spring aop的使用（註解方式以及基於xml配置方式）
阿新 • • 發佈：2019-02-10
註解方式
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beans.xml
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<?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: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-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd "> <aop:aspectj-autoproxy/> <bean id="myInterceptor" class="blog.service.MyInterceptor"/> <bean id="personService" class="blog.service.impl.PersonServiceBean"></bean> </beans>
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MyInterceptor.java
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package blog.service; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.After; import org.aspectj.lang.annotation.AfterReturning; import org.aspectj.lang.annotation.AfterThrowing; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before; import org.aspectj.lang.annotation.Pointcut; /** * 切面 * */ @Aspect public class MyInterceptor { @Pointcut("execution (* blog.service.impl.PersonServiceBean.*(..))") public void anyMethod() { //表示式解釋：* blog.service.impl.PersonServiceBean.*(..):第一個*號表示返回型別； //blog.service.impl.PersonServiceBean.*：表示PersonServiceBean類下的所有方法 //blog.service.impl..*.*：表示blog.service.impl包及其子包下的所有類的所有方法 //(..):表示所有的引數型別幾個數都不限 }// 宣告一個切入點 //會攔截引數簽名位 (String , int)或(String , Integer )型別的方法， //引數順序與args(uname,id)一致，引數型別由(int id,String uname)決定 @Before("anyMethod() && args(uname,id)") public void doAccessCheck(int id,String uname) { System.out.println("前置通知:" + uname + id); } @AfterReturning(pointcut="anyMethod()",returning="result") public void doAfterReturning(String result) { System.out.println("後置通知:" + result); } @After("anyMethod()") public void doAfter() { System.out.println("最終通知"); } @AfterThrowing(pointcut="anyMethod()",throwing="e") public void doAfterThrowing(Exception e) { System.out.println("例外通知:" + e.getMessage()); } @Around("anyMethod()") public Object doBasicProfiling(ProceedingJoinPoint pjp) throws Throwable{ //if(){//判斷使用者是否有許可權 System.out.println("進入方法"); Object result = pjp.proceed(); System.out.println("退出方法"); //} return result; } }
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PersonService.java
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package blog.service;
public interface PersonService {
public String save(String name);
public String update(String name,Integer userId);
public String delete(int id,String dept);
}
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PersonServiceBean.java
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package blog.service.impl; import blog.service.PersonService; public class PersonServiceBean implements PersonService { private String username = null; public String getUsername() { return username; } public PersonServiceBean() { } public PersonServiceBean(String username) { this.username = username; } @Override public String save(String name) { if (name.equals("") || name == null) { throw new RuntimeException("出錯啦"); } System.out.println("in save method!" + name); return "in save method!" + name; } @Override public String update(String name, Integer userId) { System.out.println("in update method! name = " + name + " id = " + userId + " username = " + username); return "in update method!name = " + name + " id = " + userId; } @Override public String delete(int id, String dept) { System.out.println("id = " + id + " dept = " + dept); return "in delete method! + nameid = " + id + " dept = " + dept; } }
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SpringAOPTest.java
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package junitTest;
import org.junit.BeforeClass;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import blog.service.PersonService;
public class SpringAOPTest {
@BeforeClass
public static void setUpBeforeClass() throws Exception {
}
@Test
public void AopTest(){
ApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");
PersonService service = (PersonService)ctx.getBean("personService");
try {
service.delete(12, "it");
service.update("發多個地方",324);
service.save("");
} catch (Exception e) {
e.printStackTrace();
}
}
}
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執行結果
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基於xml配置方式
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beans.xml
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<?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: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-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
">
<aop:aspectj-autoproxy/>
<bean id="myInterceptor" class="blog.service.MyInterceptor"/>
<bean id="personService" class="blog.service.impl.PersonServiceBean"></bean>
<aop:config>
<aop:aspect id="aspectBean" ref="myInterceptor" >
<aop:pointcut id="point" expression="execution (!void blog.service.impl.PersonServiceBean.*(..))"/>
<aop:before method="doAccessCheck" pointcut-ref="point" />
<aop:after-returning method="doAfterReturning" pointcut-ref="point" />
<aop:after-throwing method="doAfterThrowing" pointcut-ref="point"/>
<aop:after method="doAfter" pointcut-ref="point"/>
<aop:around method="doBasicProfiling" pointcut-ref="point" />
</aop:aspect>
</aop:config>
</beans>*******************
MyInterceptor.java
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package blog.service;
import org.aspectj.lang.ProceedingJoinPoint;
public class MyInterceptor {
public void anyMethod() {
}
public void doAccessCheck() {
System.out.println("前置通知" );
}
public void doAfterReturning() {
System.out.println("後置通知");
}
public void doAfter() {
System.out.println("最終通知");
}
public void doAfterThrowing() {
System.out.println("例外通知");
}
public Object doBasicProfiling(ProceedingJoinPoint pjp) throws Throwable{
//if(){//判斷使用者是否有許可權
System.out.println("進入方法");
Object result = pjp.proceed();
System.out.println("退出方法");
//}
return result;
}
}
aop表示式的使用方法
<aop:pointcut id="point" expression="execution (!void blog.service.impl.PersonServiceBean.*(..))"/>
!void blog.service.impl.PersonServiceBean.*(..)中!void 表示攔截所有返回型別為非void型別的方法
java.lang.String表示攔截所有返回型別為String型別的方法
* blog.service.impl.PersonServiceBean.*(java.lang.String,..)表示攔截所有第一個引數為String型別的方法