两种代理模式（JDK和Cglib）实例

CGlib代理模式：

package CGLIB;


import java.lang.reflect.Method;

import JDK.Test;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;
  
/** 
 * 使用cglib动态代理 
 *  
 * @author student 
 *  
 */  
public class BookFacadeCglib extends Test implements MethodInterceptor {  
    private Object target;  
  
    /** 
     * 创建代理对象 
     *  
     * @param target 
     * @return 
     */  
    public Object getInstance(Object target) {  
        this.target = target;  
        Enhancer enhancer = new Enhancer();  
        enhancer.setSuperclass(this.target.getClass());  
        // 回调方法  
        enhancer.setCallback(this);  
        // 创建代理对象  
        return enhancer.create();  
    }  
  
    @Override  
    // 回调方法  
    public Object intercept(Object obj, Method method, Object[] args,  
            MethodProxy proxy) throws Throwable {  
        System.out.println("事物开始");  
        proxy.invokeSuper(obj, args);  
        System.out.println("事物结束");  
        return null;  
  
  
    }


}  

package CGLIB;

import JDK.Test;

public class BookFacadeImpl1 extends Test{  
    public void addBook() {  
        System.out.println("增加图书的普通方法...");  
    }  
}  

package CGLIB;

public class TestCglib {
    public static void main(String[] args) {  
        BookFacadeCglib cglib=new BookFacadeCglib();  
        BookFacadeImpl1 bookCglib=(BookFacadeImpl1)cglib.getInstance(new BookFacadeImpl1());  
        bookCglib.addBook();  
        bookCglib.test_01();
    }  
}

JDK代理模式：

package JDK;

public interface BookFacade {
     public void addBook();  
     public void delBook();
}

package JDK;

public class BookFacadeImpl extends Test implements BookFacade {  
  
    @Override  
    public void addBook() {  
        System.out.println("增加图书方法。。。");  
    }

    @Override
    public void delBook() {
          System.out.println("删除图书方法。。。");
          
        
    }  
  
}  

package JDK;

import java.lang.reflect.InvocationHandler;  
import java.lang.reflect.Method;  
import java.lang.reflect.Proxy;  
  
/** 
 * JDK动态代理代理类 
 *  
 * @author student 
 *  
 */  
public class BookFacadeProxy implements InvocationHandler {  
    private Object target;  
    /** 
     * 绑定委托对象并返回一个代理类 
     * @param target 
     * @return 
     */  
    public Object bind(Object target) {  
        this.target = target;  
        //取得代理对象  
        return Proxy.newProxyInstance(target.getClass().getClassLoader(),  
                target.getClass().getInterfaces(), this);   //要绑定接口(这是一个缺陷，cglib弥补了这一缺陷)  
    }  
  
    @Override  
    /** 
     * 调用方法 
     */  
    public Object invoke(Object proxy, Method method, Object[] args)  
            throws Throwable {  
        Object result=null;  
        System.out.println("事物开始");  
        //执行方法  
        result=method.invoke(target, args);  
        System.out.println("事物结束");  
        return result;  
    }  
    
    
  
}  

package JDK;

public class Test {
    public void test_01(){
        System.out.println("test_01");
    }
}

package JDK;

public class TestProxy {


    public static void main(String[] args) {  
        BookFacadeProxy proxy = new BookFacadeProxy();  
        BookFacade bookProxy =  (BookFacade) proxy.bind(new BookFacadeImpl());  
        bookProxy.addBook();  
        bookProxy.delBook();
       
       
    }  
}