使用CGlib实现AOP功能

直接上代码了。

实现类

 1 package com.cglib.service.impl;
 2 
 3 public class AopServiceImpl {
 4 
 5     private String user = null;
 6 
 7     public String getUser() {
 8         return user;
 9     }
10 
11     public void setUser(String user) {
12         this.user = user;
13     }
14 
15     public AopServiceImpl() {
16     }
17 
18     public AopServiceImpl(String user) {
19         this.user = user;
20     }
21     
22     public void save() {
23         System.out.println("调用了save()方法");
24     }
25 }

CGlib工厂类

 1 package com.cglib.factory;
 2 
 3 import java.lang.reflect.Method;
 4 
 5 import com.cglib.service.impl.AopServiceImpl;
 6 
 7 import net.sf.cglib.proxy.Enhancer;
 8 import net.sf.cglib.proxy.MethodInterceptor;
 9 import net.sf.cglib.proxy.MethodProxy;
10 
11 public class CGlibFactory implements MethodInterceptor {
12 
13     private Object targetObject = null;
14 
15     public Object creatObjectIntance(Object targetObject) {
16         this.targetObject = targetObject;
17         Enhancer enhancer = new Enhancer();
18         //设置父类
19         enhancer.setSuperclass(this.targetObject.getClass());
20         //设置回调函数
21         enhancer.setCallback(this);
22         return enhancer.create();
23     }
24 
25     @Override
26     public Object intercept(Object object, Method method, Object[] args,
27             MethodProxy proxy) throws Throwable {
28         AopServiceImpl aopServiceImpl = (AopServiceImpl) this.targetObject;
29         if (aopServiceImpl.getUser() != null) {
30             return proxy.invoke(this.targetObject, args);
31         } 
32         return null;
33     }
34 }

单元测试

 1 package junit.test;
 2 
 3 import org.junit.Test;
 4 
 5 import com.cglib.factory.CGlibFactory;
 6 import com.cglib.service.impl.AopServiceImpl;
 7 
 8 public class CGlibUnitTest {
 9     @Test public void CGlibTest(){
10         CGlibFactory cGlibFactory=new CGlibFactory();
11         AopServiceImpl aopServiceImpl=(AopServiceImpl)cGlibFactory.creatObjectIntance(new AopServiceImpl("test"));
12         aopServiceImpl.save();
13     }
14 }