如何将jtable保存到文本文件并将其读回jtable
[英]how to save jtable to text file and read it back to jtable
问题描述
我正在研究学生出勤率数据库，但不知道如何将从jtable创建的文本文件加载回同一jtable？ 我已经检查了api文档并在网上冲浪了潜在的提示，但无法正确读取表。
到目前为止，这是我的代码：
public class AttendanceArchive extends JFrame {
private JPanel contentPane;
private JTextField txtStudentName;
private JTable table;
private ScrollPane scrollPane;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
AttendanceArchive frame = new AttendanceArchive();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public AttendanceArchive() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 726, 516);
setLocationRelativeTo(null);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
File dir = new File("C:/GCK Database/Attendance/");
File[] Filename = dir.listFiles();
if (Filename.length == 0) {
txtStudentName = new JTextField();
txtStudentName.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
txtStudentName.setText("");
}
});
txtStudentName.setBackground(Color.WHITE);
txtStudentName.setText("STUDENT NAME");
txtStudentName.setBounds(25, 22, 262, 20);
contentPane.add(txtStudentName);
txtStudentName.setColumns(10);
JLabel lblViewBy = new JLabel("VIEW BY");
lblViewBy.setFont(new Font("Tahoma", Font.BOLD, 12));
lblViewBy.setBounds(25, 53, 57, 14);
contentPane.add(lblViewBy);
table = new JTable(){
@Override
public boolean isCellEditable(int row, int column) {
return false;
}
};
table.setCellSelectionEnabled(true);
table.getTableHeader().setReorderingAllowed(false);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
getContentPane().add(table);
final DefaultTableModel tableModel = new DefaultTableModel(new Object[]{"Student Name","Student ID"},0);
int q = table.getSelectedColumn();
int r = table.getSelectedRow();
table.setModel(tableModel);
table.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
String click1 = (String) table.getValueAt(table.getSelectedRow(),table.getColumnCount()-1) ;
int click2 = Integer.parseInt(click1);
int q = table.getSelectedColumn();
int r = table.getSelectedRow();
Object p = table.getValueAt(r,q);
String t = null;
String b = p.toString();
switch (b) {
case "1": t = "L";
break;
case "L": t = "0";
click2++;
break;
case "0": t = "1";
click2--;
break;
default: t = b;
break;
}
String click3 = Integer.toString(click2);
tableModel.setValueAt(click3,r,table.getColumnCount()-1);
tableModel.setValueAt(t,r,q);
}
});
String[] years = { "2008", "2009", "2010", "2011", "2012", "2013", "2014" };
final JComboBox comboBox_2 = new JComboBox(years);
comboBox_2.setEditable(true);
comboBox_2.setBounds(532, 22, 115, 20);
contentPane.add(comboBox_2);
String[] months = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
final JComboBox comboBox_1 = new JComboBox(months);
comboBox_1.setBounds(410, 22, 115, 20);
contentPane.add(comboBox_1);
table.setBounds(25, 143, 381, 296);
contentPane.add(table);
JButton btnGo = new JButton("Go");
btnGo.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
int x = 0;
if (comboBox_1.getSelectedItem() == "January"){
tableModel.setColumnCount(2);
x = 0;
}
if (comboBox_1.getSelectedItem() == "February"){
tableModel.setColumnCount(2);
x = 1;
}
if (comboBox_1.getSelectedItem() == "March"){
tableModel.setColumnCount(2);
x = 2;
}
if (comboBox_1.getSelectedItem() == "April"){
tableModel.setColumnCount(2);
x = 3;
}
if (comboBox_1.getSelectedItem() == "May"){
tableModel.setColumnCount(2);
x = 4;
}
if (comboBox_1.getSelectedItem() == "June"){
tableModel.setColumnCount(2);
x = 5;
}
if (comboBox_1.getSelectedItem() == "July"){
tableModel.setColumnCount(2);
x = 6;
}
if (comboBox_1.getSelectedItem() == "August"){
