Java动态代理
动态代理 public interface Human { void info(); void fly(); } //被代理类 public class SuperMan implements Human { @Override public void fly() { System.out.println(" i can fly"); } @Override public void info() { System.out.println("我是超人"); } } public class MyInvocationHandler implements InvocationHandler { Object obj; public void setObj(Object obj) { this.obj = obj; } @Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { HumanUtil hu = new HumanUtil(); hu.method1(); Object returnVal = method.invoke(obj,args); hu.method2(); return returnVal; } } //代理方法 public class HumanUtil { public void method1(){ System.out.println("===方法一==="); } public void method2(){ System.out.println("===方法二==="); } } //代理类对象 public class MyProxy { public static Object getProxyInstance(Object obj){ MyInvocationHandler mih = new MyInvocationHandler(); mih.setObj(obj); return Proxy.newProxyInstance(obj.getClass().getClassLoader(),obj.getClass().getInterfaces(),mih); } } public class TestAOP { public static void main(String[] args){ SuperMan sm = new SuperMan(); Object obj = MyProxy.getProxyInstance(sm); Human h =(Human)obj; h.info(); System.out.println(); h.fly(); } }
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