如文本文件中所示格式化JTable？

Question

您好我正在将文本文件读入JTable，但这是我的JTable现在的样子：

如何正确格式化并允许用户编辑JTable？

我的文本文件：文件名（people.txt）

COLUMN_NAME COLUMN_TYPE IS_NULLABLE COLUMN_KEY  COLUMN_DEFAULT  EXTRA   
Names   VARCHAR(500)    NO  
Address VARCHAR(500)    NO

到目前为止的编码：

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

   public class stackq extends AbstractTableModel {
    Vector data;
    Vector columns;

    public stackq() {
            String line;
            data = new Vector();
            columns = new Vector();
            try {
                    FileInputStream fis = new FileInputStream("D:/joy/text/people.txt");
                    BufferedReader br = new BufferedReader(new InputStreamReader(fis));
                    StringTokenizer st1 = new StringTokenizer(br.readLine(), " ");
                    while (st1.hasMoreTokens())
                            columns.addElement(st1.nextToken());
                    while ((line = br.readLine()) != null) {
                            StringTokenizer st2 = new StringTokenizer(line, " ");
                            while (st2.hasMoreTokens())
                                    data.addElement(st2.nextToken());
                    }
                    br.close();
            } catch (Exception e) {
                    e.printStackTrace();
            }
    }

    public int getRowCount() {
            return data.size() / getColumnCount();
    }

    public int getColumnCount() {
            return columns.size();
    }

    public Object getValueAt(int rowIndex, int columnIndex) {
            return (String) data.elementAt((rowIndex * getColumnCount())
                            + columnIndex);
    }

     public String getColumnName(int i){
         return (String)columns.get(i);
              }


      public static void main(String s[]) {
            stackq model = new stackq();
            JTable table = new JTable();
            table.setModel(model);
           JScrollPane scrollpane = new JScrollPane(table);
            JPanel panel = new JPanel();
            panel.add(scrollpane);
            JFrame frame = new JFrame();
            frame.add(panel, "Center");
            frame.pack();
            frame.setVisible(true);
         }
      }

非常感谢你。

Answer 1

public Stackq() {
String line;
data = new Vector();
columns = new Vector();
int count = 0;
try {
    FileInputStream fis = new FileInputStream("D:\\1.txt");
    BufferedReader br = new BufferedReader(new InputStreamReader(fis));
    StringTokenizer st1 = new StringTokenizer(br.readLine(), " ");
    while (st1.hasMoreTokens()) {
    columns.addElement(st1.nextToken());
    count++;
    }
    while ((line = br.readLine()) != null) {
    StringTokenizer st2 = new StringTokenizer(line, " ");
    for (int i = 0; i < count; i++) {
        if (st2.hasMoreTokens())
        data.addElement(st2.nextToken());
        else
        data.addElement("");
    }
    }
    br.close();
} catch (Exception e) {
    e.printStackTrace();
}
}

只需为标头计数添加一个计数变量，并将空字符串添加到tokenizer返回null的数据向量中。

Answer 2

为什么不使用DefaultTableModel来表示表格中的数据？它将为您处理所有与Swing相关的内容，您可以分别使用addColumn(Object)和addRow(Object[])轻松地向其中添加列或行。

首先，您将创建一个DefaultTableModel对象。

然后，您只需填写Vector columns

，而不是创建model。

model.addColumn(st1.nextToken()); // (for adding a column)

或

Vector row = new Vector();
StringTokenizer st2 = new StringTokenizer(line, " ");
while (st2.hasMoreTokens()) {
    row.add(st2.nextToken());
}
result.addRow(row); // for adding a row

Answer 3

尝试此操作如果您正在使用NetBean，您可以将List of Object绑定到表，并使用相应值 empMList 将Bind列绑定到Employee列表。

org.jdesktop.swingbinding.JTableBinding jTableBinding = org.jdesktop.swingbinding.SwingBindings.createJTableBinding(org.jdesktop.beansbinding.AutoBinding.UpdateStrategy.READ_WRITE, empMList, jTable1);
        org.jdesktop.swingbinding.JTableBinding.ColumnBinding columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${address}"));
        columnBinding.setColumnName("Address");
        columnBinding.setColumnClass(String.class);
        columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${name}"));
        columnBinding.setColumnName("Employee Name");
        columnBinding.setColumnClass(String.class);
        columnBinding.setEditable(false);
        bindingGroup.addBinding(jTableBinding);