使用CGlib实现AOP功能

直接上代码了。

package com.cglib.service.impl;

public class AopServiceImpl {

    private String user = null;

    public String getUser() {
        return user;
    }

    public void setUser(String user) {
        this.user = user;
    }

    public AopServiceImpl() {
    }

    public AopServiceImpl(String user) {
        this.user = user;
    }
    
    public void save() {
        System.out.println("调用了save()方法");
    }
}

package com.cglib.factory;

import java.lang.reflect.Method;

import com.cglib.service.impl.AopServiceImpl;

import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

public class CGlibFactory implements MethodInterceptor {

    private Object targetObject = null;

    public Object creatObjectIntance(Object targetObject) {
        this.targetObject = targetObject;
        Enhancer enhancer = new Enhancer();
        //设置父类
        enhancer.setSuperclass(this.targetObject.getClass());
        //设置回调函数
        enhancer.setCallback(this);
        return enhancer.create();
    }

    @Override
    public Object intercept(Object object, Method method, Object[] args,
            MethodProxy proxy) throws Throwable {
        AopServiceImpl aopServiceImpl = (AopServiceImpl) this.targetObject;
        if (aopServiceImpl.getUser() != null) {
            return proxy.invoke(this.targetObject, args);
        } 
        return null;
    }
}

package junit.test;

import org.junit.Test;

import com.cglib.factory.CGlibFactory;
import com.cglib.service.impl.AopServiceImpl;

public class CGlibUnitTest {
    @Test public void CGlibTest(){
        CGlibFactory cGlibFactory=new CGlibFactory();
        AopServiceImpl aopServiceImpl=(AopServiceImpl)cGlibFactory.creatObjectIntance(new AopServiceImpl("test"));
        aopServiceImpl.save();
    }
}