java - 如何从 JTable 中的 JTextField 中检索值？

Question

让我把我的问题分成两部分。

1. 如何从 JTable 中的 JTextfiled 中检索值？
2. 所有的数据如何一次性存入数据库？

姓名和年龄应该在 jbutton1 操作上从 JTextfield 中检索并且通过单击jbutton2，Jtable 的所有数据都应存储在SQL DB 中。

下面是我的代码:

package tablefilterdemo;


public class Tableinputhroughtextbox extends javax.swing.JFrame {

    public Tableinputhroughtextbox() {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = new javax.swing.JTable();
        jButton1 = new javax.swing.JButton();
        jtfname = new javax.swing.JTextField();
        jtfage = new javax.swing.JTextField();
        jButton2 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jTable1.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {
                {null, null},
                {null, null},
                {null, null},
                {null, null}
            },
            new String [] {
                "Name", "Age"
            }
        ));
        jScrollPane1.setViewportView(jTable1);

        jButton1.setText("Submit for Table");

        jButton2.setText("Submit for SQL");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(29, 29, 29)
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(53, 53, 53)
                        .addComponent(jtfname, javax.swing.GroupLayout.PREFERRED_SIZE, 74, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(46, 46, 46)
                        .addComponent(jtfage, javax.swing.GroupLayout.PREFERRED_SIZE, 74, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jButton1)
                        .addGap(18, 18, 18)
                        .addComponent(jButton2)))
                .addContainerGap(82, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap(92, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton1)
                    .addComponent(jtfname, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jtfage, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jButton2))
                .addGap(47, 47, 47)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 322, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(19, 19, 19))
        );

        pack();
    }// </editor-fold>                        

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(Tableinputhroughtextbox.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Tableinputhroughtextbox.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Tableinputhroughtextbox.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Tableinputhroughtextbox.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Tableinputhroughtextbox().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable jTable1;
    private javax.swing.JTextField jtfage;
    private javax.swing.JTextField jtfname;
    // End of variables declaration                   
}

Answer 1

1) How to retrive value from textfiled in JTable?

我假设您指的是 JTextField？请注意您的拼写，因为编程是一项精确的练习，因此您不能在编码或问题时马虎。

正如教程告诉您的那样，您可以通过 getText() 获取文本方法。请看here .

2) After all the data how to store in database in one go?

请澄清您的问题。如果您正在寻找如何通过 Java 使用数据库，请查看 here . JTables和表格模型的使用请看here .我建议您将数据库代码与 Swing 代码分开，以帮助简化调试和编码。

---

编辑 1
关于将 JTable 与数据库一起使用，已针对此问题发布了大量答案，您最好在该站点上搜索这些答案。这不是一件小事，需要您进行一些研究。例如，请查看这些链接:

• Most simple code to populate JTable from ResultSet
• How to fill data in a JTable with database?
• JTable Swing retrieve data
• JDBC TableModel for a JTable in Java?

---

编辑2
您在评论中提问:

OK Let's stick one question.in above code I have create 2 JTexfield and and Button.Now here I want those retrieved data how can I show in Jtable?

如果您希望将来自两个 JTextField 的数据放在 JTable 的一行中，请考虑执行以下操作:

• 在按钮的 ActionListener 中，首先从 JTextFields 的文本中提取文本。
• 接下来您需要为 JTable 创建一个行，这意味着向 JTable 的模型添加一行。如何做到这一点将完全取决于 TableModel 的设置方式。
• 如果您使用的是 DefaultTableModel 对象，那么您需要创建一个 Vector<String>或字符串数​​组，将您的两个字符串放入 vector 或数组中，然后调用 addRow(rowData)在您的 DefaultTableModel 变量上。这假定 vector 或数组被命名为 rowData。
• 如果您使用的是基于 AbstractTableModel 的自定义 TableModel，那么您需要编写自己的 addRow(...)方法，您可能会传入一个自定义类的对象，该类包含您的两条数据。如果你走这条路，请确保你的 addRow(...)方法调用正确的 fireTableXXX(...)方法，这里是fireTableRowsInserted(int firstRow, int lastRow) .

但最重要的是，请务必阅读我在上面链接的 JTable 教程，否则我的回答对您来说没有意义。

---

编辑 3
例如，使用 DefaultTableModel:

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.util.Vector;

import javax.swing.*;
import javax.swing.table.DefaultTableModel;

@SuppressWarnings("serial")
public class MyTableEg extends JPanel {
   private static final String[] COLUMNS = {"Column A", "Column B"};
   private DefaultTableModel model = new DefaultTableModel(COLUMNS, 0);
   private JTable table = new JTable(model);
   private JTextField fieldA = new JTextField(10);
   private JTextField fieldB = new JTextField(10);
   private JButton button = new JButton(new ButtonAction("Add Data", KeyEvent.VK_A));

   public MyTableEg() {
      JPanel topPanel = new JPanel();
      topPanel.add(fieldA);
      topPanel.add(fieldB);
      topPanel.add(button);

      setLayout(new BorderLayout());
      add(topPanel, BorderLayout.NORTH);
      add(new JScrollPane(table), BorderLayout.CENTER);
   }

   private class ButtonAction extends AbstractAction {
      public ButtonAction(String name, int mnemonic) {
         super(name);
         putValue(MNEMONIC_KEY, mnemonic);
      }

      @Override
      public void actionPerformed(ActionEvent evt) {

         // ***** here's the important bit of code

         Vector<String> rowData = new Vector<String>();  // create a row Vector
         rowData.add(fieldA.getText());    // fill it with data from JTextFields
         rowData.add(fieldB.getText());
         model.addRow(rowData);            // and add to table model
      }
   }

   private static void createAndShowGui() {
      JFrame frame = new JFrame("MyTableEg");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.getContentPane().add(new MyTableEg());
      frame.pack();
      frame.setLocationRelativeTo(null);
      frame.setVisible(true);
   }

   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {
         public void run() {
            createAndShowGui();
         }
      });
   }
}