java：动态代理和cglib代理的简单例子

# 项目代码资源：

可能还在审核中，请等待。。。
https://download.csdn.net/download/chenhz2284/89457803

# 项目代码

【pom.xml】

<dependency>
    <groupId>cglib</groupId>
    <artifactId>cglib</artifactId>
    <version>3.3.0</version>
</dependency>

# 动态代理的例子

【BookFacade.java】

package com.chz.myProxy.dynamicProxy;

public interface BookFacade 
{
    void addBook();
}

【addBook.java】

package com.chz.myProxy.dynamicProxy;

public class BookFacadeImpl implements BookFacade
{
    @Override
    public void addBook() {
        System.out.println("chz >>> addBook");
    }
}

【BookFacadeProxy.java】

package com.chz.myProxy.dynamicProxy;

public class BookFacadeProxy implements InvocationHandler {

    private Object target;

    public Object bind(Object target) {
        this.target = target;
        return Proxy.newProxyInstance(
                target.getClass().getClassLoader(),
                target.getClass().getInterfaces(),
                this);
    }

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
    {
        Object result = null;
        System.out.println("chz >>> dynamic proxy before: " + method.getName());
        result = method.invoke(target, args);
        System.out.println("chz >>> dynamic proxy after: " + method.getName());
        return result;  
    }  
}

【MyDynamicProxyTest.java】

package com.chz.myProxy.dynamicProxy;

@Slf4j
public class MyDynamicProxyTest
{
    public static void main(String[] args)
    {
        BookFacadeProxy proxy = new BookFacadeProxy();
        BookFacade bookProxy = (BookFacade)proxy.bind(new BookFacadeImpl());;
        bookProxy.addBook();
    }
}

运行【MyDynamicProxyTest】
在这里插入图片描述

# cglib代理的例子

【BookFacade.java】

package com.chz.myProxy.cglib;

public class BookFacade 
{
    public void addBook() {
        System.out.println("chz >>> addBook");
    }
}

【BookFacadeCglib.java】

package com.chz.myProxy.cglib;

public class BookFacadeCglib implements MethodInterceptor 
{
    @Override  
    public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws Throwable
    {
        System.out.println("chz >>> cglib proxy before: " + method.getName());
        proxy.invokeSuper(obj, args);
        System.out.println("chz >>> cglib proxy after: " + method.getName());
        return null;  
    }
}

【MyCglibProxyTest.java】

package com.chz.myProxy.cglib;

public class MyCglibProxyTest
{
    public static void main(String[] args)
    {
        Enhancer enhancer = new Enhancer();
        enhancer.setSuperclass(BookFacade.class);               // 要代码的类
        enhancer.setCallback(new BookFacadeCglib());            // 代理回调
        BookFacade bookCglib = (BookFacade) enhancer.create();  // 创建一个代理对象
        bookCglib.addBook();                                    // 使用代理对象
    }
}