Topic: FileDialog如何实现存盘和打开文件的功能? |
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1.FileDialog如何实现存盘和打开文件的功能? | Copy to clipboard |
Posted by: OwenZhu Posted on: 2004-10-13 23:20 FileDialog 中怎样实验存盘的功能? 在打开文件时,我的在只能把文件的标题显示在TextArea内?请问高手阁下可否为鄙人指点?感激不尽! ================== import javax.swing.*; import java.awt.*; import java.awt.event.*; public class NotePad extends JFrame { private NotePad form; JMenuBar menubar=new JMenuBar(); JMenu file=new JMenu("File"); JMenuItem open=new JMenuItem("Open"); JMenuItem saveas=new JMenuItem("Save As"); JTextArea text=new JTextArea(); JScrollPane scollpane=new JScrollPane(text); public NotePad() { Container contentpane=this.getContentPane(); setJMenuBar(menubar); open.addActionListener(new fileActionListener()); saveas.addActionListener(new fileActionListener()); file.add(open); file.add(save); menubar.add(file); contentpane.add(scrollpane); this.setTitle("New file"); this.setSize(500,400); this.setVisible(true); form=this; } class fileActionListener implements ActionListener { public void actionPerformed(ActionEvent e) { if(e.getSource()==open) { //public static final int LOAD=1; FileDialog openDialog=new FileDialog(form,"Load",FileDialog.LOAD); openDialog.show(); if(openDialog.getFile() != null) text.setText(openDialog.getFile()); } if(e.getSource()==saveas) { FileDialog openDialog=new FileDialog(form,"Save As",FileDialog.SAVE); openDialog.setVisible(true); } } } public void static main(String[] args) { new NotePad(); } } |
2.Re:FileDialog如何实现存盘和打开文件的功能? [Re: OwenZhu] | Copy to clipboard |
Posted by: kavinwang Posted on: 2004-10-14 09:39 存盘和你的数据怎样存,需要你自己去实现。 一般是通过对话框选择需要保存得文件和目录,完成后调用自己得存盘代码进行存盘。 |
3.Re:FileDialog如何实现存盘和打开文件的功能? [Re: OwenZhu] | Copy to clipboard |
Posted by: ecsoftcn Posted on: 2004-12-15 17:03 那要看你的存取目标了,我用的文本文件,可以用PrintWriter实现 用System.out()写入 |
4.Re:FileDialog如何实现存盘和打开文件的功能? [Re: OwenZhu] | Copy to clipboard |
Posted by: quxiaofei Posted on: 2004-12-19 16:12 看可以不? private void doSave(String fileName){ FileOutputStream fos = null; if(fileName==""){ doSaveAs(); }else { String str = textBox.getText(); try{ fos = new FileOutputStream(fileName+".txt"); fos.write(str.getBytes()); }catch(IOException e){} finally{ try{ fos.close(); }catch(IOException e1){} } changed=false;} } private void doSaveAs(){ FileOutputStream fos = null; String str = textBox.getText(); FileDialog fileDialog = new FileDialog(this,"另存为...",FileDialog.SAVE); fileDialog.show(); if(fileDialog.getFile()==null){ return; } fileName = fileDialog.getDirectory()+File.separator+fileDialog.getFile(); try{ fos = new FileOutputStream(fileName+".txt"); fos.write(str.getBytes()); }catch(IOException e){} finally{ try{fos.close();} catch(IOException e1){} } changed = false; } |
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