我知道关于这个问题已经有很多问题了，相信我，我已经看完了所有的问题。
一些背景知识，我正在使用intellij，我可以用intellij的数据源工具连接到数据库，也可以用终端ssh连接到服务器本身。出于某种原因，即使我尝试用java做同样的事情，它也不起作用。这是我的密码：

String serverIP = "123.45.67.890"
String username = "root";
String password = "password";

// Establish SSH tunnel with server if not running locally
try {
    if (!Inet4Address.getLocalHost().getHostAddress().equals(ServerIP) {
        System.out.println("Remote connection detected.");
        System.out.println("Establishing SSH Tunnel...");
        JSch jSch = new JSch();
        Session session = jSch.getSession(username, ServerIP, 22);
        session.setConfig("StrictHostKeyChecking", "no");
        session.setPassword(password);
        System.out.printf("Connecting to remote server at %s...\n", ServerIP);
        session.connect();
        System.out.println("Connected!");
        session.setPortForwardingL(3306, ServerIP, 3306);
    }
} catch (Exception e) {
    e.printStackTrace();
}

// Load mySQL Driver
System.out.println("Loading driver...");
try {
    Class.forName("com.mysql.jdbc.Driver");
    System.out.println("Driver loaded!");
} catch (ClassNotFoundException e) {
    throw new IllegalStateException("Cannot find the driver in the classpath!", e);
}

String url = String.format("jdbc:mysql://%s:3306/db_name", ServerIP);

// Connect to database
System.out.println("Connecting to database...");

try (Connection connection = DriverManager.getConnection(url, username, password)) {
    System.out.println("Database connected!");
    this.connection = connection;
} catch (SQLException e) {
    this.connection = null;
    throw new IllegalStateException("Cannot connect to database!", e);
}

我得到的错误是：

Remote connection detected.
Establishing SSH Tunnel...
Connecting to remote server at 123.45.67.890...
Connected!
Loading driver...
Driver loaded!
Connecting to database...

java.lang.IllegalStateException: Cannot connect to database!

    ...
    a bunch of crap
    ...
Caused by: java.sql.SQLException: null,  message from server: "Host 'my.personal.computer.local.hostname' is not allowed to connect to this MySQL server"
    ...
    a bunch more crap
    ...

在我看来，由于某种原因，java代码没有使用ssh隧道，我花了很多精力复制stackoverflow代码，而是粗暴地尝试正常连接。我做错什么了？
更多信息：服务器本身配置为侦听0.0.0.0上的sql，我还将防火墙设置为接受端口3306上的连接。
为清晰起见编辑：我知道我可以通过在服务器上授予本地计算机权限来解决这个问题，但是我希望能够通过ssh进行连接。