如何使用JTable显示数据

偏执的太偏执、 2023-10-05 19:09 14阅读 0赞

在本教程中，您将学习如何在Java swing应用程序中使用***JTable***类创建用于显示表格数据的表。

JTable类表示Swing表组件。JTable提供了丰富的功能来管理表组件的外观和行为。JTable直接扩展*JComponent*并实现几个模型侦听器接口，例如*TableModelListener*，*TableColumnModelListener*，*ListSelectionListener* …等。JTable还实现可滚动的接口，因此表通常放在*JScrollPane中*。

每个JTable都有三个模型*TableModel*，*TableColumnModel*和*ListSelectionModel*。

*  TableModel用于指定如何存储表数据以及如何检索该数据。JTable的数据通常采用二维结构，例如二维数组或Vectors。TableModel还用于指定如何在Table中编辑数据。
 *  TableColumnModel用于管理所有TableColumn的列选择，列顺序和边距大小。
 *  ListSelectionModel允许表具有不同的选择模式，例如单个，单个间隔和多个间隔选择。

我们可以通过使用其构造函数来创建表，如下所示：

<table> 
 <thead> 
 <tr> 
 <th style="vertical-align:baseline;">JTable构造函数</th> 
 <th style="vertical-align:baseline;">描述</th> 
 </tr> 
 </thead> 
 <tbody> 
 <tr> 
 <td style="border-color:#dddddd;vertical-align:baseline;">JTable（）</td> 
 <td style="border-color:#dddddd;vertical-align:baseline;">创建一个空表</td> 
 </tr> 
 <tr> 
 <td style="border-color:#dddddd;vertical-align:baseline;">JTable（int行，int列）</td> 
 <td style="border-color:#dddddd;vertical-align:baseline;">创建一个具有行和列为空单元格的表。</td> 
 </tr> 
 <tr> 
 <td style="border-color:#dddddd;vertical-align:baseline;">JTable（Object [] []数据，Object []标题）</td> 
 <td style="border-color:#dddddd;vertical-align:baseline;">创建具有在二维数组数据中指定的&nbsp;数据&nbsp;和列&nbsp;标题的表</td> 
 </tr> 
 <tr> 
 <td style="border-color:#dddddd;vertical-align:baseline;">JTable（TableModel dm）</td> 
 <td style="border-color:#dddddd;vertical-align:baseline;">使用给定的TableModel创建一个表</td> 
 </tr> 
 <tr> 
 <td style="border-color:#dddddd;vertical-align:baseline;">JTable（TableModel dm，TableColumnModel cm）</td> 
 <td style="border-color:#dddddd;vertical-align:baseline;">使用给定的TableModel和TableColumnModel创建一个表。</td> 
 </tr> 
 <tr> 
 <td style="border-color:#dddddd;vertical-align:baseline;">JTable（TableModel dm，TableColumnModel cm，ListSelectionModel sm）</td> 
 <td style="border-color:#dddddd;vertical-align:baseline;">使用给定的TableModel，TableColumnModel和ListSelectionModel创建一个表。</td> 
 </tr> 
 <tr> 
 <td style="border-color:#dddddd;vertical-align:baseline;">JTable（矢量数据，矢量标题）</td> 
 <td style="border-color:#dddddd;vertical-align:baseline;">&nbsp;用Vectors数据的vector&nbsp;和列标题&nbsp;headin中的数据创建一个表&nbsp;。</td> 
 </tr> 
 </tbody> 
</table>

### 使用JTable显示股票报价的示例 ###

在此示例中，我们将使用JTable类在表格中显示股票报价。

*  首先，我们在*columns* 数组中指定列标题 。
 *  然后，我们使用二维数组 *数据* 来存储股票报价数据。
 *  接下来，我们通过将表数据和列标题传递给构造函数来创建JTable的实例。
 *  最后，我们放置表JScrollPane并将其添加到主框架。

这是JTable演示应用程序的屏幕截图：

[![JTable演示][JTable]][JTable_JTable]

