从jframe传递值到另一个

Question

我有两个jframes，并希望从jpanel从第一个jframe传递值到第二个jframe中的一个sql查询。

package gestioner; 

import java.awt.BorderLayout; 
import java.awt.EventQueue; 

import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.border.EmptyBorder; 
import javax.swing.table.DefaultTableCellRenderer; 

import net.proteanit.sql.DbUtils; 
import javax.swing.JLabel; 
import javax.swing.JOptionPane; 
import javax.swing.JTextField; 
import javax.swing.JButton; 
import javax.swing.JScrollPane; 
import javax.swing.JTable; 
import java.awt.event.ActionListener; 
import java.sql.Connection; 
import java.sql.PreparedStatement; 
import java.sql.ResultSet; 
import java.awt.event.ActionEvent; 
import java.awt.event.MouseAdapter; 
import java.awt.event.MouseEvent; 
import java.awt.event.KeyAdapter; 
import java.awt.event.KeyEvent; 

public class Customers extends JFrame { 

private JPanel contentPane; 
private JLabel lblFullName; 
private JTextField funame; 
private JLabel lblEmail; 
private JTextField email; 
private JLabel lblAdresse; 
private JTextField adresse; 
private JLabel lblTel; 
private JTextField tel; 
private JButton button; 
private JButton button_1; 
private JButton button_2; 
private JButton btnShowAll; 
private JLabel label_4; 
private JTextField search; 
private JTable table; 
private JScrollPane scrollPane; 

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

Connection con = null; 
PreparedStatement pst = null; 
ResultSet rs = null; 
public JLabel id; 
private JButton btnSales; 

public String getLab() { 
    // String z =funame.getText(); 
    return funame.getText(); 
} 

public void fillTable() { 

    try { 
     String query = "select * from customers"; 
     pst = con.prepareStatement(query); 
     rs = pst.executeQuery(); 
     table.setModel(DbUtils.resultSetToTableModel(rs)); 

     // center allignment 
     ((DefaultTableCellRenderer) table.getTableHeader().getDefaultRenderer()) 
       .setHorizontalAlignment((int) JLabel.CENTER_ALIGNMENT); 
     DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer(); 
     centerRenderer.setHorizontalAlignment(JLabel.CENTER); 
     table.getColumnModel().getColumn(0).setCellRenderer(centerRenderer); 
     for (int x = 0; x < table.getColumnCount(); x++) { 
      table.getColumnModel().getColumn(x).setCellRenderer(centerRenderer); 
     } 

    } catch (Exception ex) { 

     JOptionPane.showMessageDialog(this, ex.getMessage()); 
    } 

} 

public Customers() { 

    con = Connectdb.connect(); 

    setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); 
    setBounds(100, 100, 867, 492); 
    contentPane = new JPanel(); 
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); 
    setContentPane(contentPane); 
    contentPane.setLayout(null); 

    lblFullName = new JLabel("Full Name"); 
    lblFullName.setBounds(20, 92, 78, 14); 
    contentPane.add(lblFullName); 

    funame = new JTextField(); 
    funame.setColumns(10); 
    funame.setBounds(116, 89, 125, 20); 
    contentPane.add(funame); 

    lblEmail = new JLabel("Email"); 
    lblEmail.setBounds(20, 120, 78, 14); 
    contentPane.add(lblEmail); 

    email = new JTextField(); 
    email.setColumns(10); 
    email.setBounds(116, 117, 125, 20); 
    contentPane.add(email); 

    lblAdresse = new JLabel("Adresse"); 
    lblAdresse.setBounds(20, 148, 78, 14); 
    contentPane.add(lblAdresse); 

    adresse = new JTextField(); 
    adresse.setColumns(10); 
    adresse.setBounds(116, 145, 125, 20); 
    contentPane.add(adresse); 

    lblTel = new JLabel("Tel"); 
    lblTel.setBounds(20, 176, 78, 14); 
    contentPane.add(lblTel); 

