expression="execution(* com.xzh.spring.demo4.UserDao.delete(..))"/>
<aop:pointcut id="point4" expression="execution(* com.xzh.spring.demo4.UserDao.find(..))"/>
<!--配置切面:增强的功能是什么-->
<aop:aspect ref="myAspect">
<!--前置通知-->
<aop:before method="check" pointcut-ref="point1"/>
<!--后置通知-->
<aop:after-returning method="log" pointcut-ref="point2" returning="res"/>
<!--环绕通知-->
<aop:around method="around" pointcut-ref="point3"/>
<!--异常抛出通知-->
<aop:after-throwing method="exceptionMethod" pointcut-ref="point4" throwing="ex"/>
<!--最终通知-->
<aop:after method="after" pointcut-ref="point4"/>
</aop:aspect>
</aop:config>
</beans>
AOP测试:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class AopTest {
@Resource(name = "userDao")
private UserDao userDao;
@Test
public void test() {
this.userDao.find();
}
}