如何在我的JTable上添加複選框？

Question

這是一個拖放的Java Swing

這裏是我的代碼

prod.removeColumn(prod.getColumnModel().getColumn(0)); 

    String sql = "select prod_id,prod_description,prod_wh_name,prod_fr_name from product order by prod_description asc"; 
    PreparedStatement pst = con.prepareStatement(sql); 
    ResultSet rs = pst.executeQuery(); 
    while(rs.next()) 
    { 
     int columns = rs.getMetaData().getColumnCount(); 
     Object[] row = new Object[columns]; 
     for(int i = 1 ; i <=columns;i++) 
     { 
      row[i - 1] = rs.getObject(i); 
     } 
     ((DefaultTableModel) prod.getModel()).insertRow(rs.getRow() -1,row); 
    } 

我想在JTable中（產品說明）添加在每個數據左側的複選框，對於任何解決方案？並可以選擇多個？以及如何獲取所選項目的數據？提前致謝！

Answer 1

一種方法是創建一個「包裝器」TableModel。

在這個例子中包含複選標記欄將被添加到列的左側中的任何現有的TableModel：

import java.awt.*; 
import java.awt.event.*; 
import java.util.*; 
import javax.swing.*; 
import javax.swing.table.*; 

public class CheckBoxWrapperTableModel extends AbstractTableModel 
{ 
    private ArrayList<Boolean> checkBoxes = new ArrayList<>(); 

    private DefaultTableModel model; 
    private String columnName; 

    public CheckBoxWrapperTableModel(DefaultTableModel model, String columnName) 
    { 
     this.model = model; 
     this.columnName = columnName; 

     for (int i = 0; i < model.getRowCount(); i++) 
      checkBoxes.add(Boolean.FALSE); 
    } 

    @Override 
    public String getColumnName(int column) 
    { 
     return (column > 0) ? model.getColumnName(column - 1) : columnName; 
    } 

    @Override 
    public int getRowCount() 
    { 
     return model.getRowCount(); 
    } 

    @Override 
    public int getColumnCount() 
    { 
     return model.getColumnCount() + 1; 
    } 

    @Override 
    public Object getValueAt(int row, int column) 
    { 
     if (column > 0) 
      return model.getValueAt(row, column - 1); 
     else 
     { 
      Object value = checkBoxes.get(row); 
      return (value == null) ? Boolean.FALSE : value; 
     } 
    } 

    @Override 
    public boolean isCellEditable(int row, int column) 
    { 
     if (column > 0) 
      return model.isCellEditable(row, column - 1); 
     else 
      return true; 
    } 

    @Override 
    public void setValueAt(Object value, int row, int column) 
    { 
     if (column > 0) 
      model.setValueAt(value, row, column - 1); 
     else 
     { 
      checkBoxes.set(row, (Boolean)value); 
     } 

     fireTableCellUpdated(row, column); 
    } 

    @Override 
    public Class getColumnClass(int column) 
    { 
     return (column > 0) ? model.getColumnClass(column - 1) : Boolean.class; 
    } 

    public void removeRow(int row) 
    { 
     checkBoxes.remove(row); 
     fireTableRowsDeleted(row, row); 
     model.removeRow(row); 
    } 

    private static void createAndShowGUI() 
    { 
     // Create the table with check marks in the first column 

     DefaultTableModel model = new DefaultTableModel(5, 1); 

     for (int i = 0; i < model.getRowCount(); i++) 
     { 
      model.setValueAt("" + i, i, 0); 
     } 

     CheckBoxWrapperTableModel wrapperModel = new CheckBoxWrapperTableModel(model, "Select"); 
     JTable table = new JTable(wrapperModel); 

     // Add button to delete selected rows 

     JButton button = new JButton("Delete Selected Rows"); 
     button.addActionListener(new ActionListener() 
     { 
      @Override 
      public void actionPerformed(ActionEvent e) 
      { 
       for (int i = table.getRowCount() - 1; i >= 0; i--) 
       { 
        Boolean selected = (Boolean)table.getValueAt(i, 0); 
        System.out.println(selected + " : " + i); 

        if (selected) 
        { 
         wrapperModel.removeRow(i); 
        } 

       } 
      } 
     }); 

     JFrame frame = new JFrame("SSCCE"); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     frame.add(new JScrollPane(table)); 
     frame.add(button, BorderLayout.PAGE_END); 
     frame.pack(); 
     frame.setLocationByPlatform(true); 
     frame.setVisible(true); 
    } 

    public static void main(String[] args) 
    { 
     EventQueue.invokeLater(() -> createAndShowGUI()); 
/* 
     EventQueue.invokeLater(new Runnable() 
     { 
      public void run() 
      { 
       createAndShowGUI(); 
      } 
     }); 
*/ 
    } 
} 

這允許您添加，即使你沒有訪問複選框當創建它時添加自己的複選框列的原始TableModel。