    tel = new JTextField(); 
    tel.setColumns(10); 
    tel.setBounds(116, 173, 125, 20); 
    contentPane.add(tel); 

    button = new JButton("Add"); 
    button.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 

      try { 

       String query = "Insert into customers (fullname,email,adress,tele) values (?,?,?,?)"; 
       pst = con.prepareStatement(query); 
       pst.setString(1, funame.getText()); 
       pst.setString(2, email.getText()); 
       pst.setString(3, adresse.getText()); 
       pst.setString(4, tel.getText()); 
       pst.execute(); 
       fillTable(); 
       funame.setText(""); 
       email.setText(""); 
       adresse.setText(""); 
       tel.setText(""); 
       id.setText(""); 

      } catch (Exception ex) { 

       JOptionPane.showMessageDialog(null, ex.getMessage()); 
      } 

     } 
    }); 
    button.setBounds(20, 213, 89, 23); 
    contentPane.add(button); 

    button_1 = new JButton("Edit"); 
    button_1.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 

      try { 

       String query = "update customers set fullname= '" + funame.getText() + "' , email= '" 
         + email.getText() + "' , adress= '" + adresse.getText() + "', tele= '" + tel.getText() 
         + "' where id= '" + id.getText() + "' "; 
       pst = con.prepareStatement(query); 

       // pst.setString(1, funame.getText()); 
       // pst.setString(2, email.getText()); 
       // pst.setString(3, adresse.getText()); 
       // pst.setString(4, tel.getText()); 
       pst.execute(); 
       fillTable(); 

       funame.setText(""); 
       email.setText(""); 
       adresse.setText(""); 
       tel.setText(""); 
       id.setText(""); 

      } catch (Exception ex) { 
       JOptionPane.showMessageDialog(null, ex.getMessage()); 
      } 

     } 
    }); 
    button_1.setBounds(152, 213, 89, 23); 
    contentPane.add(button_1); 

    button_2 = new JButton("Delete"); 
    button_2.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 

      try { 

       String query = "delete from customers where id='" + id.getText() + "'"; 
       pst = con.prepareStatement(query); 
       pst.execute(); 
       fillTable(); 
       funame.setText(""); 
       adresse.setText(""); 
       tel.setText(""); 
       email.setText(""); 
       id.setText(""); 

      } catch (Exception ex) { 
       JOptionPane.showMessageDialog(null, ex.getMessage()); 
      } 

     } 
    }); 
    button_2.setBounds(20, 247, 89, 23); 
    contentPane.add(button_2); 

    btnShowAll = new JButton("Show All"); 
    btnShowAll.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 

      try { 

       String query = "select * from customers"; 
       pst = con.prepareStatement(query); 
       rs = pst.executeQuery(); 
       table.setModel(DbUtils.resultSetToTableModel(rs)); 

       ((DefaultTableCellRenderer) table.getTableHeader().getDefaultRenderer()) 
         .setHorizontalAlignment((int) JLabel.CENTER_ALIGNMENT); 
       DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer(); 
       centerRenderer.setHorizontalAlignment(JLabel.CENTER); 
       table.getColumnModel().getColumn(0).setCellRenderer(centerRenderer); 
       for (int x = 0; x < table.getColumnCount(); x++) { 
        table.getColumnModel().getColumn(x).setCellRenderer(centerRenderer); 
       } 

       pst.close(); 
       rs.close(); 

      } catch (Exception ex) { 

       JOptionPane.showMessageDialog(null, ex.getMessage()); 

      } 

     } 
    }); 
    btnShowAll.setBounds(733, 386, 89, 23); 
    contentPane.add(btnShowAll); 

    label_4 = new JLabel("Search"); 
    label_4.setBounds(647, 35, 61, 14); 
    contentPane.add(label_4); 

    search = new JTextField(); 
    search.addKeyListener(new KeyAdapter() { 
     @Override 
     public void keyReleased(KeyEvent arg0) { 

      try { 

       if (search.getText().equals("")) { 
        fillTable(); 
       } else { 
        String query = "select * from customers where id like ? or fullname like ? or tele like ? "; 
        pst = con.prepareStatement(query); 
        pst.setString(1, search.getText() + "%"); 
        pst.setString(2, search.getText() + "%"); 
        pst.setString(3, search.getText() + "%"); 
        rs = pst.executeQuery(); 
        table.setModel(DbUtils.resultSetToTableModel(rs)); 
       } 

      } catch (Exception e) { 
       JOptionPane.showMessageDialog(null, e.getMessage()); 
      } 

     } 
    }); 
    search.setColumns(10); 
    search.setBounds(699, 32, 123, 20); 
    contentPane.add(search); 

    scrollPane = new JScrollPane(); 
    scrollPane.setBounds(271, 62, 551, 309); 
    contentPane.add(scrollPane); 

    table = new JTable(); 
    table.addMouseListener(new MouseAdapter() { 
     @Override 
     public void mouseClicked(MouseEvent e) { 

      try { 

       int row = table.getSelectedRow(); 
       String table_click = table.getModel().getValueAt(row, 0).toString(); 
       String query = "select * from customers where id= '" + table_click + "'"; 
       pst = con.prepareStatement(query); 
       rs = pst.executeQuery(); 

       if (rs.next()) { 
        String add1 = rs.getString("id"); 
        id.setText(add1); 
        String add2 = rs.getString("fullname"); 
        funame.setText(add2); 
        String add3 = rs.getString("email"); 
        email.setText(add3); 
        String add4 = rs.getString("adress"); 
        adresse.setText(add4); 
        String add5 = rs.getString("tele"); 
        tel.setText(add5); 

       } 

      } catch (Exception ex) { 

       JOptionPane.showMessageDialog(null, ex.getMessage()); 
      } 

     } 
    }); 
    scrollPane.setViewportView(table); 

    id = new JLabel(""); 
    id.setBounds(116, 64, 125, 14); 
    contentPane.add(id); 

    btnSales = new JButton("Sales"); 
    btnSales.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 

      new Showsales().setVisible(true); 

     } 
    }); 
    btnSales.setBounds(152, 247, 89, 23); 
    contentPane.add(btnSales); 
} 

} 

第二JFrame的

package gestioner; 

import java.awt.BorderLayout; 
import java.awt.EventQueue; 

import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JOptionPane; 
import javax.swing.JPanel; 
import javax.swing.border.EmptyBorder; 
import javax.swing.table.DefaultTableCellRenderer; 

import net.proteanit.sql.DbUtils; 

import javax.swing.JTable; 
import javax.swing.JScrollPane; 
import javax.swing.JButton; 
import java.awt.event.ActionListener; 
import java.sql.Connection; 
import java.sql.PreparedStatement; 
import java.sql.ResultSet; 
import java.awt.event.ActionEvent; 
import javax.swing.JTextField; 

public class Showsales extends JFrame { 

private JPanel contentPane; 
private JTable table; 
private JScrollPane scrollPane; 
private JButton btnShowAll; 

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

Connection con = null; 
PreparedStatement pst = null; 
ResultSet rs = null; 
private JLabel lblSearch; 
private JTextField search; 

public void fillTable() { 

    try { 

     String query = "select * from sales where customerid="; 
     pst = con.prepareStatement(query); 
     rs = pst.executeQuery(); 
     table.setModel(DbUtils.resultSetToTableModel(rs)); 

     ((DefaultTableCellRenderer) table.getTableHeader().getDefaultRenderer()) 
       .setHorizontalAlignment((int) JLabel.CENTER_ALIGNMENT); 
     DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer(); 
     centerRenderer.setHorizontalAlignment(JLabel.CENTER); 
     table.getColumnModel().getColumn(0).setCellRenderer(centerRenderer); 
     for (int x = 0; x < table.getColumnCount(); x++) { 
      table.getColumnModel().getColumn(x).setCellRenderer(centerRenderer); 
     } 

     pst.close(); 
     rs.close(); 

