Java 模擬cookie登陸簡單操作示例

import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;

/**
 * @Author: jljiang
 * @Description:Java 模擬cookie登陸
 * @Date: Created in 2019/1/16 15:14
 */
public class ImitateLoginController {

  public static void main(String args[]) throws Exception {
    //登陸接口地址
    String loginStr = "http://zenta.51fb.com/index.php?m=user&f=login";
    /**
     * 首先要和URL下的URLConnection對話。 URLConnection可以很容易的從URL得到。比如： // Using
     * java.net.URL and //java.net.URLConnection
     */
    URL url = new URL(loginStr);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setDoOutput(true);
    OutputStreamWriter out = new OutputStreamWriter(connection
        .getOutputStream(), "GBK");
    //其中的account和password可以通過控制臺去查看，或者看頁面html去查看
    out.write("account=you-user-name&password=you-password");
// remember to clean up
    out.flush();
    out.close();

// 取得cookie，使用該cookie放在頭部就可以訪問其他需要登陸才可以訪問的接口了
    String cookieVal = connection.getHeaderField("Set-Cookie");

/*------------------------------------訪問其他接口-------------------------------------------------*/
    String otherUrl = "http://zenta.51fb.com/index.php?m=bug&f=browse";
    url = new URL(otherUrl);
    HttpURLConnection otherConnection = (HttpURLConnection) url.openConnection();
    if(cookieVal != null){
      otherConnection.setRequestProperty("Cookie",cookieVal);
    }
    otherConnection.connect();
    InputStream urlStream = otherConnection.getInputStream();
    BufferedReader bufferedReader = new BufferedReader(
        new InputStreamReader(urlStream));
    String content = null;
    StringBuilder total = new StringBuilder();
    while ((content = bufferedReader.readLine()) != null) {
      total.append(content);
    }
    bufferedReader.close();
    System.out.println(content);
  }
}