httpClient 保持session

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


public class TestLogin {
     public static void main(String[] args) {  
            // 登陸 Url  
            String loginUrl = "http://139.196.40.80:3000/login";  
            // 需登陸後訪問的 Url  
            String dataUrl = "http://139.196.40.80:3000/index";  
      
            HttpClient httpClient = new HttpClient();  
      
            // 類比登陸，按實際伺服器端要求選用 Post 或 Get 請求方式  
            PostMethod postMethod = new PostMethod(loginUrl);  
      
            // 設定登陸時要求的資訊，使用者名稱和密碼  
            NameValuePair[] data = { new NameValuePair("username", "lixiuming"),  
                    new NameValuePair("password", "lixiuming") };  
            postMethod.setRequestBody(data);  
            try {  
                // 設定 HttpClient 接收 Cookie,用與瀏覽器一樣的策略  
                httpClient.getParams().setCookiePolicy(  
                        CookiePolicy.BROWSER_COMPATIBILITY);  
                httpClient.executeMethod(postMethod);  
                // 獲得登陸後的 Cookie  
                Cookie[] cookies = httpClient.getState().getCookies();  
                StringBuffer tmpcookies = new StringBuffer();  
                for (Cookie c : cookies) {  
                    tmpcookies.append(c.toString() + ";");
                   
                }
                // 進行登陸後的操作1581,1602,1603,1610,1609,1608,1607,1606,1605,1620,1619,1617,1616,1622,1626,1642,1648,1647,1657  
                GetMethod getMethod = new GetMethod(dataUrl);  
                // 每次訪問需授權的網址時需帶上前面的 cookie 作為通行證  
                getMethod.setRequestHeader("cookie", tmpcookies.toString());  
                // 你還可以通過 PostMethod/GetMethod 設定更多的請求後資料  
                // 例如，referer 從哪裡來的，UA 像搜尋引擎都會表名自己是誰，無良搜尋引擎除外  
                postMethod.setRequestHeader("Referer", "http://139.196.40.80:3000/index");  
                postMethod.setRequestHeader("User-Agent", "www Spot");  
                httpClient.executeMethod(getMethod);  
                // 列印出返回資料，檢驗一下是否成功  
                String text = getMethod.getResponseBodyAsString();  
                System.out.println(text);  
            } catch (Exception e) {  
                e.printStackTrace();  
            }  
        }
}

httpClient 保持session