String name= uname.getText();
String password=new String (PassW.getPassword());
    
try {
    Class.forName("com.mysql.jdbc.Driver");
    Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/attms?autoReconnect=true&useSSL=false","root","");
    
   Statement stm= con.createStatement();
   String q="SELECT * FROM admin;";                             

    ResultSet rs= stm.executeQuery(q);
   
    while (rs.next())
    {
        String user= rs.getString("Username");
        String pass= rs.getString("Password");
    
        if(name.equals(user)&& password.equals(pass)) {
            JOptionPane.showMessageDialog(null, "Welcome " +name ,"Login Successfull", JOptionPane.PLAIN_MESSAGE);
            new AdminFrame().setVisible(true);
            this.dispose();
        } else {
            JOptionPane.showMessageDialog(this,"Invalid Username&Password","",JOptionPane.ERROR_MESSAGE);
             
        }  
    }

我想将给定的用户名与数据库中存储的用户名数据逐一进行比较，如果条件为真，则允许进入此代码中的另一帧。我使用if语句，它只检查一个数据