使用httpclient模拟登录

               

import java.io.BufferedReader;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.util.ArrayList;

import java.util.List;

 

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.CookieStore;

import org.apache.http.client.HttpClient;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.cookie.Cookie;

import org.apache.http.impl.client.AbstractHttpClient;

import org.apache.http.impl.client.BasicCookieStore;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.impl.cookie.BasicClientCookie;

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.util.EntityUtils;

import org.junit.Test;

 

public class HttpClientLoginTest {

     @Test

     // 获取一个HTML页面的内容，一个简单的get应用

     public void grabPageHTML() throws Exception {

         HttpClient httpclient = new DefaultHttpClient();

         HttpGet httpget = new HttpGet( "http://www.baidu.com/" );

         HttpResponse response = httpclient.execute(httpget);

         HttpEntity entity = response.getEntity();

         String html = EntityUtils.toString(entity, "GBK" );

 

         // releaseConnection等同于reset，作用是重置request状态位，为下次使用做好准备。

         // 其实就是用一个HttpGet获取多个页面的情况下有效果；否则可以忽略此方法。

         httpget.releaseConnection();

 

         System.out.println(html);

     }

 

     // 下载一个文件到本地（本示范中为一个验证码图片）

     @Test

     public void downloadFile() throws Exception {

         String url = "http://www.lashou.com/account/captcha" ;

         File dir = new File( "D:\\TDDOWNLOAD" );

         if (!dir.exists()) {

             dir.mkdirs();

         }

         String destfilename = "D:\\TDDOWNLOAD\\yz.png" ;

         HttpClient httpclient = new

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