db 연동은 잘 되는데 이래저래 찾아봐도 제가 하고싶은 부분이 막혀서 진행이 안되더라구요 ㅠㅠ 로그인 버튼 누르면 id입력창에 입력한 내용이 db로 전송되고, Joptionpane massage를 사용해서 id를 불러와 id+님 환영합니다! 를 띄워주고싶은데... sql전송하는 부분부터 막혀버리니 너무 머리가 아프네요...도움 주실 분 있을까요?

public class LoginForm extends JFrame{ FormDTO dto = new FormDTO(); //dto 객체 생성

public LoginForm() {
    super("Household_login"); //타이틀



    setLayout(new BorderLayout());
    JPanel p1 = new JPanel();
    p1.setLayout(null);

    JLabel lb_text1 = new JLabel("Login Page");
    JLabel lb_id = new JLabel("이름");
    JTextField tf_id = new JTextField();
    JButton btn_login = new JButton("로그인");

    lb_text1.setBounds(160, 30, 100, 30);
    lb_id.setBounds(100, 100, 30, 30);
    tf_id.setBounds(135, 100, 150, 30);
    btn_login.setBounds(220, 180, 120, 50);



    setSize(400, 300); //창 크기 설정

    p1.add(lb_text1);
    p1.add(lb_id);
    p1.add(tf_id);
    p1.add(btn_login);
    add(p1);

    Dimension frameSize = getSize();

    Dimension windowSize = Toolkit.getDefaultToolkit().getScreenSize();
    setLocationRelativeTo(null);        
    setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    setVisible(true);

    /*  이벤트 코드    */

    btn_login.addActionListener(new ActionListener() {

        @Override
        public void actionPerformed(ActionEvent e) {
            // TODO Auto-generated method stub
            Object obj = e.getSource();

            dto.setName(tf_id.getName());

            try {
                FormDAO.create(dto);    //dto를 dao에 넘겨준다
            }catch(Exception e1) {
                e1.printStackTrace();
            }

            new HomeForm();
            setVisible(false);  //창 안보이게 하기
        }





    });




}

}

dao

public class FormDAO {

FormDAO(){

}

public static boolean create(FormDTO dto) throws Exception{
    // TODO Auto-generated method stub
    boolean flag = false;
    Connection conn = null;
    Statement stmt = null;

    String name = dto.getName();

    String sql = "INSERT INTO member(name) VALUES";

    try {


        Class.forName("com.mysql.jdbc.Driver");
        conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/household", "root","1234");
        System.out.println("DB 연결 완료");
        stmt = (Statement) conn.createStatement();
        stmt.executeUpdate(sql);

        flag = true;

        /*
        ResultSet srs = stmt.executeQuery("select * from student");
        printData(srs, "name", "id", "dept");
        srs = stmt.executeQuery("select name, id, dept from student where name='이기자'"); 
        printData(srs, "name", "id", "dept");
        */
    } catch (ClassNotFoundException e) {
        System.out.println("JDBC 드라이버 로드 에러");
        flag = false;
    } catch (SQLException e) {
        System.out.println("SQL 실행 에러");
        flag = false;
    }
    return flag;
}

}

DTO

public class FormDTO {

private String name;
private String contents;
private String date;
private String group;
private int income;
private int expense;

//이클립스팁 : Getter/Setter 만들기
//우클릭 -> source->Generate Getters And Setters-> [Select AlL] -> [OK]

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getContents() {
    return contents;
}

public void setContents(String contents) {
    this.contents = contents;
}

public String getDate() {
    return date;
}

public void setDate(String date) {
    this.date = date;
}

public String getGroup() {
    return group;
}

public void setGroup(String group) {
    this.group = group;
}

public int getIncome() {
    return income;
}

public void setIncome(int income) {
    this.income = income;
}

public int getExpense() {
    return expense;
}

public void setExpense(int expense) {
    this.expense = expense;
}



//DTO 객체 확인
//이클립스팁 : toString() 자동생성: 우클릭 -> source -> Generate toString->[OK]

@Override
public String toString() {
    return "FormDTO [name=" + name + ", contents=" + contents + ", date=" + date + ", group=" + group + ", income="
            + income + ", expense=" + expense + "]";
}

}