java - 将 jpasswordfield.getpassword() 与保存在 mysql 列中的安全 jpasswordfield 进行比较？

Question

如何将 jpasswordfield.getpassword() 登录框架与保存在 mysql 列中的安全 jpasswordfield 进行比较？我的数据库中存储了用户 ID 和密码，我想将输入的密码与存储在数据库中的密码进行比较。存储在数据库中的密码应该加密，这样管理员就看不到正确的密码。我会在你想的任何地方搜索，如果你知道我的问题，请帮助我，tnx

我的代码：

public class LoginTester {

    public static String[] Passwords; // i try with char[], Array[], ... but not worked
    private static Connection con;
    private static Statement st;

    public static void main(String[] args) {

        try {
            Class.forName("com.mysql.jdbc.Driver").newInstance();
            String url = "jdbc:mysql://%s:%s/%s?user=%s&password=%s";
            url = String.format(url, "localhost", 3308, "logindb", "root", "root");
            con = DriverManager.getConnection(url);
            st = con.createStatement();
            ResultSet rs = st.executeQuery("select * from users where username='" + TfUserName.getText() + "'");
            rs.last();
            int RowCount = rs.getRow();
            rs.beforeFirst();
            Passwords = new String[RowCount];
            int i = 0;
            while (rs.next()) {
                Passwords[i] = rs.getString("password");
                i++;
            }
            rs.close();
            st.close();
            con.close();
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}