tableModel.setColumnCount(2);
x = 7;
}
if (comboBox_1.getSelectedItem() == "September"){
tableModel.setColumnCount(2);
x = 8;
}
if (comboBox_1.getSelectedItem() == "October"){
tableModel.setColumnCount(2);
x = 9;
}
if (comboBox_1.getSelectedItem() == "November"){
tableModel.setColumnCount(2);
x = 10;
}
if (comboBox_1.getSelectedItem() == "December"){
tableModel.setColumnCount(2);
x = 11;
}
Calendar calendar = Calendar.getInstance();
int year = Integer.parseInt((String) comboBox_2.getSelectedItem());
calendar.set(Calendar.YEAR, year);
calendar.set(Calendar.MONTH, x);
int numDays = calendar.getActualMaximum(Calendar.DATE);
for(int p=1;p<=numDays;p++){
tableModel.addColumn(p);
}
tableModel.addColumn("Absentees");
File dir = new File("C:/GCK Database/Attendance/");
dir.mkdir();
File dir2 = new File("C:/GCK Database/Student Profile/");
if (dir2.exists()){
File[] Filename = dir2.listFiles();
for( int p = tableModel.getRowCount() - 1; p >= 0; p-- ) {
tableModel.removeRow(p);
}
for (int i = 0; i < Filename.length; i++) {
ArrayList<Double> data = new ArrayList<Double>();
try {
BufferedReader br = new BufferedReader(new FileReader("C:/GCK Database/Student Profile/"+Filename[i].getName()+ "/" + Filename[i].getName()+ ".txt"));
List<String> lines = new ArrayList<String>();
String line = null;
while ((line = br.readLine()) != null) {
lines.add(line);
}
br.close();
lines.toArray(new String[lines.size()]);
if (numDays == 28) {
tableModel.addRow(new Object[]{Filename[i].getName(),lines.get(1),"1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","0"});
} else if (numDays == 29){
tableModel.addRow(new Object[]{Filename[i].getName(),lines.get(1),"1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","0"});
} else if (numDays == 30){
tableModel.addRow(new Object[]{Filename[i].getName(),lines.get(1),"1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","0"});
}else if (numDays == 31){
tableModel.addRow(new Object[]{Filename[i].getName(),lines.get(1),"1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","0"});
} else {
tableModel.addRow(new Object[]{Filename[i].getName(),lines.get(1),"1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","0"});
}
} catch (IOException e1) {
}
}
}
else {
}
}
});
btnGo.setHorizontalAlignment(SwingConstants.LEADING);
btnGo.setBounds(656, 21, 52, 23);
contentPane.add(btnGo);
String [] sort = {"Name", "ID"};
final JComboBox comboBox = new JComboBox(sort);
comboBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String arrange = (String)comboBox.getSelectedItem();
if (arrange == "Name") {
TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(table.getModel());
sorter.setComparator(0, new Comparator<Object>() {
@Override
public int compare(Object arg0, Object arg1) {
return arg0.toString().toLowerCase().compareTo(arg1.toString().toLowerCase());
}
});
sorter.toggleSortOrder(0);
table.setRowSorter(sorter);
table.setModel(tableModel);
}
if (arrange == "ID") {
TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(table.getModel());
sorter.setComparator(0, new Comparator<Object>() {
@Override
public int compare(Object arg0, Object arg1) {
return arg0.toString().compareTo(arg1.toString());
}
});
sorter.toggleSortOrder(1);
table.setRowSorter(sorter);
table.setModel(tableModel);
}
}
});
comboBox.setBounds(92, 53, 141, 20);
contentPane.add(comboBox);
JButton btnCancel = new JButton("Back");
btnCancel.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
homepage home = new homepage();
home.setVisible(true);
dispose();
}
});
btnCancel.setBounds(10, 450, 89, 23);
contentPane.add(btnCancel);
