导入具有现有数据的数据JTable之后的文本文件我尝试将JTable数据导出到文本文件并将数据导入回同一JTable。但是，如图所示，文本文件和JTable中的数据顺序不正确。表中的某些单元格用两个或多个单词填充。帮我解决这个问题是高度赞赏的吗？提前致谢。
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;
public class SaveTest1 extends javax.swing.JFrame{
public SaveTest1() {
initComponents();
setLocationRelativeTo(null);
}
@SuppressWarnings("unchecked")
private void initComponents() {
java.awt.GridBagConstraints gridBagConstraints;
jFileChooser1 = new javax.swing.JFileChooser();
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
getContentPane().setLayout(new java.awt.GridBagLayout());
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{"1", "Engineering Brick", "Nos", "18.00", "550", "9900.00"},
{"2", "River Sand", "Cube", "15000.00", "0.1", "1500.00"},
{"3", "Cement", "cwt", "1100.00", "3", "3300.00"},
{null, null, null, null, "Cost of Material", "14700.00"}
},
new String [] {
"ID", "Name", "Unit", "Price", "Qty", "Amount"
}
) {
Class[] types = new Class [] {
java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class
};
public Class getColumnClass(int columnIndex) {
return types [columnIndex];
}
});
jScrollPane1.setViewportView(jTable1);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 0;
gridBagConstraints.gridwidth = 2;
gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
gridBagConstraints.weightx = 0.1;
gridBagConstraints.weighty = 0.1;
gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
getContentPane().add(jScrollPane1, gridBagConstraints);
jButton1.setText("Export");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 1;
gridBagConstraints.weightx = 0.1;
gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
getContentPane().add(jButton1, gridBagConstraints);
jButton2.setText("Import");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 1;
gridBagConstraints.gridy = 1;
gridBagConstraints.weightx = 0.1;
gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
getContentPane().add(jButton2, gridBagConstraints);
pack();
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
JFileChooser fileChooser = new JFileChooser();
fileChooser.setDialogTitle("Save as");
int userSelection = fileChooser.showSaveDialog(this);
if (userSelection == JFileChooser.APPROVE_OPTION) {
File fileToSave = fileChooser.getSelectedFile();
try {
FileWriter fw = new FileWriter(fileToSave);
BufferedWriter bw = new BufferedWriter(fw);
for (int i = 0; i < jTable1.getColumnCount(); i++) {
bw.write(jTable1.getColumnName(i));
bw.write("\t");
}
for (int i = 0; i < jTable1.getRowCount(); i++) {
bw.newLine();
for (int j = 0; j < jTable1.getColumnCount(); j++) {
bw.write((String) jTable1.getValueAt(i,j));
String val = (String) jTable1.getValueAt(i, j);
if (val == null) {
val = "";
}
bw.write("\t");
}
}
JOptionPane.showMessageDialog(this, "File Saved", "Information", JOptionPane.INFORMATION_MESSAGE);
bw.close();
fw.close();
} catch (IOException ex) {
JOptionPane.showMessageDialog(this, "Error", "Error Message", JOptionPane.ERROR_MESSAGE);
}
}
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
JFileChooser fileChooser = new JFileChooser();
fileChooser.setDialogTitle("Open");
int userSelection = fileChooser.showOpenDialog(this);
if (userSelection == JFileChooser.APPROVE_OPTION) {
File fileToOpen = fileChooser.getSelectedFile();
try {
FileReader fr = new FileReader(fileToOpen);
BufferedReader br = new BufferedReader(fr);
DefaultTableModel model1 = (DefaultTableModel) jTable1.getModel();
Object[] lines = br.lines().toArray();
for (int i = 1; i < lines.length; i++) {
String[] row = lines[i].toString().split(" ");
model1.addRow(row);
}
} catch (Exception ex) {
Logger.getLogger(SaveTest1.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
DefaultTableModel model1 = (DefaultTableModel) jTable1.getModel();
model1.setRowCount(0);
}
public static void main(String args[]) {
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(SaveText.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(SaveText.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(SaveText.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(SaveText.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new SaveText().setVisible(true);
}
});
}
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JFileChooser jFileChooser1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
}
写入文件时，用制表符char分隔单元格bw.write("\t");，但是当读回数据时，则使用空格String[] row = lines[i].toString().split(" ");来标识每个单元格的边框。不要这样 在写入和回读时，请使用相同的char或String分隔单元格。
考虑
String[] row = lines[i].split("\t", -1);
代替
另外，最好将Stream转换为特定于String的数组，而不是Object数组：
String[] lines = br.lines().toArray(String[]::new);
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