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我想從表格格式的數據寫入到Excel工作表，在這個日期期間顯示爲「#######」在excel.But而我增加單元格大小的日期是所以我想從代碼本身增加Excel文件的寬度大小。任何人都可以幫助我嗎？代碼如下所示。爪哇鞦韆和Excel
btnExport.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e1) {
btnExport.setMnemonic(KeyEvent.VK_X);
btnExport.addActionListener(new AksyonListener());
}
public void toExcel(JTable table1, File file) {
try {
System.out.println("Success");
FileWriter excel = new FileWriter(file);
// DefaultTableModel model = new DefaultTableModel();
// table.setModel(model);
// model.insertRow(table.getRowCount(), new Object[]{0});
for (int i = 0; i < table.getColumnCount(); i++) {
excel.write(table.getColumnName(i) + "\t");
System.out.println(table.getColumnName(i));
}
/* int d,f;
System.out.println("d: "+table.getRowCount());
System.out.println("f: "+table.getColumnCount());*/
excel.write("\n");
for (int i = 1; i < table.getRowCount(); i++) {
for (int j = 0; j < table.getColumnCount(); j++) {
excel.write(table.getValueAt(i, j) + "\t");
System.out.println(table.getValueAt(i, j));
}
excel.write("\n");
}
excel.close();
} catch (IOException e) {
System.out.println(e);
}
}
class AksyonListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
if (e.getSource() == btnExport) {
JFileChooser fc = new JFileChooser();
int option = fc.showSaveDialog(TableSortFilter.this);
if (option == JFileChooser.APPROVE_OPTION) {
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(table, new File(file));
}
}
}
}
});