Question

有一个简单的JTable，试图在编辑后获取最新的列值。

＆＃34;将文件添加到表格＆＃34;按钮将从JTextField加载文件名和路径到JTable

＆＃34;从表中获取值＆＃34;按钮将（尝试）获取JTable中的所有列值。

在last column edited之后，按下＆＃34;从表中获取值＆＃34;按钮只返回前三列但不返回已编辑的列，最后一列不返回任何内容！

如何获取编辑后的列值？

代码

import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.io.File;
import java.nio.file.Path;
import java.util.Vector;

public class viewTable {

    private JFrame frame;
    private JTextField textField;
    private JTable table;
    private static DefaultTableModel model;
    private static File file;

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    viewTable window = new viewTable();
                    window.frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public viewTable() {
        initialize();
    }
    private void initialize() {
        frame = new JFrame();
        frame.getContentPane().setLayout(null);

        textField = new JTextField("C:\\Temp\\Temp.docx");
        textField.setBounds(159, 23, 393, 20);
        frame.getContentPane().add(textField);
        textField.setColumns(10);

        JButton btnAddFileTo = new JButton("Add File to Table");
        btnAddFileTo.setBounds(383, 54, 165, 23);
        frame.getContentPane().add(btnAddFileTo);
        btnAddFileTo.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                addFileToTable();   
            }

            private void addFileToTable() {
                file = new File(textField.getText());
                final Object[] rowEntries = new Object[4];
                int tableIndex = table.getRowCount();
                tableIndex = tableIndex + 1;
                if (tableIndex <= 9){rowEntries[0] = "0"+tableIndex+".";}
                else {rowEntries[0] = tableIndex+".";}

                Path fileNameAlone = file.toPath();

                fileNameAlone = fileNameAlone.getFileName();
                rowEntries[1] = fileNameAlone;
                rowEntries[2] = file;
                rowEntries[3] = "";
                model.addRow(rowEntries);
            }

        });

        table = new JTable(5,4);
        Object[] columnNames = { "Sl.no.", "File", "Path/Name", "Page no. to be added" };

        model = new DefaultTableModel();
        model.setColumnIdentifiers(columnNames);
        table.setModel(model);

        JScrollPane scrollTable = new JScrollPane(table);
        scrollTable.setBounds(111, 100, 464, 213);

        frame.getContentPane().add(scrollTable);

        JButton btnNewButton = new JButton("Get Values from the table");
        btnNewButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                DefaultTableModel model1 = (DefaultTableModel)table.getModel();
                Vector pageNoData = model1.getDataVector();
                String pageNo; 

                pageNo = getPageNoValueFromTable(pageNoData, table);
                System.out.println("pageNo : "+pageNo);
            }
        });
        btnNewButton.setBounds(319, 349, 256, 23);
        frame.getContentPane().add(btnNewButton);
        frame.setBounds(100, 100, 725, 494);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


    }

    public static String getPageNoValueFromTable(Vector itemData, JTable table){
        table.setRowSelectionInterval(0, 0);
        table.repaint();

        System.out.println(table.getModel().getValueAt(0, 3));

        //int myListCount = 0;
        DefaultTableModel model1 = (DefaultTableModel)table.getModel();
        Vector pageNoData = model1.getDataVector();

        String mySelectedPageNo = null;

        for(int i=0; i<pageNoData.size(); i++){
            Vector getItem = (Vector) pageNoData.get(i);
            for (int j=0; j<getItem.size(); j++){
                if (j == 3)
                    mySelectedPageNo = getItem.get(j).toString();
                System.out.println("getItem : "+getItem.get(j).toString());}
            }
        return mySelectedPageNo;
    }
}

输出

getItem : 01.
getItem : Temp.docx
getItem : C:\Temp\Temp.docx
getItem : ?
pageNo : ?

请告诉我这方面的指示！感谢

Answer 1

在JTable中编辑单元格时，表格不知道用户何时完成单元格的编辑。因此，用户有责任告诉表何时停止编辑。这通常由以下人员完成：

使用回车键或Tab键到下一个单元格或用鼠标单击另一个单元格

您需要向ActionListener

添加一些代码

if (table.isEditing())
    table.getCellEditor().stopCellEditing();

我的书签here中的一篇好文章：

在编辑表后从JTable获取列值

1 个答案: