关于反射的完整 练习

做java的永远跳不过的一个坎就是反射，对反射的理解和利用 的能力 是一个天花板

package ft1;import java.lang.reflect.InvocationHandler;import java.lang.reflect.Method;import java.lang.reflect.Proxy;interface wt {void show();int add(int a, int b);int show(int a, String s);}class wg implements wt {public void show() {}public int add(int a, int b) {return a + b;}public int show(int a, String s) {// TODO Auto-generated method stubSystem.out.println(s);return a;};}class proxy<T> implements InvocationHandler {Object proxy;public proxy(Object proxy) {this.proxy = proxy;}T newProxyInstance(ClassLoader loader, Class<T>[] interfaces) {return (T) Proxy.newProxyInstance(loader, interfaces, this);}public Object invoke(Object pp, Method method, Object[] args)throws Throwable {System.out.println(method.getName() + "函数代理执行开始");System.out.println("...................");System.out.println("函数名称是" + method.getName());if (args != null) {System.out.println("参数有" + args.length + "个");for (int i = 0; i < args.length; i++) {System.out.println("参数值" + args[i] + " 参数类型"+ args[i].getClass().getName() + " ");}System.out.println();} else {System.out.println("没有参数");}System.out.println("返回值类型是" + method.getReturnType());System.out.println("...................");System.out.println("执行体xxx");Object ob = method.invoke(proxy, args);System.out.println("执行体xxx");if (method.getReturnType().toString().equals("void"))System.out.println(method.getName() + "没有返回值");else {System.out.println(method.getName() + "返回值是 " + ob);}System.out.println(method.getName() + "此函数代理执行完成\n");return ob;}}public class reflectTest {public static void main(String[] args) {wg g = new wg();wt t = new proxy<wt>(g).newProxyInstance(reflectTest.class.getClassLoader(), new Class[] { wt.class });t.show();System.out.println(t.add(1, 5));System.out.println(t.show(1, "ttttttttttttt"));System.out.println("######################################"); }}