实现：读取文件夹指定类型的文件，并显示到表格控件中。
应用：对于项目开发中的文件分类起到了抛砖引玉的作用。
效果图：
实现代码：
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 | package com.lixiyu; import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.Insets; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.File; import java.sql.Date; import javax.swing.JButton; import javax.swing.JFileChooser; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.JTextField; import javax.swing.border.EmptyBorder; import javax.swing.event.CaretEvent; import javax.swing.event.CaretListener; import javax.swing.table.DefaultTableModel; public class ListCustomTypeFile extends JFrame { /** * */ private static final long serialVersionUID = -6263975104443132420L; /** * 自定义扩展名过滤器 * * @author DylanLee */ private final class CustomFilter implements java.io.FileFilter { @Override public boolean accept(File pathname) { // 获取用户设置的指定扩展名 String extName = extNameField.getText(); if (extName == null || extName.isEmpty()) return false ; if (!extName.startsWith( "." )) // 判断扩展名前缀 extName = "." + extName; // 完事扩展名前缀 extName = extName.toLowerCase(); // 判断扩展名与过滤文件名是否符合要求 if (pathname.getName().toLowerCase().endsWith(extName)) return true ; return false ; } } private JPanel contentPane; private JTextField extNameField; private JTable table; private File dir; private JLabel label; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater( new Runnable() { public void run() { try { ListCustomTypeFile frame = new ListCustomTypeFile(); frame.setVisible( true ); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the frame. */ public ListCustomTypeFile() { setTitle( "\u663E\u793A\u6307\u5B9A\u7C7B\u578B\u7684\u6587\u4EF6" ); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds( 100 , 100 , 450 , 300 ); contentPane = new JPanel(); contentPane.setBorder( new EmptyBorder( 5 , 5 , 5 , 5 )); contentPane.setLayout( new BorderLayout( 0 , 0 )); setContentPane(contentPane); JPanel panel = new JPanel(); contentPane.add(panel, BorderLayout.NORTH); GridBagLayout gbl_panel = new GridBagLayout(); gbl_panel.columnWidths = new int [] { 93 , 54 , 0 }; gbl_panel.rowHeights = new int [] { 23 , 0 , 0 }; gbl_panel.columnWeights = new double [] { 0.0 , 1.0 , Double.MIN_VALUE }; gbl_panel.rowWeights = new double [] { 0.0 , 0.0 , Double.MIN_VALUE }; panel.setLayout(gbl_panel); JButton button = new JButton( "\u9009\u62E9\u6587\u4EF6\u5939" ); button.addActionListener( new ActionListener() { public void actionPerformed(ActionEvent e) { do_button_actionPerformed(e); } }); GridBagConstraints gbc_button = new GridBagConstraints(); gbc_button.anchor = GridBagConstraints.NORTH; gbc_button.gridx = 0 ; gbc_button.gridy = 0 ; panel.add(button, gbc_button); label = new JLabel( "\u6587\u4EF6\u5939" ); GridBagConstraints gbc_label = new GridBagConstraints(); gbc_label.fill = GridBagConstraints.HORIZONTAL; gbc_label.gridx = 1 ; gbc_label.gridy = 0 ; panel.add(label, gbc_label); JLabel label_1 = new JLabel( "\u8F93\u5165\u6307\u5B9A\u6587\u4EF6\u6269\u5C55\u540D\u79F0\uFF1A" ); GridBagConstraints gbc_label_1 = new GridBagConstraints(); gbc_label_1.anchor = GridBagConstraints.EAST; gbc_label_1.insets = new Insets( 0 , 0 , 0 , 5 ); gbc_label_1.gridx = 0 ; gbc_label_1.gridy = 1 ; panel.add(label_1, gbc_label_1); extNameField = new JTextField(); extNameField.addCaretListener( new CaretListener() { public void caretUpdate(CaretEvent e) { do_extNameField_caretUpdate(e); } }); extNameField.setText( ".gif" ); GridBagConstraints gbc_extNameField = new GridBagConstraints(); gbc_extNameField.insets = new Insets( 0 , 0 , 5 , 0 ); gbc_extNameField.fill = GridBagConstraints.HORIZONTAL; gbc_extNameField.gridx = 1 ; gbc_extNameField.gridy = 1 ; panel.add(extNameField, gbc_extNameField); extNameField.setColumns( 10 ); JScrollPane scrollPane = new JScrollPane(); contentPane.add(scrollPane, BorderLayout.CENTER); table = new JTable(); table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); table.setModel( new DefaultTableModel( new Object[][] {}, new String[] { "\u6587\u4EF6\u540D\u79F0" , "\u6587\u4EF6\u5927\u5C0F" , "\u4FEE\u6539\u65E5\u671F" }) { /** * */ private static final long serialVersionUID = 5274214559103654856L; boolean [] columnEditables = new boolean [] { false , false , false }; public boolean isCellEditable( int row, int column) { return columnEditables[column]; } }); table.getColumnModel().getColumn( 0 ).setPreferredWidth( 220 ); table.getColumnModel().getColumn( 1 ).setPreferredWidth( 85 ); table.getColumnModel().getColumn( 2 ).setPreferredWidth( 110 ); scrollPane.setViewportView(table); } /** * 选择文件夹按钮的事件处理方法 * * @param e */ protected void do_button_actionPerformed(ActionEvent e) { JFileChooser chooser = new JFileChooser(); // 创建文件选择器 // 设置选择器的过滤器 chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY); chooser.showDialog( this , null ); dir = chooser.getSelectedFile(); getLabel().setText(dir.toString()); // 获取过滤后的符合条件的文件数组 listFiles(); } /** * 显示文件夹中的文件 */ private void listFiles() { if (dir == null ) return ; // 获取符合条件的文件数组 File[] files = dir.listFiles( new CustomFilter()); // 获取表格的数据模型 DefaultTableModel model = (DefaultTableModel) table.getModel(); model.setRowCount( 0 ); for (File file : files) { // 遍历文件数组 // 创建表格行数据 Object[] row = { file.getName(), file.length(), new Date(file.lastModified()) }; model.addRow(row); // 添加行数据到表格模型 } } protected void do_extNameField_caretUpdate(CaretEvent e) { listFiles(); } protected JLabel getLabel() { return label; } } |
本文转自lixiyu 51CTO博客，原文链接：http://blog.51cto.com/lixiyu/1308355，如需转载请自行联系原作者