java动态代理
package blog.dynamicProxy;import java.lang.reflect.InvocationHandler;import java.lang.reflect.Method;public class JDynamicProxy { public static void main(String[] args) { RealSubject real=new RealSubject(); Subject sub=(Subject)java.lang.reflect.Proxy.newProxyInstance(Subject.class.getClassLoader(), new Class[]{Subject.class}, new DynamicProxy(real)); sub.performance(10000); sub.performance(90000); }}interface Subject{ public void performance(int n);}class RealSubject implements Subject{ @Override public void performance(int n) { String str=null; for(int i=0;i<n;++i){ str+=String.valueOf(i); } }}class DynamicProxy implements InvocationHandler{ protected Object proxied; public DynamicProxy(Object o){ this.proxied=o; } @Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { long before=System.currentTimeMillis(); method.invoke(proxied, args); long time=System.currentTimeMillis()-before; System.out.println(time); return null; } }