Question

我有一个带有行分拣机的表 - ＆gt;我附加了侦听器的setAutoCreateRowSorter(true);和ListSelectionModel。如果我对它进行排序（通过单击标题）。

tableProducts=new JTable(table_modelProducts);
tableProducts.setAutoCreateRowSorter(true);
cellSelectionModelProducts = tableProducts.getSelectionModel();
cellSelectionModelProducts.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

问题是，如果对它进行排序然后单击一个单元格，它将返回位于该位置的原始值（表排序之前的那个）：

if(arg0.getValueIsAdjusting()){
    System.out.println(String.valueOf(tableProducts.getModel().getValueAt(tableProducts.getSelectedRow(), 1)));
}

Answer 1

如果您阅读java代码，则getSelectedRow（）在选择模型上，而getModel（）返回数据模型。数据模型和选择模型是2种不同的模型，这就是为什么您无法获得正确的索引的原因。

正确的解决方案是调用JTable.getRowSorter（）。convertRowIndexToModel（）来获取数据模型索引。分拣机是将基础数据模型混合到视图模型中的分拣机。逻辑思考，它必须是维护2个模型之间映射的那个。所以你的代码应该是

System.out.println(String.valueOf(tableProducts.getModel()
  .getValueAt(tableProducts.getRowSorter().convertRowIndexToModel(
  tableProducts.getSelectedRow()), 1)));

以Java Tutorial中的JTable示例为基础，参见 System.out.println（＆＃34; Right Value =＆＃34;）的行，如何调用上述方法，完整代码在这里。它是可执行的，您可以通过启动应用程序来测试它，单击姓氏列标题，然后单击每个姓氏，观察控制台输出。

import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

/*
 * SimpleTableDemo.java requires no other files.
 */

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class SimpleTableDemo extends JPanel {
    private boolean DEBUG = false;

    public SimpleTableDemo() {
        super(new GridLayout(1,0));

        String[] columnNames = {"First Name",
                                "Last Name",
                                "Sport",
                                "# of Years",
                                "Vegetarian"};

        Object[][] data = {
        {"Kathy", "Smith",
         "Snowboarding", new Integer(5), new Boolean(false)},
        {"John", "Doe",
         "Rowing", new Integer(3), new Boolean(true)},
        {"Sue", "Black",
         "Knitting", new Integer(2), new Boolean(false)},
        {"Jane", "White",
         "Speed reading", new Integer(20), new Boolean(true)},
        {"Joe", "Brown",
         "Pool", new Integer(10), new Boolean(false)}
        };

        final JTable table = new JTable(data, columnNames);
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));
        table.setAutoCreateRowSorter(true);
        table.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {

            @Override
            public void valueChanged(ListSelectionEvent e) {
                if(e.getValueIsAdjusting()) {
                    System.out.println("Wrong Value = " + String.valueOf(table.getModel().getValueAt(table.getSelectedRow(), 1)));
                    System.out.println("Right Value = " + String.valueOf(table.getModel().getValueAt(table.getRowSorter().convertRowIndexToModel(table.getSelectedRow()), 1)));
                }
            }

        });
        table.setFillsViewportHeight(true);

        if (DEBUG) {
            table.addMouseListener(new MouseAdapter() {
                public void mouseClicked(MouseEvent e) {
                    printDebugData(table);
                }
            });
        }

        //Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);

        //Add the scroll pane to this panel.
        add(scrollPane);
    }

    private void printDebugData(JTable table) {
        int numRows = table.getRowCount();
        int numCols = table.getColumnCount();
        javax.swing.table.TableModel model = table.getModel();

        System.out.println("Value of data: ");
        for (int i=0; i < numRows; i++) {
            System.out.print("    row " + i + ":");
            for (int j=0; j < numCols; j++) {
                System.out.print("  " + model.getValueAt(i, j));
            }
            System.out.println();
        }
        System.out.println("--------------------------");
    }

    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("SimpleTableDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Create and set up the content pane.
        SimpleTableDemo newContentPane = new SimpleTableDemo();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

Java排序表监听器

1 个答案: