java：动态代理和cglib代理的简单例子

# 项目代码资源：

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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
{@Overridepublic 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);}@Overridepublic 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】
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# 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}
}