我正在尝试将 JTable 的内容保存到文件中,然后在需要时打开文件以调出原始 JTable。我正在使用 DefaultTableModel 向 JTable 添加行和列,因此我决定将模型保存到文件中。这是我的方法:
public void outputfile(DefaultTableModel model) {
String filename = "data.file";
try {
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(filename));
oos.writeObject(model);
oos.close();
}
catch(IOException e) {
System.out.println("There was a problem creating file: " + e);
return;
}
System.out.println("JTable correctly saved to file " + filename);
}
所以现在我的模型已保存到 data.file,我有一个打开文件的方法。或者......这就是它应该做的:
public void inputfile() {
String filename = "data.file";
try {
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(filename));
model = (DefaultTableModel)ois.readObject();
}
catch(Exception e) {
System.out.println("Problem reading back table from file: " + filename);
return;
}
}
所以,在我的主要内容中,我只写:
outputfile(model); //to save model to file.
inputfile(); //to extract model from file and then apply it to the table.
table = new JTable(model);
所以,感谢您阅读,但它不起作用。当我使用输入文件时没有任何反应。请帮忙?
public void writefile2(JTable table) {
try{
FileWriter fstream = new FileWriter("out.txt");
BufferedWriter out = new BufferedWriter(fstream);
TableModel model = table.getTableModel();
for(int i = 0; i<model.getRowCount(); i++) {
for(int j = 0; j<model.getColumnCount(); j++) {
out.write((String)model.getValueAt(i, j));
}
}
out.close();
}catch (Exception e) {
System.err.println("Error: " + e.getMessage());
}
}