文件的打开和保存

来源：互联网发布：fix it下载编辑：程序博客网时间：2024/05/18 00:55

/**
*
* @author ALbert
* @category 文件的打开和保存
*
*/
public class FileSaveOpen extends JFrame{
JTextArea area=null;

public FileSaveOpen(){

  setBounds(300, 200, 600, 400);
  JMenuBar bar=new JMenuBar();
  JMenu jm=new JMenu();
  jm.setText("文件");

  JMenuItem j1=new JMenuItem();
  j1.setText("保存");
  JMenuItem j2=new JMenuItem();
  j2.setText("打开");

  jm.add(j1);
  jm.add(j2);

  bar.add(jm);

  area=new JTextArea();
  getContentPane().add(bar,BorderLayout.NORTH);
  getContentPane().add(area);
  //getContentPane().setLayout(null);

  j1.addActionListener(new ActionListener() {

   @Override
   public void actionPerformed(ActionEvent e) {
    fileSave();

   }
  });
  j2.addActionListener(new ActionListener() {

   @Override
   public void actionPerformed(ActionEvent e) {
    fileOpen();

   }
  });

  setVisible(true);
  setDefaultCloseOperation(EXIT_ON_CLOSE);
}

public void fileSave(){
  JFileChooser jfc=new JFileChooser();
  int result=jfc.showOpenDialog(null);
  if(result!=JFileChooser.CANCEL_OPTION){
   File f=jfc.getSelectedFile();
   System.out.println("您选择的文件是："+f.getAbsolutePath());
   FileWriter fw=null;
   try {
    f.createNewFile();
    fw=new FileWriter(f);
    fw.write(area.getText());

   } catch (IOException e) {
    e.printStackTrace();
   }finally {
    try {
     fw.flush();
     fw.close();
    } catch (Exception e) {
     e.printStackTrace();
    }
   }
  }else{
   System.out.println("您取消了选择的文件");
  }

}

public void fileOpen(){
  JFileChooser jfc=new JFileChooser();
  int result=jfc.showOpenDialog(null);
  if(result!=JFileChooser.CANCEL_OPTION){
   File f=jfc.getSelectedFile();
   System.out.println("您选择的文件是："+f.getAbsolutePath());
   FileReader fr=null;
   try {
    fr=new FileReader(f.getPath());
    int i=0;
    while((i=fr.read())!=-1){
     area.append(String.valueOf((char)i));
    }
   } catch (FileNotFoundException e) {
    e.printStackTrace();
   } catch (IOException e) {
    e.printStackTrace();
   }finally {
    try {
     fr.close();
    } catch (IOException e) {
     e.printStackTrace();
    }
   }

  }else{
   System.out.println("您取消了选择的文件");
  }

}

public static void main(String[] args) {
  new FileSaveOpen();
}

}

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