Spring框架——AOP前置、后置、环绕、异常通知
2016-08-05 21:21
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通知类型:
步骤:
1. 定义接口
2. 编写对象(被代理对象=目标对象)
3. 编写通知(前置通知目标方法调用前调用)
4. 在beans.xml文件配置
4.1 配置 被代理对象=目标对象
4.2 配置通知
4.3 配置代理对象 是 ProxyFactoryBean的对象实例
4.3.1 <!-- 代理接口集 -->
4.3.2 织入通知
4.3.3 配置被代理对象
本实例:
1、基本信息:
包名:com.aop
两个接口类:TestServiceInter.java;TestServiceInter2.java
测试类:Test1Service.java实现了上述两个接口
前置通知类:MyMethodBeforeAdvice.java
后置通知类:MyAfterReturningAdvice.java
环绕通知类:MyMethodInterceptor.java
异常通知类:MyThrowsAdvice.java
配置文件:beans.xml
应用操作类:App.java
2、接口类TestServiceInter.java中代码:
package com.aop;
public interface TestServiceInter {
public void sayHello();
}3、接口类TestServiceInter2.java中代码:
package com.aop;
public interface TestServiceInter2 {
public void sayBye();
}4、测试类Test1Service.java中代码:
package com.aop;
public class Test1Service implements TestServiceInter,TestServiceInter2 {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public void sayHello() {
System.out.println("Hello!"+name);
}
public void sayBye() {
// TODO Auto-generated method stub
System.out.println("Bye!"+name);
}
}5、前置通知类MyMethodBeforeAdvice.java中代码:
package com.aop;
import java.lang.reflect.Method;
import org.springframework.aop.MethodBeforeAdvice;
public class MyMethodBeforeAdvice implements MethodBeforeAdvice {
@Override//method:表示被调用的方法,args:给这个方法传递的参数;target:目标对象
public void before(Method method, Object[] args, Object target)
throws Throwable {
// TODO Auto-generated method stub
System.out.println("***************************");
System.out.println("前置通知,记录日志..."+method.getName());
}
}6、后置通知类MyAfterReturningAdvice.java中代码:
package com.aop;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
public class MyMethodInterceptor implements MethodInterceptor {
@Override
public Object invoke(MethodInvocation arg0) throws Throwable {
// TODO Auto-generated method stub
System.out.println("环绕通知,调用环绕方法前...");
Object object=arg0.proceed();
System.out.println("环绕通知,调用环绕方法后...");
return null;
}
}8、异常通知类MyThrowsAdvice.java中的代码:
在代码中设置一个异常即可检验出异常通知,例如int a=9/0异常;
package com.aop;
import java.lang.reflect.Method;
import org.springframework.aop.ThrowsAdvice;
public class MyThrowsAdvice implements ThrowsAdvice {
public void afterThrowing(Method m,Object[] os,Object target,Exception e) {
System.out.println("出异常了..."+e.getMessage());
}
}9、配置文件beans.xml中代码:
package com.aop;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class App {
public static void main(String[] args) {
ApplicationContext ac=new ClassPathXmlApplicationContext("com/aop/beans.xml");
TestServiceInter ts=(TestServiceInter)ac.getBean("proxyFactoryBean1");
TestServiceInter2 ts2=(TestServiceInter2)ts;//转接口
ts.sayHello();
ts2.sayBye();
}
}11、运行结果:
12、项目源码:
http://download.csdn.net/detail/tingzhiyi/9596426
步骤:
1. 定义接口
2. 编写对象(被代理对象=目标对象)
3. 编写通知(前置通知目标方法调用前调用)
4. 在beans.xml文件配置
4.1 配置 被代理对象=目标对象
4.2 配置通知
4.3 配置代理对象 是 ProxyFactoryBean的对象实例
4.3.1 <!-- 代理接口集 -->
4.3.2 织入通知
4.3.3 配置被代理对象
本实例:
1、基本信息:
包名:com.aop
两个接口类:TestServiceInter.java;TestServiceInter2.java
测试类:Test1Service.java实现了上述两个接口
前置通知类:MyMethodBeforeAdvice.java
后置通知类:MyAfterReturningAdvice.java
环绕通知类:MyMethodInterceptor.java
异常通知类:MyThrowsAdvice.java
配置文件:beans.xml
应用操作类:App.java
2、接口类TestServiceInter.java中代码:
package com.aop;
public interface TestServiceInter {
public void sayHello();
}3、接口类TestServiceInter2.java中代码:
package com.aop;
public interface TestServiceInter2 {
public void sayBye();
}4、测试类Test1Service.java中代码:
package com.aop;
public class Test1Service implements TestServiceInter,TestServiceInter2 {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public void sayHello() {
System.out.println("Hello!"+name);
}
public void sayBye() {
