commons-httpclient.jar的使用(处理页面重定向)

package  com.test;

import  java.io.IOException;

import  org.apache.commons.httpclient.Header;

import  org.apache.commons.httpclient.HttpClient;

import  org.apache.commons.httpclient.HttpMethod;

import  org.apache.commons.httpclient.HttpStatus;

import  org.apache.commons.httpclient.StatusLine;

import  org.apache.commons.httpclient.methods.GetMethod;

public   class  RedirectTest  ... {

    public static void main(String[] args) throws IOException...{

        HttpClient client = new HttpClient();

        client.getHostConfiguration();

    //    client.getHostConfiguration().setHost("www.imobile.com.cn", 80, "http");

    //    client.getHostConfiguration().setHost("", 80);

        HttpMethod method = new GetMethod("http://127.0.0.1:8080/httpClient/a.jsp");

        client.executeMethod(method);

        StatusLine statusMsg = method.getStatusLine();

        System.out.println(statusMsg);

        System.out.println(method.getResponseBodyAsString());

        System.out.println("--------------------------------------------------------------------------");

        //检查是否有重定向

        int statusCode = method.getStatusCode();

        System.out.println(statusCode);

        if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY || statusCode == HttpStatus.SC_MOVED_TEMPORARILY 

                || statusCode ==  HttpStatus.SC_SEE_OTHER || statusCode == HttpStatus.SC_TEMPORARY_REDIRECT)...{

            //读取新的URL地址

            Header header = method.getRequestHeader("location");

            if (header != null)...{

                String newurl = header.getValue();

                if (header == null || header.equals(""))...{

                    newurl = "/";

                }

                GetMethod redirect = new GetMethod(newurl);

                client.executeMethod(redirect);

                System.out.println("redirect:  " + redirect.getStatusLine().toString());

                redirect.releaseConnection();

            }else...{

                System.out.println("Invialid Redirect///");

            }

        }

    }

}