httpclient模拟登录有关问题

httpclient模拟登录问题
请问用httpclient模拟登录http://jw.zhku.edu.cn/jwmis/_data/index_LOGIN.aspx
这个网站的思路是什么
------解决思路----------------------
用HttpClient

    public  void login() throws IOException {
        PostMethod post = new PostMethod("http://jw.zhku.edu.cn/jwmis/_data/index_LOGIN.aspx");
        post.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=utf-8");
        //你要登录，需要的参数
        NameValuePair[] param = {
                new NameValuePair("Sel_Type","STU"),
                new NameValuePair("txt_asmcdefsddsd","xxx"),
                new NameValuePair("txt_pewerwedsdfsdff","xxxxxxx"),
                new NameValuePair("txt_sdertfgsadscxcadsads","xxxxx") } ;
        post.setRequestBody(param);
        post.releaseConnection();

        HttpClient httpClient = new HttpClient();
        httpClient.executeMethod(post);
        //这个请求对应的方法，输出是否登录成功的结果，用户json格式的字符串，
        String response = post.getResponseBodyAsString();
        //response得到这个返回值，转成json类型，就可以了啊
    }