HttpClient 模擬登陸，保持會話並進行後續操作

package cc.unmi.httpclient; 
 
import org.apache.commons.httpclient.Cookie;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.cookie.CookiePolicy;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.junit.Test;
 
public class HttpClientLogin {
 
    public static void main(String[] args){
        //登陸 Url
        String loginUrl = "http://localhost/unmi/login.html";
 
        //需登陸後訪問的 Url
        String dataUrl = "http://localhost/unmi/user_info.html?userid=123456";
 
        HttpClient httpClient = new HttpClient();
 
        //模擬登陸，按實際服務器端要求選用 Post 或 Get 請求方式
        PostMethod postMethod = new PostMethod(loginUrl);
 
        //設置登陸時要求的信息，一般就用戶名和密碼，驗證碼自己處理了
        NameValuePair[] data = {
                new NameValuePair("username", "Unmi"),
                new NameValuePair("password", "123456"),
                new NameValuePair("code", "anyany")
        };
        postMethod.setRequestBody(data);
 
        try {
            //設置 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();
            String tmpcookies= "";
            for(Cookie c:cookies){
                tmpcookies += c.toString()+";";
            }
 
            //進行登陸後的操作
            GetMethod getMethod = new GetMethod(dataUrl);
 
            //每次訪問需授權的網址時需帶上前面的 cookie 作爲通行證
            getMethod.setRequestHeader("cookie",tmpcookies);
 
            //你還可以通過 PostMethod/GetMethod 設置更多的請求後數據
            //例如，referer 從哪裏來的，UA 像搜索引擎都會表名自己是誰，無良搜索引擎除外
            postMethod.setRequestHeader("Referer", "http://unmi.cc");
            postMethod.setRequestHeader("User-Agent","Unmi Spot");
 
            httpClient.executeMethod(getMethod);
 
            //打印出返回數據，檢驗一下是否成功
            String text = getMethod.getResponseBodyAsString();
            System.out.println(text);
 
        } catch (Exception e) {
            e.printStackTrace();
        }   
    }
}

Basic 驗證的簡單代碼導引，還未親試：

HttpClient client = new HttpClient();
 
// 1
client.getState().setCredentials(
    new AuthScope("unmi.cc", 80, AuthScope.ANY_REALM),
    new UsernamePasswordCredentials("username", "password")
);
 
// 2
client.getParams().setAuthenticationPreemptive(true);
 
// 3
GetMethod getMothod = new GetMethod("http://unmi.cc/twitter");
 
// 4
getMothod.setDoAuthentication( true );
 
// 5
int status = client.executeMethod( getMothod );