这是一个动态代理的例子,今天时间比较晚了,抽时间我会做一下分析.
package javapatterns;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.List;
import java.util.Vector;
/**
* Proxy Model 的研究
* <p>Title：VectorProxy.java</p>
* <p>Description：</p>
* <p>Copyright：Copyright (c) 2004 DSII,Inc</p>
* <p>Company：DSII,Inc</p>
* @authorMorgan 2004-11-8
* @version1.0
*/
public class VectorProxy implements InvocationHandler {
private Object proxyobj;
public VectorProxy(Object obj) {
proxyobj = obj;
}
public static Object factory(Object obj) {
Class cls = obj.getClass();
return Proxy.newProxyInstance(
cls.getClassLoader(),
cls.getInterfaces(),
new VectorProxy(obj));
}
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable {
System.out.println("before calling " + method);
if (args != null) {
for (int i = 0; i < args.length; i++) {
System.out.println(args[i] + "");
}
}
Object o = method.invoke(proxyobj, args);
System.out.println("after calling " + method);
return o;
}
public static void main(String[] args) {
List v = null;
v = (List) factory(new Vector(10));
v.add("New");
v.add("York");
}
}