JButton btnSearch = new JButton("Search");
btnSearch.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
int x = 0;
if (comboBox_1.getSelectedItem() == "January"){
tableModel.setColumnCount(2);
x = 0;
}
if (comboBox_1.getSelectedItem() == "February"){
tableModel.setColumnCount(2);
x = 1;
}
if (comboBox_1.getSelectedItem() == "March"){
tableModel.setColumnCount(2);
x = 2;
}
if (comboBox_1.getSelectedItem() == "April"){
tableModel.setColumnCount(2);
x = 3;
}
if (comboBox_1.getSelectedItem() == "May"){
tableModel.setColumnCount(2);
x = 4;
}
if (comboBox_1.getSelectedItem() == "June"){
tableModel.setColumnCount(2);
x = 5;
}
if (comboBox_1.getSelectedItem() == "July"){
tableModel.setColumnCount(2);
x = 6;
}
if (comboBox_1.getSelectedItem() == "August"){
tableModel.setColumnCount(2);
x = 7;
}
if (comboBox_1.getSelectedItem() == "September"){
tableModel.setColumnCount(2);
x = 8;
}
if (comboBox_1.getSelectedItem() == "October"){
tableModel.setColumnCount(2);
x = 9;
}
if (comboBox_1.getSelectedItem() == "November"){
tableModel.setColumnCount(2);
x = 10;
}
if (comboBox_1.getSelectedItem() == "December"){
tableModel.setColumnCount(2);
x = 11;
}
Calendar calendar = Calendar.getInstance();
int year = Integer.parseInt((String) comboBox_2.getSelectedItem());
calendar.set(Calendar.YEAR, year);
calendar.set(Calendar.MONTH, x);
int numDays = calendar.getActualMaximum(Calendar.DATE);
for(int p=1;p<=numDays;p++){
tableModel.addColumn(p);
}
tableModel.addColumn("Absentees");
File dir = new File("C:\\GCK Database\\Student Profile");
FilenameFilter filter = new FilenameFilter() {
public boolean accept
(File dir, String name) {
return name.toLowerCase().contains(txtStudentName.getText().toLowerCase());
}
};
String[] children = dir.list(filter);
if (children == null) {
}
else {
for( int p = tableModel.getRowCount() - 1; p >= 0; p-- ) {
tableModel.removeRow(p);
}
for (int s=0; s < children.length; s++) {
String filename = children[s];
try {
BufferedReader br = new BufferedReader(new FileReader("C:/GCK Database/Student Profile/"+filename+ "/" + filename+ ".txt"));
List<String> lines = new ArrayList<String>();
String line = null;
while ((line = br.readLine()) != null) {
lines.add(line);
}
br.close();
lines.toArray(new String[lines.size()]);
if (numDays == 28) {
tableModel.addRow(new Object[]{filename,lines.get(1),"1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","0"});
} else if (numDays == 29){
tableModel.addRow(new Object[]{filename,lines.get(1),"1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","0"});
} else if (numDays == 30){
tableModel.addRow(new Object[]{filename,lines.get(1),"1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","0"});
}else if (numDays == 31){
tableModel.addRow(new Object[]{filename,lines.get(1),"1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","0"});
} else {
tableModel.addRow(new Object[]{filename,lines.get(1),"1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","1","0"});
}
} catch (IOException e) {
}
}
}
}
});
btnSearch.setBounds(307, 21, 89, 23);
contentPane.add(btnSearch);
JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setBounds(10, 84, 698, 355);
contentPane.add(scrollPane);
ColumnsAutoSizer.sizeColumnsToFit(table);
JButton btnPrint = new JButton("Print");
btnPrint.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
try {
if (! table.print()) {
}
} catch (java.awt.print.PrinterException e1) {
JOptionPane.showMessageDialog( null , "Could not find printer");
}
}
});
btnPrint.setBounds(504, 450, 89, 23);
contentPane.add(btnPrint);
JButton btnSave = new JButton("Save");