    } catch (Exception ex) { 

     JOptionPane.showMessageDialog(null, ex.getMessage()); 

    } 

} 

public Showsales() { 

    con = Connectdb.connect(); 

    setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); 
    setBounds(100, 100, 868, 495); 
    contentPane = new JPanel(); 
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); 
    setContentPane(contentPane); 
    contentPane.setLayout(null); 

    scrollPane = new JScrollPane(); 
    scrollPane.setBounds(232, 40, 610, 363); 
    contentPane.add(scrollPane); 

    table = new JTable(); 
    scrollPane.setViewportView(table); 

    btnShowAll = new JButton("Show All"); 
    btnShowAll.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 

      try { 

       String query = "select * from sales"; 
       pst = con.prepareStatement(query); 
       rs = pst.executeQuery(); 
       table.setModel(DbUtils.resultSetToTableModel(rs)); 

       ((DefaultTableCellRenderer) table.getTableHeader().getDefaultRenderer()) 
         .setHorizontalAlignment((int) JLabel.CENTER_ALIGNMENT); 
       DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer(); 
       centerRenderer.setHorizontalAlignment(JLabel.CENTER); 
       table.getColumnModel().getColumn(0).setCellRenderer(centerRenderer); 
       for (int x = 0; x < table.getColumnCount(); x++) { 
        table.getColumnModel().getColumn(x).setCellRenderer(centerRenderer); 
       } 

       pst.close(); 
       rs.close(); 

      } catch (Exception ex) { 

       JOptionPane.showMessageDialog(null, ex.getMessage()); 

      } 

     } 
    }); 
    btnShowAll.setBounds(717, 423, 125, 23); 
    contentPane.add(btnShowAll); 

    lblSearch = new JLabel("Search"); 
    lblSearch.setBounds(609, 15, 65, 14); 
    contentPane.add(lblSearch); 

    search = new JTextField(); 
    search.setBounds(684, 12, 158, 20); 
    contentPane.add(search); 
    search.setColumns(10); 
} 

} 

，所以我想，当用户点击按钮的销售，我们采取ID标签的价值，并把它放在一个sql查询在第二JFrame中：

String = "select * from sales where cusotmerid='"+id+"'"; 

并执行它并在点击按钮销售时自动显示表格。

Answer 1

你有两个应用程序？我在示例代码中看到两个主要函数，那么您是否想要将第一个应用中的第一个jframe的值传递给第二个jframe？ 如果你只是想通过从一个应用一个JFrame到其它的值，你可以这样说：

class Frame1 extends JFrame { 
    private JLabel idLabel; 
    public Frame1() { 
     ......... 
     gotoSecondFrame.addActionListener(new ActionListener() { 
      @Override 
      public void actionPerformed(ActionEvent e) { 
       int id = Integer.parseInt(idLabel.getText());// just get id value from jlabel 
       JFrame2 frame = new JFram2(id);// then pass to second jframe 
       frame.setVisible(true);// show second jframe 
      } 
     }); 
     ........ 
    } 
} 

class Frame2 extends JFrame { 
    private void query(int id) { 
     ....... 
    } 
    public Frame2(int id) { 
     ....... 
     query(id);// your query with id which passed from first jframe 
     ....... 
    } 
} 

Answer 2

您可以从FirstJFrame传递价值使用SecondJFrame的构造

FirstJFrame.java

到SecondJFrame

public class FirstJFrame extends javax.swing.JFrame { 

    JButton btn = new JButton("Send Value"); 

    public FirstJFrame() { 

     getContentPane().add(btn); 

    } 
    private void btnActionPerformed(java.awt.event.ActionEvent evt) {             
     SecondJFrame secondFrame = new SecondJFrame(13); 
// 13 is the value 

     secondFrame.setVisible(true); 

    } 
} 

SecondJFrame.java

public class SecondJFrame extends javax.swing.JFrame { 

    int id = 0; 

    public SecondJFrame (int idValue) { 

      int id = idValue; 

      System.out.println(id); 
    } 

}