Apache Jakarta Common HttpClient 无法登录跳转

[assertme_163_com]

今天在做一个用HttpClient 登录水木清华BBS的例子，可是当我运行程序时并没有跳转，状态码是 200 ，不知道是什么原因，等待高人指点迷津。我的用户名和密码是正确的，当我运行过程序之后再用IE去登录BBS说已经登录过了，可见程序正常登录了BBS 就是没有跳转。

package test;
import java.io.IOException;
import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
public class GetSample{
static String location = null;
public static void main(String[] args) {

String url = "http://www.newsmth.net/bbslogin2.php";
PostMethod postMethod = new PostMethod(url);
// 填入各个表单域的值
NameValuePair[] data = { new NameValuePair("id", "abc"),
new NameValuePair("passwd", "abc") };
// 将表单的值放入postMethod中
postMethod.setRequestBody(data);
HttpClient httpClient = new HttpClient();
// 执行postMethod
try {
int statusCode = httpClient.executeMethod(postMethod);
System.out.println(statusCode);
System.out.println(HttpStatus.SC_MOVED_PERMANENTLY);
System.out.println(HttpStatus.SC_MOVED_TEMPORARILY);
// HttpClient对于要求接受后继服务的请求，象POST和PUT等不能自动处理转发
// 301或者302
if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY ||
statusCode == HttpStatus.SC_MOVED_TEMPORARILY) {

// 从头中取出转向的地址
Header locationHeader = postMethod.getResponseHeader("location");

if (locationHeader != null) {
location = locationHeader.getValue();
System.out.println("The page was redirected to:" + location);
} else {
System.err.println("Location field value is null.");
}
return;
}else{
System.out.println("The page was redirected to:" + location);
}

} catch (Exception e) {
// TODO: handle exception
}

}
}