<table style="margin-left:0px;"> 
 <tbody> 
 <tr> 
 <td style="vertical-align:top;"> 
 <div style="margin-left:0px;"> 
 <div style="margin-left:0px;"> 
 1 
 </div> 
 <div style="margin-left:0px;"> 
 2 
 </div> 
 <div style="margin-left:0px;"> 
 3 
 </div> 
 <div style="margin-left:0px;"> 
 4 
 </div> 
 <div style="margin-left:0px;"> 
 5 
 </div> 
 <div style="margin-left:0px;"> 
 6 
 </div> 
 <div style="margin-left:0px;"> 
 7 
 </div> 
 <div style="margin-left:0px;"> 
 8 
 </div> 
 <div style="margin-left:0px;"> 
 9 
 </div> 
 <div style="margin-left:0px;"> 
 10 
 </div> 
 <div style="margin-left:0px;"> 
 11 
 </div> 
 <div style="margin-left:0px;"> 
 12 
 </div> 
 <div style="margin-left:0px;"> 
 13 
 </div> 
 <div style="margin-left:0px;"> 
 14 
 </div> 
 <div style="margin-left:0px;"> 
 15 
 </div> 
 <div style="margin-left:0px;"> 
 16 
 </div> 
 <div style="margin-left:0px;"> 
 17 
 </div> 
 <div style="margin-left:0px;"> 
 18 
 </div> 
 <div style="margin-left:0px;"> 
 19 
 </div> 
 <div style="margin-left:0px;"> 
 20 
 </div> 
 <div style="margin-left:0px;"> 
 21 
 </div> 
 <div style="margin-left:0px;"> 
 22 
 </div> 
 <div style="margin-left:0px;"> 
 23 
 </div> 
 <div style="margin-left:0px;"> 
 24 
 </div> 
 <div style="margin-left:0px;"> 
 25 
 </div> 
 <div style="margin-left:0px;"> 
 26 
 </div> 
 <div style="margin-left:0px;"> 
 27 
 </div> 
 <div style="margin-left:0px;"> 
 28 
 </div> 
 <div style="margin-left:0px;"> 
 29 
 </div> 
 <div style="margin-left:0px;"> 
 30 
 </div> 
 <div style="margin-left:0px;"> 
 31 
 </div> 
 <div style="margin-left:0px;"> 
 32 
 </div> 
 <div style="margin-left:0px;"> 
 33 
 </div> 
 <div style="margin-left:0px;"> 
 34 
 </div> 
 <div style="margin-left:0px;"> 
 35 
 </div> 
 <div style="margin-left:0px;"> 
 36 
 </div> 
 </div> </td> 
 <td style="vertical-align:top;"> 
 <div style="margin-left:0px;"> 
 <div style="margin-left:0px;"> 
 package jtabledemo1; 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp; 
 </div> 
 <div style="margin-left:0px;"> 
 import javax.swing.*; 
 </div> 
 <div style="margin-left:0px;"> 
 import java.awt.*; 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp; 
 </div> 
 <div style="margin-left:0px;"> 
 public class Main { 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp; 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;public static void main(String[] args) { 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;final JFrame frame = new JFrame("JTable Demo"); 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp; 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;String[] columns = { "Code", "Name", "High", "Low", 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"Close", "Volume", "Change","Change %"}; 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp; 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Object[][] data = { 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{ "MBF", "CITYGROUP", 10.16, 10.16, 10.16, 200, 0.08,0.79}, 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{ "MBL", "BANK OF AMERICA", 12.66, 12.66, 12.66, 6600, 0.13,1.04}, 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{ "MJP", "Morgan Stanley Dean Witter &amp; Co.", 24.97, 24.97, 24.97, 1000, -0.04,-0.16} 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}; 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp; 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;JTable table = new JTable(data, columns); 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;JScrollPane scrollPane = new JScrollPane(table); 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;table.setFillsViewportHeight(true); 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp; 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;JLabel lblHeading = new JLabel("Stock Quotes"); 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;lblHeading.setFont(new Font("Arial",Font.TRUETYPE_FONT,24)); 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp; 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;frame.getContentPane().setLayout(new BorderLayout()); 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp; 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;frame.getContentPane().add(lblHeading,BorderLayout.PAGE_START); 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;frame.getContentPane().add(scrollPane,BorderLayout.CENTER); 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp; 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;frame.setSize(550, 200); 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;frame.setVisible(true); 
 </div> 
 <div style="margin-left:0px;"> 
 &nbsp;&nbsp;&nbsp;&nbsp;} 
 </div> 
 <div style="margin-left:0px;"> 
 } 
 </div> 
 </div> </td> 
 </tr> 
 </tbody> 
</table>

[JTable]: https://img-blog.csdnimg.cn/img_convert/61d5f0750be205cb46e62a8a595b7a18.gif
[JTable_JTable]: https://zentut.com//wp-content/uploads/2012/10/JTable.gif