btnSave.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
StringBuffer sbTableData = new StringBuffer();
for(int row = 0; row < table.getRowCount(); row ++){
for(int column = 0; column < table.getColumnCount(); column ++){
sbTableData.append(table.getValueAt(row, column)).append(System.getProperty("line.separator"));
}
sbTableData.append(System.getProperty("line.separator"));
}
FileWriter fileWriter;
try {
String line;
int e = 0;
File dir = new File("C:/GCK Database");
dir.mkdir();
File dir1 = new File("C:/GCK Database/Attendance");
dir1.mkdir();
File dir2 = new File("C:/GCK Database/Attendance/" + comboBox_2.getSelectedItem());
dir2.mkdir();
File dir3 = new File("C:/GCK Database/Attendance/" + comboBox_2.getSelectedItem() + "/" + comboBox_1.getSelectedItem());
dir3.mkdir();
BufferedWriter bfw = new BufferedWriter(new FileWriter("C:/GCK Database/Attendance/" + comboBox_2.getSelectedItem() + "/" + comboBox_1.getSelectedItem() + "/Attendance " + comboBox_1.getSelectedItem() + " " + comboBox_2.getSelectedItem() + ".txt"));
for(int i = 0 ; i < table.getColumnCount() ; i++)
{
bfw.write(table.getColumnName(i));
bfw.write("\t");
}
for (int i = 0 ; i < table.getRowCount(); i++)
{
bfw.newLine();
for(int j = 0 ; j < table.getColumnCount();j++)
{
bfw.write((String)(table.getValueAt(i,j)));
bfw.write("\t");;
}
}
bfw.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
btnSave.setBounds(619, 450, 89, 23);
contentPane.add(btnSave);
JButton btnViewStudentProfile = new JButton("View Student Profile");
btnViewStudentProfile.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
if (table.getSelectedRow() != -1) {
int selectedRow = table.getSelectedRow();
String selectedRow1 = (String) table.getModel().getValueAt(selectedRow, 0);
SPInfo view = new SPInfo(selectedRow1);
view.addname(selectedRow1);
view.setVisible(true);
dispose();
}
else {
}
}
});
btnViewStudentProfile.setBounds(269, 450, 156, 23);
contentPane.add(btnViewStudentProfile);
JLabel lblKeys = new JLabel("Keys:");
lblKeys.setFont(new Font("Tahoma", Font.BOLD, 11));
lblKeys.setBounds(410, 54, 46, 14);
contentPane.add(lblKeys);
JLabel lblPresent = new JLabel("1 - Present L - Late 0 - Absent");
lblPresent.setBackground(Color.WHITE);
lblPresent.setBounds(449, 54, 259, 14);
contentPane.add(lblPresent);
} else {
I want to place the coding for same jtable as above but with the content from the text file here
}
}
public ScrollPane getScrollPane() {
return scrollPane;
}
}
这是更新的版本：
向前速度与上述相同
} else {
txtStudentName = new JTextField();
txtStudentName.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
txtStudentName.setText("");
}
});
txtStudentName.setBackground(Color.WHITE);
txtStudentName.setText("STUDENT NAME");
txtStudentName.setBounds(25, 22, 262, 20);
contentPane.add(txtStudentName);
txtStudentName.setColumns(10);
JLabel lblViewBy = new JLabel("VIEW BY");
lblViewBy.setFont(new Font("Tahoma", Font.BOLD, 12));
lblViewBy.setBounds(25, 53, 57, 14);
contentPane.add(lblViewBy);
table = new JTable(){
@Override
public boolean isCellEditable(int row, int column) {
return false;
}
};
table.setCellSelectionEnabled(true);
table.getTableHeader().setReorderingAllowed(false);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
getContentPane().add(table);
final DefaultTableModel tableModel = new DefaultTableModel(new Object[]{"Student Name","Student ID"},0);
int q = table.getSelectedColumn();
int r = table.getSelectedRow();
table.setModel(tableModel);
table.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
String click1 = (String) table.getValueAt(table.getSelectedRow(),table.getColumnCount()-1) ;
