HttpClient登陆163 简单例子_JAVA_编程开发_程序员俱乐部

import org.apache.commons.httpclient.Cookie; 
import org.apache.commons.httpclient.Header; 
import org.apache.commons.httpclient.HttpClient; 
import org.apache.commons.httpclient.NameValuePair; 
import org.apache.commons.httpclient.methods.GetMethod; 
import org.apache.commons.httpclient.methods.PostMethod; 


public class Test 
{ 

  static final String LOGON_SITE = "http://mail.163.com"; 
  static final int LOGON_PORT = 80; 

  public static void main(String[] args) throws Exception 
   { 
     HttpClient client = new HttpClient(); 
     client.getHostConfiguration().setHost(LOGON_SITE, LOGON_PORT); 

    //登录 
     PostMethod post = new PostMethod( 
        "http://reg.163.com/logins.jsp?type=1&url=http://fm163.163.com/coremail/fcg/ntesdoor2?lightweight=1&verifycookie=1&language=-1&style=16"); 
     NameValuePair username = new NameValuePair("username", "你的用户名@163.com"); 
     NameValuePair password = new NameValuePair("password", "你的密码"); 
     post.setRequestBody(new NameValuePair[] { username, password }); 
     client.executeMethod(post); 
     String responseString = new String(post.getResponseBodyAsString().getBytes( 
        "gbk")); 
     System.out 
         .println("=========================登录页面==========================="); 
     System.out.println(responseString); 
     Cookie[] cookies = client.getState().getCookies(); 
     client.getState().addCookies(cookies); 
     post.releaseConnection(); 

    int startPos = responseString 
         .indexOf("http://reg.youdao.com/crossdomain.jsp?username="); 
    int endPos = responseString.indexOf("\"", startPos + 1); 
     String newUrl = responseString.substring(startPos, endPos); 
     System.out 
         .println("===========================第一次页面转向============================"); 
     System.out.println(newUrl); 

    //以get方式请求跳转页面 
     GetMethod get = new GetMethod(newUrl); 
     get.setRequestHeader("Cookie", cookies.toString()); 
     client.executeMethod(get); 
     responseString = new String(get.getResponseBodyAsString().getBytes("gbk")); 

    //向控制台打印登陆后页面的html 
     System.out 
         .println("==========================第一次转向后的页面=================================="); 
     System.out.println(responseString); 
     get.releaseConnection(); 

     startPos = responseString.indexOf("http://fm163.163"); 
     endPos = responseString.indexOf("\"", startPos + 1); 
     newUrl = responseString.substring(startPos, endPos); 
     System.out 
         .println("=============================第二次页面转向======================================="); 
     System.out.println(newUrl); 

     get = new GetMethod(newUrl); 
     get.setRequestHeader("Cookie", cookies.toString()); 
     client.executeMethod(get); 
     responseString = new String(get.getResponseBodyAsString().getBytes("gbk")); 
     System.out.println("==========================第二次转向后的页面============================="); 
     System.out.println(responseString); 
     get.releaseConnection(); 
   } 
} 

文章出处：http://xieruilin.javaeye.com/blog/746299