使用java-selenium中的driver.close未关闭多个登录会话

import java.util.HashMap;
import java.util.Map;

public class SessionManager {
    private Map<String, WebDriver> sessions;

    public SessionManager() {
        sessions = new HashMap<>();
    }

    public void addSession(String sessionId, WebDriver driver) {
        sessions.put(sessionId, driver);
    }

    public void closeSession(String sessionId) {
        WebDriver driver = sessions.get(sessionId);
        if (driver != null) {
            driver.close();
            sessions.remove(sessionId);
        }
    }
}

public class Main {
    public static void main(String[] args) {
        SessionManager sessionManager = new SessionManager();

        // 在登录时添加会话
        WebDriver driver1 = new ChromeDriver();
        String sessionId1 = "session1";
        sessionManager.addSession(sessionId1, driver1);

        WebDriver driver2 = new ChromeDriver();
        String sessionId2 = "session2";
        sessionManager.addSession(sessionId2, driver2);

        // 关闭指定的会话
        sessionManager.closeSession(sessionId1);
        sessionManager.closeSession(sessionId2);
    }
}