如何一次从JTable，数据库中删除多行

我想一次从JTable中删除几行，但我一次只能删除一行。 JTable一次只允许一个选择吗？ 如果我想通过选择删除多行，java允许我们这样做吗？ 即使我选择多行，给定的代码也只能一次删除一行。

DBConnection是一个连接到MySql数据库的类。

staffTable1是JTable的变量名

ShowStaffInStaffTable()是一个函数，通过使用Getter Setter类从MySql导入数据来更新我的JTable行和列

这是我尝试过的代码：

 int row = staffTable1.getSelectedRow(); DefaultTableModel model = (DefaultTableModel) staffTable1.getModel(); String selected = model.getValueAt(row, 9).toString(); if (row >= 0) { try { DBConnection DB12 = new DBConnection(); Connection conn = DB12.Connect(); String sql = "delete from staff where Contact_No= ?"; PreparedStatement stmt = conn.prepareStatement(sql); stmt.setString(1, selected); stmt.executeUpdate(); form12.ShowStaffInStaffTable(); } catch (Exception w) { JOptionPane.showMessageDialog(this, "Connection Error!"+w); w.printStackTrace(); } } 

Answer 1

以下显示如何从JTable（和JList）中删除多个选定的行：

 import java.awt.*; import java.awt.event.*; import java.util.Arrays; import java.util.ArrayList; import java.util.Collections; import java.util.List; import javax.swing.*; import javax.swing.table.*; public class ItemDeletion extends JPanel { private JList list; private JTable table; public ItemDeletion() { setLayout( new BorderLayout(5, 5) ); String[] items = { "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten" }; // Add the list DefaultListModel listModel = new DefaultListModel(); for (String item: items) listModel.addElement( item ); list = new JList( listModel ); JButton listDelete = new JButton( "Delete From List" ); listDelete.addActionListener( new ActionListener() { @Override public void actionPerformed(ActionEvent e) { DefaultListModel model = (DefaultListModel)list.getModel(); int row = list.getSelectedIndex(); while (row != -1) { model.removeElementAt( row ); row = list.getSelectedIndex(); } } }); JPanel listPanel = new JPanel( new BorderLayout(5, 5) ); listPanel.add(new JScrollPane( list ), BorderLayout.CENTER); listPanel.add(listDelete, BorderLayout.PAGE_END); // Add the table DefaultTableModel tableModel = new DefaultTableModel(0, 1); List tableItems = Arrays.asList( items ); Collections.shuffle( tableItems ); for (String item: tableItems) { System.out.println( item ); tableModel.addRow( new String[]{item} ); } table = new JTable( tableModel ); table.setAutoCreateRowSorter(true); ((DefaultRowSorter)table.getRowSorter()).toggleSortOrder(0); JButton tableDelete = new JButton( "Delete From Table" ); tableDelete.addActionListener( new ActionListener() { @Override public void actionPerformed(ActionEvent e) { DefaultTableModel model = (DefaultTableModel)table.getModel(); int row = table.getSelectedRow(); while (row != -1) { int modelRow = table.convertRowIndexToModel( row ); model.removeRow( modelRow ); row = table.getSelectedRow(); } } }); JPanel tablePanel = new JPanel( new BorderLayout(5, 5) ); tablePanel.add(new JScrollPane( table ), BorderLayout.CENTER); tablePanel.add(tableDelete, BorderLayout.PAGE_END); add(listPanel, BorderLayout.LINE_START); add(tablePanel, BorderLayout.LINE_END); } private static void createAndShowGUI() { JFrame frame = new JFrame("Multiple Item Deletion"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(new ItemDeletion(), BorderLayout.NORTH); frame.setLocationByPlatform( true ); frame.pack(); frame.setVisible( true ); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } } 

显然，您还需要修改代码以从数据库中删除该行。