静态代理
package staticproxy;/*** 接口* @author newtouch**/
public interface IHello {public void sayHello();public String doSomethong(String s);}
package staticproxy;/*** 实现类* @author newtouch**/
public class Hello implements IHello{@Overridepublic void sayHello() {System.out.println("zhangxiongfeng");}@Overridepublic String doSomethong(String s) {return s;}}
package staticproxy;/*** 静态代理类* @author newtouch**/
/*** * @author newtouch* * 问题 如果接口中有多个方法 静态代理中 就会有多重新代理的方法**/
public class StaticProxy {private IHello iHello;public StaticProxy(IHello iHello) {this.iHello=iHello;}public void sayHello() {iHello.sayHello();}public String doSomethong(String s) {return iHello.doSomethong(s);}}
package staticproxy;public class Test {public static void main(String[] args) {IHello iHello = new Hello();StaticProxy staticProxy = new StaticProxy(iHello);staticProxy.sayHello();System.out.println(staticProxy.doSomethong("zhangxiongfeng"));}} 动态代理：
package proxy;/*** 接口* @author newtouch**/
public interface IHello {public void sayHello();public String doSomethong(String s);}
package proxy;public class Hello implements IHello{@Overridepublic void sayHello() {System.out.println("zhangxiongfeng");}@Overridepublic String doSomethong(String s) {return s;}}
package proxy;import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;public class DynamicProxy implements InvocationHandler {private IHello iHello;DynamicProxy(IHello iHello) {this.iHello = iHello;}/*** 调用接口 IHello接口中的 任何方法都是要用下面的方法执行* * 可以不用像静态代理中 每个方法都必须重写 */@Overridepublic Object invoke(Object proxy, Method method, Object[] args) throws Throwable {// 在代理真实对象前我们可以添加一些自己的操作System.out.println("before rent house");System.out.println("Method:" + method);// 当代理对象调用真实对象的方法时，其会自动的跳转到代理对象关联的handler对象的invoke方法来进行调用method.invoke(iHello, args);// 在代理真实对象后我们也可以添加一些自己的操作System.out.println("after rent house");return null;}
}
package proxy;import java.lang.reflect.Proxy;public class Test {public static void main(String[] args) {// TODO Auto-generated method stubIHello iHello = new Hello();DynamicProxy dynamicProxy = new DynamicProxy(iHello);IHello hello = (IHello) Proxy.newProxyInstance(dynamicProxy.getClass().getClassLoader(), iHello.getClass().getInterfaces(), dynamicProxy);// hello.sayHello();System.out.println(hello.doSomethong("zhangxf"));}}
动态代理执行：
before rent house
Method:public abstract void proxy.IHello.sayHello()
zhangxiongfeng
after rent house
package proxy;import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Proxy;public class ProxyFactory<T> {private T t;private InvocationHandler invocationHandler;public ProxyFactory(T t,InvocationHandler invocationHandler) {this.t = t;this.invocationHandler = invocationHandler;}public T newProxyInstance() {return (T)Proxy.newProxyInstance(invocationHandler.getClass().getClassLoader(), t.getClass().getInterfaces(), invocationHandler);}
}动态工厂
