Spring -AOP -java静态代理和动态代理实例

静态代理-可以通过类代理也可以通过接口代理

动态代理只能通过接口代理，但比静态代理灵活

静态代理实例

/** * 静态代理可通过接口或者类进行代理 * @author Administrator * */public class StaticProxyTest {public static void main(String[] args) {//基于接口MyPhone myPhone = new MyPhoneImpl();StaticProxy proxy = new StaticProxy(myPhone);proxy.name("华为");//基于类MyPhoneClass myPhoneClass = new MyPhoneClass();ProxyEntity entity = new ProxyEntity(myPhoneClass);entity.name("小米");}}/** * 接口 * @author Administrator * */interface MyPhone{public void name(String str);}/** * 接口实现类 * @author Administrator * */class MyPhoneImpl implements MyPhone{@Overridepublic void name(String str) {System.out.println("早上好"+str); }}/** * 自定义静态代理类 * @author Administrator * */class StaticProxy implements MyPhone{MyPhone myPhone;public StaticProxy(MyPhone myPhone) {this.myPhone = myPhone;}@Overridepublic void name(String str) {beforeFun();myPhone.name(str);afterFun();}public void beforeFun(){System.out.println("前置代理");}public void afterFun(){System.out.println("后置代理");}}/** * 实体类 * @author Administrator * */class MyPhoneClass{public void name(String str){System.out.println("基于类实现："+str);}}/** * 基于类的代理 * @author Administrator * */class ProxyEntity extends MyPhoneClass{MyPhoneClass myPhone;public ProxyEntity(MyPhoneClass myPhone) {this.myPhone = myPhone;}@Overridepublic void name(String str) {beforeFun();myPhone.name(str);afterFun();}public void beforeFun(){System.out.println("前置代理");}public void afterFun(){System.out.println("后置代理");}}

动态代理实例

public class DynamicProxy implements InvocationHandler{private Object subject;//代理的真实对象public DynamicProxy(Object subject) {this.subject = subject;}@Overridepublic Object invoke(Object proxy, Method method, Object[] args) throws Throwable {//添加前置beforeFun();//主方法method.invoke(subject, args);//添加后置afterFun();return null;}public void beforeFun(){System.out.println("前置代理");}public void afterFun(){System.out.println("后置代理");}}

public class Test {public static void main(String[] args) {//代理的真实对象Phone myPhone = new MyPhone();//获取代理类，将真实对象放入代理类中InvocationHandler dynamicProxy = new DynamicProxy(myPhone);//调用Proxy的newProxyInstace方法创建代理对象Phone phone = (Phone) Proxy.newProxyInstance(dynamicProxy.getClass().getClassLoader(), myPhone.getClass().getInterfaces(), dynamicProxy);phone.name("华为");phone.price(1000);}}