java - 如何使用 JFileChooser.showSaveDialog 保存文件？

Question

我正在用 Java 制作一个文本编辑器，但我的保存功能无法按我想要的方式工作。这是我用来保存文件的代码:

public void actionPerformed(ActionEvent event) {
        String filename = JOptionPane.showInputDialog("Name this file");
        JFileChooser savefile = new JFileChooser();
        savefile.setSelectedFile(new File(filename));
        savefile.showSaveDialog(savefile);
        BufferedWriter writer;
        int sf = savefile.showSaveDialog(null);
        if(sf == JFileChooser.APPROVE_OPTION){
            try {
                writer = new BufferedWriter(new FileWriter(filename,
                        false));
                text.write(writer);
                writer.close();
                JOptionPane.showMessageDialog(null, "File has been saved","File Saved",JOptionPane.INFORMATION_MESSAGE);
                // true for rewrite, false for override

            } catch (IOException e) {
                e.printStackTrace();
            }
        }else if(sf == JFileChooser.CANCEL_OPTION){
            JOptionPane.showMessageDialog(null, "File save has been canceled");
        }
    }

当我单击“保存”按钮时，会弹出窗口，我选择要保存的位置。单击“保存”后，它会再次打开窗口并保存到我的 Eclipse Workspce。我用谷歌搜索了互联网，没有人遇到同样的问题。

Answer 1

因为你写道:

savefile.showSaveDialog(savefile); 

还有:

 int sf = savefile.showSaveDialog(null);

(两次)。您只需删除:

savefile.showSaveDialog(savefile);