Jsoup爬取登录网站信息

public void test(){
    try {
        Connection.Response res = Jsoup.connect("http://登录页面")
                .data("username","liuzw","password","lovelyliu")
                .method(Connection.Method.POST)
                .execute();
        Document doc = res.parse();
        String sessionId = res.cookie("JSESSIONID");//此处JSESSIONID根据网站SESSION获取
        Document objectDoc = Jsoup.connect("http://登陆后访问页面").cookie("JSESSIONID",sessionId).get();
        System.out.println("over");
    } catch (IOException e) {
        e.printStackTrace();
    }
}