携带cookie发送请求

package org.jshand.utils.http;  
  
import java.io.FileOutputStream;  
  
import org.apache.http.HttpEntity;  
import org.apache.http.HttpResponse;  
import org.apache.http.client.CookieStore;  
import org.apache.http.client.methods.HttpGet;  
import org.apache.http.client.methods.HttpPost;  
import org.apache.http.impl.client.DefaultHttpClient;  
import org.apache.http.impl.conn.PoolingClientConnectionManager;  
import org.apache.http.util.EntityUtils;  
  
/** 
 * TODO(用一句话描述该文件的作用) 
 *  
 * @title: HttpClientDemo.java 
 * @author zhangjinshan-ghq 
 * @date 2014-6-11 14:59:04 
 */  

public class HttpClientDemo  
{  

/** 
 * The main method. 
 *  
 * @param args the arguments 
 * @throws Exception the exception 
 */  
public static void main(String[] args) throws Exception  
{  
    getResoucesByLoginCookies();  
}  

/** 
 * 根据登录Cookie获取资源 
 * 一切异常均未处理，需要酌情检查异常 
 *  
 * @throws Exception 
 */  
private static void getResoucesByLoginCookies() throws Exception  
{  
    HttpClientDemo demo = new HttpClientDemo();  
    String username = "XXXXXXXXX";// 登录用户  
    String password = "XXXXXXXX";// 登录密码  

    // 需要提交登录的信息  
    String urlLogin = "http://www.iteye.com/login?name=" + username + "&password=" + password;  

    // 登录成功后想要访问的页面 可以是下载资源 需要替换成自己的iteye Blog地址  
    String urlAfter = "http://314649444.iteye.com/";  

    DefaultHttpClient client = new DefaultHttpClient(new PoolingClientConnectionManager());  

    /** 
     * 第一次请求登录页面 获得cookie 
     * 相当于在登录页面点击登录，此处在URL中 构造参数， 
     * 如果参数列表相当多的话可以使用HttpClient的方式构造参数 
     * 此处不赘述 
     */  
    HttpPost post = new HttpPost(urlLogin);  
    HttpResponse response = client.execute(post);  
    HttpEntity entity = response.getEntity();  
    CookieStore cookieStore = client.getCookieStore();  
    client.setCookieStore(cookieStore);  

    /** 
     * 带着登录过的cookie请求下一个页面，可以是需要登录才能下载的url 
     * 此处使用的是iteye的博客首页，如果登录成功，那么首页会显示【欢迎XXXX】 
     *  
     */  
    HttpGet get = new HttpGet(urlAfter);  
    response = client.execute(get);  
    entity = response.getEntity();  

    /** 
     * 将请求结果放到文件系统中保存为 myindex.html,便于使用浏览器在本地打开 查看结果 
     */  

    String pathName = "d:\\myindex.html";  
    writeHTMLtoFile(entity, pathName);  
}  

/** 
 * Write htmL to file. 
 * 将请求结果以二进制形式放到文件系统中保存为.html文件,便于使用浏览器在本地打开 查看结果 
 *  
 * @param entity the entity 
 * @param pathName the path name 
 * @throws Exception the exception 
 */  
public static void writeHTMLtoFile(HttpEntity entity, String pathName) throws Exception  
{  

    byte[] bytes = new byte[(int) entity.getContentLength()];  

    FileOutputStream fos = new FileOutputStream(pathName);  

    bytes = EntityUtils.toByteArray(entity);  

    fos.write(bytes);  

    fos.flush();  

    fos.close();  
}  

}

第二种方式：在httpclient里配置cookie的管理方式，自动管理cookie

//创建自动管理cookie的httpClient
// RequestConfig requestConfig = RequestConfig.custom().setCookieSpec(CookieSpecs.STANDARD_STRICT).build();
// CloseableHttpClient httpClient = HttpClients.custom().setDefaultRequestConfig(requestConfig).build();