好的，我在向 mysql db 添加值的代码方面遇到了问题，有一个帖子（db 表，在 Eclipse 中创建的 java 表单）

Question

包装 sokic；

导入 java.awt.EventQueue；导入 java.awt.event.ActionEvent；导入 java.awt.event.ActionListener；导入 java.sql.Connection；导入 java.sql.DriverManager；导入 java.sql.ResultSet；导入 java.sql.SQLException；导入 java.util.logging.Level；导入 java.util.logging.Logger；

导入 javax.swing.JButton；导入 javax.swing.JFrame；导入 javax.swing.JLabel；导入 javax.swing.JPanel；导入 javax.swing.JTextField；导入 javax.swing.border.EmptyBorder；

导入 com.mysql.jdbc.Statement；

公共类 Nastavnici 扩展了 JFrame {

/**
 * 
 */
private static final long serialVersionUID = 1L;
private JPanel contentPane;
private JTextField tx_id_nastavnika;
private JTextField txt_ime;
private JTextField txt_prezime;
private JTextField txt_staz;
private JTextField txt_email;
private JTextField txt_telefon;
private JTextField txt_oblast;

/**
 * Launch the application.
 */
public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                Nastavnici frame = new Nastavnici();
                frame.setVisible(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}

/**
 * Create the frame.
 */
 public static void main1(String[] args) {

        Connection con = null;
        Statement st = null;
        ResultSet rs = null;

        String url = "jdbc:mysql://localhost:3306/studije";
        String user = "rootr";
        String password = "root";

        try {
            con = DriverManager.getConnection(url, user, password);
            st = (Statement) con.createStatement();
            rs = st.executeQuery("SELECT VERSION()");

            if (rs.next()) {
                System.out.println(rs.getString(1));
            }

        } catch (SQLException ex) {
            Logger lgr = Logger.getLogger(Nastavnici.class.getName());
            lgr.log(Level.SEVERE, ex.getMessage(), ex);

        } finally {
            try {
                if (rs != null) {
                    rs.close();
                }
                if (st != null) {
                    st.close();
                }
                if (con != null) {
                    con.close();
                }

            } catch (SQLException ex) {
                Logger lgr = Logger.getLogger(Nastavnici.class.getName());
                lgr.log(Level.WARNING, ex.getMessage(), ex);
            }
        }
 }
public Nastavnici() {
    setTitle("Nastavnici");
    setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    setBounds(100, 100, 450, 300);
    contentPane = new JPanel();
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
    setContentPane(contentPane);
    contentPane.setLayout(null);

    JButton btnNewButton = new JButton("Unesi");
    btnNewButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            NOW HOW ????
                }
            });
    btnNewButton.setBounds(12, 12, 131, 25);
    contentPane.add(btnNewButton);

    JLabel lblIdNastavnika = new JLabel("id nastavnika");
    lblIdNastavnika.setBounds(12, 49, 102, 15);
    contentPane.add(lblIdNastavnika);

    JLabel lblIme = new JLabel("ime");
    lblIme.setBounds(12, 76, 70, 15);
    contentPane.add(lblIme);

    JLabel lblPrezime = new JLabel("prezime");
    lblPrezime.setBounds(12, 103, 70, 15);
    contentPane.add(lblPrezime);

    JLabel lblStaz = new JLabel("staz");
    lblStaz.setBounds(12, 130, 70, 15);
    contentPane.add(lblStaz);

    JLabel lblEmail = new JLabel("email");
    lblEmail.setBounds(12, 157, 70, 15);
    contentPane.add(lblEmail);

    JLabel lblTelefon = new JLabel("telefon");
    lblTelefon.setBounds(12, 184, 70, 15);
    contentPane.add(lblTelefon);

    JLabel lblOblast = new JLabel("oblast");
    lblOblast.setBounds(12, 211, 70, 15);
    contentPane.add(lblOblast);

    tx_id_nastavnika = new JTextField();
    tx_id_nastavnika.setBounds(132, 47, 114, 19);
    contentPane.add(tx_id_nastavnika);
    tx_id_nastavnika.setColumns(10);

    txt_ime = new JTextField();
    txt_ime.setBounds(69, 74, 177, 19);
    contentPane.add(txt_ime);
    txt_ime.setColumns(10);

    txt_prezime = new JTextField();
    txt_prezime.setBounds(100, 101, 146, 19);
    contentPane.add(txt_prezime);
    txt_prezime.setColumns(10);

    txt_staz = new JTextField();
    txt_staz.setBounds(69, 128, 145, 19);
    contentPane.add(txt_staz);
    txt_staz.setColumns(10);

    txt_email = new JTextField();
    txt_email.setBounds(69, 155, 214, 19);
    contentPane.add(txt_email);
    txt_email.setColumns(10);

    txt_telefon = new JTextField();
    txt_telefon.setBounds(100, 182, 167, 19);
    contentPane.add(txt_telefon);
    txt_telefon.setColumns(10);

    txt_oblast = new JTextField();
    txt_oblast.setBounds(100, 209, 167, 19);
    contentPane.add(txt_oblast);
    txt_oblast.setColumns(10);
}

}

Answer 1

这绝对不是回答您问题的正确社区。说实话，我不确定我是否理解了……但无论如何，如果您想在此处插入数据库：

public void actionPerformed(ActionEvent e) {
            NOW HOW ????
                }
            });

您必须使 JFrame 可以访问数据库连接。然后创建准备好的语句并编写插入查询（参见此处的示例：例子。

而且...它会很丑陋。考虑重构代码以创建负责与数据库通信的服务层。