java 1.6中最近出来的cookiemanager感觉不能用啊，使用一点感觉都没有

[xunzhaofenghua]

import java.net.CookieHandler;
import java.net.CookieManager;
import java.net.CookieStore;
import java.net.HttpCookie;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;

public class Main {
  public static void main(String args[]) throws Exception {
    String urlString = "http://java.sun.com";
    CookieManager manager = new CookieManager();
    CookieHandler.setDefault(manager);
    URL url = new URL(urlString);
    URLConnection connection = url.openConnection();
    Object obj = connection.getContent();
    url = new URL(urlString);
    connection = url.openConnection();
    obj = connection.getContent();
    CookieStore cookieJar = manager.getCookieStore();
    List<HttpCookie> cookies = cookieJar.getCookies();
    for (HttpCookie cookie : cookies) {
      System.out.println(cookie);
    }
  }
}

用这段代码获得不到什么值啊

这是怎么回事？谁知道是什么原理啊

[xunzhaofenghua]

现在不流行java了？怎么没有人回复啊