使用’.txt’文件中的值填充’JTable’
我是java的新手，我有一个像这样的文本文件
0786160384|PK|Tharindu|912921549v|Colombo| 0711495765|PK|Gamini|657414589v|Colombo| 0114756199|HP|Weerasigha|657895478v|Kandy| 我想用这个文本文件中的数据填充我的’jTable’。 下面是我的代码到目前为止，它不起作用。 当我执行程序时，表格上没有显示任何内容。
private void formWindowOpened(java.awt.event.WindowEvent evt) { String line = null; DefaultTableModel dtm = (DefaultTableModel) PhoneBookTable.getModel(); try { BufferedReader br = new BufferedReader(new FileReader(file)); 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(); dtm.addRow(new Object[]{columns, data});//add here } catch (Exception e) { e.printStackTrace(); } }
有人可以帮帮我吗？
下面是我的整个代码
package Geo; import java.awt.Desktop; import java.io.BufferedReader; import java.io.IOException; import javax.swing.ImageIcon; import javax.swing.JFileChooser; import javax.swing.JOptionPane; import javax.swing.JTable; import javax.swing.table.TableModel; import java.text.*; import java.io.File; import java.io.FileWriter; import java.io.BufferedWriter; import java.io.FileInputStream; import java.io.FileReader; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.StringTokenizer; import java.util.Vector; import javax.swing.table.DefaultTableModel; public class PrintGUI extends javax.swing.JFrame { File file, tempFile; FileReader fileReader; FileWriter fileWriter; ArrayList ClientList; Vector data; Vector columns; public PrintGUI() { initComponents(); this.setIconImage(new ImageIcon(getClass().getResource("/Images/icon.png")).getImage()); file = new File("C:\\Users\\Tharindu\\Documents\\NetBeansProjects\\Geo phonebook\\phonebook.txt"); tempFile = new File("C:\\Users\\Tharindu\\Documents\\NetBeansProjects\\Geo phonebook\\tempphonebook.txt"); } public void toExcel(JTable PhoneBook, File file) { try { TableModel model = PhoneBook.getModel(); FileWriter excel = new FileWriter(file); for (int i = 0; i < model.getColumnCount(); i++) { excel.write(model.getColumnName(i) + "\t"); } excel.write("\n"); for (int i = 0; i < model.getRowCount(); i++) { for (int j = 0; j < model.getColumnCount(); j++) { excel.write(model.getValueAt(i, j).toString() + "\t"); } excel.write("\n"); } excel.close(); } catch (IOException e) { System.out.println(e); } } /** * This method is called from within the constructor to initialize the form. * WARNING: Do NOT modify this code. The content of this method is always * regenerated by the Form Editor. */ @SuppressWarnings("unchecked") // private void initComponents() { Export2ExcelButton = new javax.swing.JButton(); Export2Text = new javax.swing.JButton(); PrintButton = new javax.swing.JButton(); jScrollPane1 = new javax.swing.JScrollPane(); PhoneBookTable = new javax.swing.JTable(); Background = new javax.swing.JLabel(); setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE); setTitle("Print"); setResizable(false); addWindowListener(new java.awt.event.WindowAdapter() { public void windowOpened(java.awt.event.WindowEvent evt) { formWindowOpened(evt); } }); getContentPane().setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout()); Export2ExcelButton.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Images/Logos-Excel-icon.png"))); // NOI18N Export2ExcelButton.setText("Export to Excel"); Export2ExcelButton.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { Export2ExcelButtonActionPerformed(evt); } }); getContentPane().add(Export2ExcelButton, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 350, 130, 30)); Export2Text.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Images/File-TXT-icon.png"))); // NOI18N Export2Text.setText("Export to Text"); Export2Text.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { Export2TextActionPerformed(evt); } }); getContentPane().add(Export2Text, new org.netbeans.lib.awtextra.AbsoluteConstraints(160, 350, 130, 30)); PrintButton.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Images/Print-icon.png"))); // NOI18N PrintButton.setText("Print"); PrintButton.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { PrintButtonActionPerformed(evt); } }); getContentPane().add(PrintButton, new org.netbeans.lib.awtextra.AbsoluteConstraints(450, 350, 130, 30)); PhoneBookTable.setModel(new javax.swing.table.DefaultTableModel( new Object [][] { {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null}, {null, null, null, null, null} }, new String [] { "Phone No", "First Name", "Last Name", "NIC", "City" } ) { Class[] types = new Class [] { java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.Object.class }; public Class getColumnClass(int columnIndex) { return types [columnIndex]; } }); PhoneBookTable.setSelectionBackground(new java.awt.Color(255, 255, 0)); PhoneBookTable.setSelectionForeground(new java.awt.Color(51, 51, 51)); jScrollPane1.setViewportView(PhoneBookTable); getContentPane().add(jScrollPane1, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 20, 560, 310)); Background.