httpclient简单应用，登录开心网的例子

需要用到的java包 
commons-httpclient-3.1.jar 
commons-logging.jar 
log4j-1.2.15.jar 
commons-codec.jar 


很简单，没什么好说的，直接上代码：

package httpclienttest;   
  
import org.apache.commons.httpclient.Cookie;   
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 LoginKaixin {   
    private static final String LOGON_SITE = "http://www.kaixin001.com";   
    private 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);   
           
        //登录页面   
        PostMethod post = new PostMethod("http://www.kaixin001.com/login/login.php");   
        NameValuePair ie = new NameValuePair("User-Agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows 2000)");      
        NameValuePair url = new NameValuePair("url", "/home/");   
        NameValuePair username = new NameValuePair("email","[email protected]");   
        NameValuePair password = new NameValuePair("password", "xxxxxx");   
    post.setRequestBody(new NameValuePair[] { ie,url,username, password});   
        client.executeMethod(post);   
        System.out.println("******************************登录******************************");   
        Cookie[] cookies = client.getState().getCookies();   
        client.getState().addCookies(cookies);   
        post.releaseConnection();   
        System.out.println("******************************页面转向******************************");   
        String newUrl="http://www.kaixin001.com/home/";   
        System.out.println("==========Cookies============");   
        int i=0;   
        for(Cookie c:cookies){   
            System.out.println(++i+":   "+c);   
        }   
        client.getState().addCookies(cookies);   
        post.releaseConnection();   
        GetMethod get = new GetMethod(newUrl);   
        get.setRequestHeader("Cookie", cookies.toString());   
        client.executeMethod(get);   
        String responseString = get.getResponseBodyAsString();   
        //登录后首页的内容   
        System.out.println(responseString);   
        get.releaseConnection();   
        System.out.println("******************************组件功能******************************");   
        //"http://www.kaixin001.com/!slave/index.php", "朋友买卖"   
        //"http://www.kaixin001.com/!parking/index.php", "争车位"   
        //"http://www.kaixin001.com/!house/index.php?_lgmode=pri", "买房子"    
        //http://www.kaixin001.com/!house/index.php?_lgmode=pri&t=49   
        //"http://www.kaixin001.com/!house/garden/index.php","花园"   
        //(1)进入朋友买卖****************   
        System.out.println("******************************(1)进入朋友买卖******************************");   
        String slave="http://www.kaixin001.com/!slave/index.php";   
        get = new GetMethod(slave);   
        get.setRequestHeader("Cookie", cookies.toString());   
        client.executeMethod(get);   
        responseString = get.getResponseBodyAsString();   
        System.out.println(responseString);   
        get.releaseConnection();   
        //(2)进入争车位****************   
        System.out.println("******************************(2)进入争车位******************************");   
        String parking="http://www.kaixin001.com/!parking/index.php";   
        get = new GetMethod(parking);   
        get.setRequestHeader("Cookie", cookies.toString());   
        client.executeMethod(get);   
        responseString = get.getResponseBodyAsString();   
        System.out.println(responseString);   
        get.releaseConnection();   
        //(3)进入买房子****************   
        System.out.println("******************************(3)进入买房子*******************************");   
        String house="http://www.kaixin001.com/!house/index.php?_lgmode=pri&t=49";   
        get = new GetMethod(house);   
        get.setRequestHeader("Cookie", cookies.toString());   
        client.executeMethod(get);   
        responseString = get.getResponseBodyAsString();   
        System.out.println(responseString);   
        get.releaseConnection();   
        //(4)进入花园****************   
        System.out.println("******************************(4)进入花园*******************************");   
        String garden="http://www.kaixin001.com/!house/garden/index.php";   
        get = new GetMethod(garden);   
        get.setRequestHeader("Cookie", cookies.toString());   
        client.executeMethod(get);   
        responseString = get.getResponseBodyAsString();   
        System.out.println(responseString);   
        get.releaseConnection();   
           
           
    }   
  
}  

 文章出处：http://xieruilin.iteye.com/blog/746294