JavaSE 反射 Part7

–原作者:尚硅谷-宋红康

---

静态代理&动态代理

---

静态代理

---

interface ClothFactory {    void productCloth();}class NikeClothFactory implements ClothFactory {    public NikeClothFactory() {    }    @Override    public void productCloth() {        System.out.println("Nike's Factory Begin Product Cloth!");    }}class ProxyFactory implements ClothFactory {    private ClothFactory cf;    public ProxyFactory(ClothFactory cf) {        this.cf = cf;    }    @Override    public void productCloth() {        System.out.println("方法一:开始执行");        cf.productCloth();        System.out.println("方法二:开始执行");    }}public class ProxyTest {    public static void main(String[] args) {        NikeClothFactory ncf = new NikeClothFactory();        ProxyFactory pf = new ProxyFactory(ncf);        pf.productCloth();    }}

---

动态代理

---

public class DynamicProxyTest {    public static void main(String[] args) {        NikeClothFactory nck = new NikeClothFactory();        MyInvocationHandler mih = new MyInvocationHandler();        ClothFactory cf = (ClothFactory) mih.getProxy(nck);        cf.productCloth();    }}class MyInvocationHandler implements InvocationHandler {    // 被代理类的对象    private Object obj;    // 给被代理类对象赋值,并创建代理类的对象    public Object getProxy(Object obj) {        this.obj = obj;        return Proxy.newProxyInstance(obj.getClass().getClassLoader(), obj.getClass().getInterfaces(), this);    }    @Override    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {        System.out.println("方法一:开始执行!");        // 执行被代理类方法        Object executeResult = method.invoke(obj, args);        System.out.println("方法二:开始执行!");        return executeResult;    }}