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", "youUserName"), 
new NameValuePair("passwd", "yourPwd") }; 
// 将表单的值放入postMethod中 
postMethod.setRequestBody(data); 
// 执行postMethod 
int statusCode = httpClient.executeMethod(postMethod); 
// 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"); 
  String location = null; 
  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; 
}