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Images/background.jpg"))); // NOI18N getContentPane().add(Background, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 0, 600, 400)); pack(); setLocationRelativeTo(null); }// private void Export2ExcelButtonActionPerformed(java.awt.event.ActionEvent evt) { try { JFileChooser fc = new JFileChooser(); int option = fc.showSaveDialog(PrintGUI.this); if (option == JFileChooser.APPROVE_OPTION) { try { String filename = fc.getSelectedFile().getName(); String path = fc.getSelectedFile().getParentFile().getPath(); int len = filename.length(); String ext = ""; String file = ""; if (len > 4) { ext = filename.substring(len - 4, len); } if (ext.equals(".xls")) { file = path + "\\" + filename; } else { file = path + "\\" + filename + ".xls"; } toExcel(PhoneBookTable, new File(file)); int answer = JOptionPane.showConfirmDialog(null, "Would you like to open the exported file?", "Successfully exported!", option); if (answer == JOptionPane.YES_OPTION) { try { Desktop dt = Desktop.getDesktop(); dt.open(new File(file)); } catch (Exception e) { JOptionPane.showMessageDialog(null, e); } } } catch (Exception e) { JOptionPane.showMessageDialog(null, e); } } } catch (Exception e) { JOptionPane.showMessageDialog(null, e); } } private void PrintButtonActionPerformed(java.awt.event.ActionEvent evt) { MessageFormat header = new MessageFormat("Phone Book"); MessageFormat footer = new MessageFormat("Page{0,number,integer}"); try { PhoneBookTable.print(JTable.PrintMode.NORMAL, header, footer); } catch (java.awt.print.PrinterException e) { System.err.format("Cannot print %s$n", e.getMessage()); } } private void Export2TextActionPerformed(java.awt.event.ActionEvent evt) { try { JFileChooser fc = new JFileChooser(); int option = fc.showSaveDialog(PrintGUI.this); if (option == JFileChooser.APPROVE_OPTION) { try { String filename = fc.getSelectedFile().getName(); String path = fc.getSelectedFile().getParentFile().getPath(); int len = filename.length(); String ext = ""; String file = ""; if (len > 4) { ext = filename.substring(len - 4, len); } if (ext.equals(".txt")) { file = path + "\\" + filename; } else { file = path + "\\" + filename + ".txt"; } FileWriter fw = new FileWriter(file); BufferedWriter bw = new BufferedWriter(fw); bw.write("Phone No First Name Last Name NIC City"); bw.newLine(); bw.write("-----------------------------------------------------------"); bw.newLine(); for (int i = 0; i < PhoneBookTable.getRowCount(); i++) { for (int j = 0; j < PhoneBookTable.getColumnCount(); j++) { bw.write(PhoneBookTable.getModel().getValueAt(i, j) + " "); } bw.newLine(); } bw.close(); fw.close(); int answer = JOptionPane.showConfirmDialog(null, "Would you like to open the exported file?", "Successfully exported!", option); if (answer == JOptionPane.YES_OPTION) { try { Desktop dt = Desktop.getDesktop(); dt.open(new File(file)); } catch (Exception e) { JOptionPane.showMessageDialog(null, e); } } } catch (Exception e) { JOptionPane.showMessageDialog(null, e); } } } catch (Exception e) { JOptionPane.showMessageDialog(null, e); } } private void formWindowOpened(java.awt.event.WindowEvent evt) { String line = null; DefaultTableModel dtm = (DefaultTableModel) PhoneBookTable.getModel(); try { BufferedReader br = new BufferedReader(new FileReader(file)); 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(); dtm.addRow(new Object[]{columns, data});//add here } catch (Exception e) { e.printStackTrace(); } } /** * @param args the command line arguments */ public static void main(String args[]) { /* Set the Nimbus look and feel */ // /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html */ try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(PrintGUI.class .getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(PrintGUI.class .getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(PrintGUI.class .getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(PrintGUI.class .getName()).log(java.util.logging.Level.SEVERE, null, ex); } // // // // /* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new PrintGUI().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JLabel Background; private javax.swing.JButton Export2ExcelButton; private javax.swing.JButton Export2Text; private javax.swing.JTable PhoneBookTable; private javax.swing.JButton PrintButton; private javax.swing.JScrollPane jScrollPane1; // End of variables declaration }
你需要改变你的东西。你需要重置矢量data = new Vector(); 每当你读新行时，它包含第一行+第二行+依此类推。你也可以调用dtm.setRowCount(0); 避免空的初始行。 并且你只需要添加行，你的注释问题[单元格包含很多列]是因为dtm.addRow(new Object[]{columns, data})使用dtm.addRow(data); 相反，问题将得到解决
码
private void formWindowOpened(java.awt.event.WindowEvent evt) { String line = null; DefaultTableModel dtm = (DefaultTableModel) PhoneBookTable.getModel(); try { BufferedReader br = new BufferedReader(new FileReader(file)); while ((line = br.readLine()) != null) { data = new Vector();// this is important StringTokenizer st1 = new StringTokenizer(line, "|"); while (st1.hasMoreTokens()) { String nextToken = st1.nextToken(); data.add(nextToken); System.out.println(nextToken); } System.out.println(data); dtm.addRow(data);//add here System.out.println("................................."); } br.close(); } catch (Exception e) { e.printStackTrace(); } }
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