用httpclient获取航空公司航班信息
我想用Httpclient来获取中国东方航空公司的航班信息.但不能成功.返回的是查询页面的HTML字符串.我想它返回的是查询结果的HTML字符串.请问下面代码有什么问题? 
package test; 

import java.io.IOException; 
import java.io.InputStream; 
import java.io.BufferedReader; 
import java.io.InputStreamReader; 
import java.lang.StringBuffer; 
import java.lang.String; 

import org.apache.commons.httpclient.Header; 
import org.apache.commons.httpclient.HttpClient; 
import org.apache.commons.httpclient.NameValuePair; 
import org.apache.commons.httpclient.methods.*; 
import org.apache.commons.httpclient.HttpStatus; 
/* 
* 获取中国东方航空公司的航班 
*/ 
public class test1 
{ 
private static final String CHARSET = "UTF-8"; 

public static void main(String[] args) throws IOException 
{ 
HttpClient client = new HttpClient(); 
client.getHostConfiguration().setHost("www.ce-air.com",80,"http"); 
PostMethod post = new PostMethod("/cea2/zh_CN/info/avail?sid=3005"); 
NameValuePair[] data = {new NameValuePair("deptAirport", "SHA"), //出发城市上海 
  new NameValuePair("arrAirport", "PEK"), //到达城市北京 
  new NameValuePair("deptDate","20080628"),//日期 
  }; 
post.setRequestBody(data); 
try 
{ 
int statuscode = client.executeMethod(post); 
InputStream ins; 
BufferedReader br; 
if ((statuscode == HttpStatus.SC_MOVED_TEMPORARILY) //判断是否有重定向地址 
¦ ¦ (statuscode == HttpStatus.SC_MOVED_PERMANENTLY) 
¦ ¦ (statuscode == HttpStatus.SC_SEE_OTHER) 
¦ ¦ (statuscode == HttpStatus.SC_TEMPORARY_REDIRECT)) 
{ 
Header header = post.getResponseHeader("location"); //获取重定向的地址 
String newuri = header.getValue(); 
if ((newuri == null) ¦ ¦ (newuri.equals(""))) 
newuri = "/"; 
GetMethod redirect = new GetMethod("/" + newuri); //重新执行 
client.executeMethod(redirect); 
ins = redirect.getResponseBodyAsStream(); 
br = new BufferedReader(new InputStreamReader(ins, CHARSET)); 
} 
else //没有重定向地址 
{ 
ins = post.getResponseBodyAsStream(); 
br = new BufferedReader(new InputStreamReader(ins, CHARSET)); 
System.err.println("没有重定向地址!"); 
}  
  StringBuffer sb = new StringBuffer(); 
  String line = null; 
  while ( (line=br.readLine())!=null) 
  { 
  sb.append(line); 
  sb.append("\n"); 
  } 
  br.close(); 
  System.out.println(sb.toString()); //输出获取的字符串 
}catch(IOException e) 
{ 
e.printStackTrace(); 
}finally 
{ 

post.releaseConnection(); 
} 

  } 
} 


------解决方案--------------------
先看看 查询的URL 是否正确 ， 网站需要登陆吗