int click2 = Integer.parseInt(click1);
int q = table.getSelectedColumn();
int r = table.getSelectedRow();
Object p = table.getValueAt(r,q);
String t = null;
String b = p.toString();
switch (b) {
case "1": t = "L";
break;
case "L": t = "0";
click2++;
break;
case "0": t = "1";
click2--;
break;
default: t = b;
break;
}
String click3 = Integer.toString(click2);
tableModel.setValueAt(click3,r,table.getColumnCount()-1);
tableModel.setValueAt(t,r,q);
}
});
String[] years = { "2008", "2009", "2010", "2011", "2012", "2013", "2014" };
final JComboBox comboBox_2 = new JComboBox(years);
comboBox_2.setEditable(true);
comboBox_2.setBounds(532, 22, 115, 20);
contentPane.add(comboBox_2);
String[] months = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
final JComboBox comboBox_1 = new JComboBox(months);
comboBox_1.setBounds(410, 22, 115, 20);
contentPane.add(comboBox_1);
table.setBounds(25, 143, 381, 296);
contentPane.add(table);
JButton btnGo = new JButton("Go");
btnGo.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
我想将要读取的代码放入此处并插入到jtable中
}
});
btnGo.setHorizontalAlignment(SwingConstants.LEADING);
btnGo.setBounds(656, 21, 52, 23);
contentPane.add(btnGo);
String [] sort = {"Name", "ID"};
final JComboBox comboBox = new JComboBox(sort);
comboBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String arrange = (String)comboBox.getSelectedItem();
if (arrange == "Name") {
TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(table.getModel());
sorter.setComparator(0, new Comparator<Object>() {
@Override
public int compare(Object arg0, Object arg1) {
return arg0.toString().toLowerCase().compareTo(arg1.toString().toLowerCase());
}
});
sorter.toggleSortOrder(0);
table.setRowSorter(sorter);
table.setModel(tableModel);
}
if (arrange == "ID") {
TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(table.getModel());
sorter.setComparator(0, new Comparator<Object>() {
@Override
public int compare(Object arg0, Object arg1) {
return arg0.toString().compareTo(arg1.toString());
}
});
sorter.toggleSortOrder(1);
table.setRowSorter(sorter);
table.setModel(tableModel);
}
}
});
comboBox.setBounds(92, 53, 141, 20);
contentPane.add(comboBox);
JButton btnCancel = new JButton("Back");
btnCancel.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
homepage home = new homepage();
home.setVisible(true);
dispose();
}
});
btnCancel.setBounds(10, 450, 89, 23);
contentPane.add(btnCancel);
JButton btnSearch = new JButton("Search");
btnSearch.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
}
});
btnSearch.setBounds(307, 21, 89, 23);
contentPane.add(btnSearch);
JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setBounds(10, 84, 698, 355);
contentPane.add(scrollPane);
ColumnsAutoSizer.sizeColumnsToFit(table);
JButton btnPrint = new JButton("Print");
btnPrint.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
try {
if (! table.print()) {
}
} catch (java.awt.print.PrinterException e1) {
JOptionPane.showMessageDialog( null , "Could not find printer");
}
}
});
btnPrint.setBounds(504, 450, 89, 23);
contentPane.add(btnPrint);
JButton btnSave = new JButton("Save");
btnSave.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
StringBuffer sbTableData = new StringBuffer();
for(int row = 0; row < table.getRowCount(); row ++){
for(int column = 0; column < table.getColumnCount(); column ++){
sbTableData.append(table.getValueAt(row, column)).append(System.getProperty("line.separator"));
}
sbTableData.append(System.getProperty("line.separator"));
}
FileWriter fileWriter;
try {
String line;
int e = 0;
File dir = new File("C:/GCK Database");
dir.mkdir();