// TODO Auto-generated method stub
System.out.println("Bye!"+name);
}
}5、前置通知类MyMethodBeforeAdvice.java中代码:
package com.aop;
import java.lang.reflect.Method;
import org.springframework.aop.MethodBeforeAdvice;
public class MyMethodBeforeAdvice implements MethodBeforeAdvice {
@Override//method:表示被调用的方法,args:给这个方法传递的参数;target:目标对象
public void before(Method method, Object[] args, Object target)
throws Throwable {
// TODO Auto-generated method stub
System.out.println("***************************");
System.out.println("前置通知,记录日志..."+method.getName());
}
}6、后置通知类MyAfterReturningAdvice.java中代码:
package com.aop; import java.lang.reflect.Method; import org.springframework.aop.AfterReturningAdvice; public class MyAfterReturningAdvice implements AfterReturningAdvice { @Override public void afterReturning(Object returnValue, Method method, Object[] args, Object target) throws Throwable { // TODO Auto-generated method stub System.out.println("后置通知,关闭资源..."); } }7、环绕通知类MyMethodInterceptor.java中的代码:
package com.aop;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
public class MyMethodInterceptor implements MethodInterceptor {
@Override
public Object invoke(MethodInvocation arg0) throws Throwable {
// TODO Auto-generated method stub
System.out.println("环绕通知,调用环绕方法前...");
Object object=arg0.proceed();
System.out.println("环绕通知,调用环绕方法后...");
return null;
}
}8、异常通知类MyThrowsAdvice.java中的代码:
在代码中设置一个异常即可检验出异常通知,例如int a=9/0异常;
package com.aop;
import java.lang.reflect.Method;
import org.springframework.aop.ThrowsAdvice;
public class MyThrowsAdvice implements ThrowsAdvice {
public void afterThrowing(Method m,Object[] os,Object target,Exception e) {
System.out.println("出异常了..."+e.getMessage());
}
}9、配置文件beans.xml中代码:
<!-- 1、配置被代理的对象,该对象实现了接口 --> <bean id="test1Service" class="com.aop.Test1Service"> <property name="name" value="小明"/> </bean> <!-- 2、配置前置通知--> <bean id ="myMethodBeforeAdvice" class="com.aop.MyMethodBeforeAdvice" /> <!-- 配置后置通知 --> <bean id="myAfterReturningAdvice" class="com.aop.MyAfterReturningAdvice"/> <!-- 配置环绕通知 --> <bean id="myMethodInterceptor" class="com.aop.MyMethodInterceptor"/> <!-- 配置异常通知 --> <bean id="myThrowsAdvice" class="com.aop.MyThrowsAdvice"/> <!-- 定义前置通知的切入点 --> <bean id="myMethodBeforeAdviceFilter" class="org.springframework.aop.support.NameMatchMethodPointcutAdvisor"> <property name="advice" ref="myMethodBeforeAdvice" /> <property name="mappedNames"> <value>sayHello</value> </property> </bean> <!-- 3、配置代理对象,spring提供 --> <bean id="proxyFactoryBean1" class="org.springframework.aop.framework.ProxyFactoryBean"> <!-- 3.1、配置代理接口集--> <property name="proxyInterfaces"> <list> <value>com.aop.TestServiceInter</value> <value>com.aop.TestServiceInter2</value> </list> </property> <!-- 3.2、把通知织入到代理对象 --> <property name="interceptorNames"> <list> <!-- 相当于把前置通知和代理对象关联起来,可以把通知看成拦截器 --> <!-- 使用自定义切入点来控制前置通知 --> <!-- <value>myMethodBeforeAdviceFilter</value> --> <!-- 织入前置通知 --> <value>myMethodBeforeAdvice</value> <!-- 织入后置通知 --> <value>myAfterReturningAdvice</value> <!-- 织入环绕通知 --> <value>myMethodInterceptor</value> <!-- 织入异常通知 --> <value>myThrowsAdvice</value> </list> </property> <!-- 3.3、配置被代理对象 ,可以指定--> <property name="target" ref="test1Service"/> </bean>10、应用操作类App.java中代码:
package com.aop;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class App {
public static void main(String[] args) {
ApplicationContext ac=new ClassPathXmlApplicationContext("com/aop/beans.xml");
TestServiceInter ts=(TestServiceInter)ac.getBean("proxyFactoryBean1");
TestServiceInter2 ts2=(TestServiceInter2)ts;//转接口
ts.sayHello();
ts2.sayBye();
}
}11、运行结果:
12、项目源码:
http://download.csdn.net/detail/tingzhiyi/9596426
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