File dir1 = new File("C:/GCK Database/Attendance");
dir1.mkdir();
File dir2 = new File("C:/GCK Database/Attendance/" + comboBox_2.getSelectedItem());
dir2.mkdir();
File dir3 = new File("C:/GCK Database/Attendance/" + comboBox_2.getSelectedItem() + "/" + comboBox_1.getSelectedItem());
dir3.mkdir();
BufferedWriter bfw = new BufferedWriter(new FileWriter("C:/GCK Database/Attendance/" + comboBox_2.getSelectedItem() + "/" + comboBox_1.getSelectedItem() + "/Attendance " + comboBox_1.getSelectedItem() + " " + comboBox_2.getSelectedItem() + ".txt"));
for(int i = 0 ; i < table.getColumnCount() ; i++)
{
bfw.write(table.getColumnName(i));
bfw.write("\t");
}
for (int i = 0 ; i < table.getRowCount(); i++)
{
bfw.newLine();
for(int j = 0 ; j < table.getColumnCount();j++)
{
bfw.write((String)(table.getValueAt(i,j)));
bfw.write("\t");;
}
}
bfw.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
btnSave.setBounds(619, 450, 89, 23);
contentPane.add(btnSave);
JButton btnViewStudentProfile = new JButton("View Student Profile");
btnViewStudentProfile.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
if (table.getSelectedRow() != -1) {
int selectedRow = table.getSelectedRow();
String selectedRow1 = (String) table.getModel().getValueAt(selectedRow, 0);
SPInfo view = new SPInfo(selectedRow1);
view.addname(selectedRow1);
view.setVisible(true);
dispose();
}
else {
}
}
});
btnViewStudentProfile.setBounds(269, 450, 156, 23);
contentPane.add(btnViewStudentProfile);
JLabel lblKeys = new JLabel("Keys:");
lblKeys.setFont(new Font("Tahoma", Font.BOLD, 11));
lblKeys.setBounds(410, 54, 46, 14);
contentPane.add(lblKeys);
JLabel lblPresent = new JLabel("1 - Present L - Late 0 - Absent");
lblPresent.setBackground(Color.WHITE);
lblPresent.setBounds(449, 54, 259, 14);
contentPane.add(lblPresent);
}
}
public ScrollPane getScrollPane() {
return scrollPane;
}
}
1 个解决方案
解决方案1
3 已采纳 2014-05-07 11:19:05
假设您的文件数据为行/表格格式，只需逐行读取，并将每一行拆分为一个数组，然后将其添加到DefaultTableModel然后为表设置模型，例如
public void getDataFromFile(File file, JTable table) {
String[] colNames = { "Your", "Column", "Names", "Go", "Here" };
DefaultTableModel model = new DefaultTableModel(colNames, 0);
try (BufferedReader br = new BufferedReader(new FileReader(file)) {
String line;
while ((line = br.readLine()) != null) {
String[] data = line.split("\\s+");
model.addRow(data);
}
} catch (Exception ex) {
ex.printStackTrace();
}
table.setModel(model);
}
更新
“我的列名和大小未设置，但是可以从文本文件的第一行获得，所以我将如何根据文本文件设置这些列名和大小？”
不用担心设置大小。 只需构造一个默认模型，然后在获得第一行后使用setColumnIdentifiers() 。 然后添加行。
DefaultTableModel model = new DefaultTableModel();
try (BufferedReader br = new BufferedReader(new FileReader(file)) {
String line = br.readLine();
String[] colHeaders = line.split("\\s+");
model.setColumnIdentifiers(colHeaders);
while ((line = br.readLine()) != null) {
String[] data = line.split("\\s+");
model.addRow(data);
}
}
所有这些都假设您的数据是用空格分隔的
Java文档
public DefaultTableModel()-构造一个默认的DefaultTableModel，它是一个零列零行的表。public void setColumnIdentifiers(Object[] newIdentifiers)-替换模型中的列标识符。 如果newIdentifiers的数量大于当前的列数，则将新列添加到模型中每行的末尾。 如果newIdentifiers的数量小于当前的列数，则将删除行尾所有多余的列。
更新2
} else {
DefaultTableModel model = new DefaultTableModel();
try {
BufferedReader br = new BufferedReader(new FileReader(file));
String line = br.readLine();
String[] colHeaders = line.split("\\s+");
model.setColumnIdentifiers(colHeaders);
while ((line = br.readLine()) != null) {
String[] data = line.split("\\s+");
model.addRow(data);
}
} catch (Exception ex) {
ex.printStackTrace();
}
table.setModel(model);
}
JTable记录保存在文本文件中
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