JFileChooser文件的选择与保存

转载 http://hi.baidu.com/gglzf4/blog/item/a950a402ff7ae67b3812bba2.html

 

 

JFileChooser chooser = new JFileChooser();
      chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);//只能选择文件夹

JFileChooser fileChooser = new JFileChooser();
    fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);//只能选择文件

int flag = fileChooser.showOpenDialog(this);
    if(flag ==JFileChooser.APPROVE_OPTION){
     File file = fileChooser.getSelectedFile();   
     attachHorizontalList.addNewAttaches(file);
     jScrollPane.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));
//     jScrollPane.setBorder(BorderFactory.createTitledBorder("共"+(++count)+"份附件"));
     jScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_NEVER);
     jScrollPane.setOpaque(false);
     jScrollPane.getViewport().setOpaque(false);
     this.add(jScrollPane);
     this.repaint();
    }

 

 

JFileChooser chooser = new JFileChooser();
      chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
      int flag = chooser.showSaveDialog(mainFrame);
      if (flag == JFileChooser.APPROVE_OPTION) {
       String path = chooser.getSelectedFile().getAbsolutePath()+attachmentName;
       try {
        FileInputStream ins = new FileInputStream(
          attachmentFile);
        FileOutputStream out = new FileOutputStream(path);
        byte b[] = new byte[512];
        while ((ins.read(b)) > 0) {
         out.write(b);
        }
        out.close();
        ins.close();
       } catch (IOException e2) {
        JOptionPane.showMessageDialog(null, "保存失败");
        e2.printStackTrace();
       }     
      }

 

打开对话框和保存对话框的设计   swing java

1.点击打开按钮后，打开一个对话框
button.addActionListener(new ActionListener() {
 
 @Override
 public void actionPerformed(ActionEvent arg0) {
 // TODO Auto-generated method stub
 //产生一个文件选择器
 jChooser = new JFileChooser();
 //设置默认的打开目录,如果不设的话按照window的默认目录(我的文档)
 jChooser.setCurrentDirectory(new File("e:/"));
 //设置打开文件类型,此处设置成只能选择文件夹，不能选择文件
 jChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);//只能打开文件夹
 //打开一个对话框
 int index = jChooser.showDialog(null, "打开文件");
 if (index == JFileChooser.APPROVE_OPTION) {
 //把获取到的文件的绝对路径显示在文本编辑框中
 jt.setText(jChooser.getSelectedFile().getAbsolutePath());
 readPath = jt.getText() + "//";
 }
 }
 });
2.点击保存按钮后，打开一个保存对话框
button2.addActionListener(new ActionListener() {
 
 @Override
 public void actionPerformed(ActionEvent arg0) {
 // TODO Auto-generated method stub
 jChooser2 = new JFileChooser();
 jChooser2.setCurrentDirectory(new File("e:/"));//设置默认打开路径
 jChooser2.setDialogType(JFileChooser.SAVE_DIALOG);//设置保存对话框

 //将设置好了的两种文件过滤器添加到文件选择器中来
 TxtFileFilter txtFileFilter = new TxtFileFilter();
 XlsFileFilter xlsFileFilter = new XlsFileFilter();
 jChooser2.addChoosableFileFilter(txtFileFilter);
 jChooser2.addChoosableFileFilter(xlsFileFilter);
 
 int index = jChooser2.showDialog(null, "保存文件");
 if (index == JFileChooser.APPROVE_OPTION) {
 
 File f = jChooser2.getSelectedFile();
 String fileName = jChooser2.getName(f) + ".xls";
 writePath = jChooser2.getCurrentDirectory().getAbsolutePath() + fileName;
 try {
 writeFile();
 } catch (IOException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 //程序执行完毕后，出现一个对话框来提示
 int option = JOptionPane.showConfirmDialog(null, "贱人:结果已产生", "结果",
 JOptionPane.YES_NO_OPTION);
 System.exit(0);
 }
 }
 });

//重写文件过滤器，设置打开类型中几种可选的文件类型，这里设了两种，一种txt，一种xls
class TxtFileFilter extends FileFilter {

@Override
public boolean accept(File f) {
 // TODO Auto-generated method stub
 String nameString = f.getName();
 return nameString.toLowerCase().endsWith(".txt");
}

@Override
public String getDescription() {
 // TODO Auto-generated method stub
 return "*.txt(文本文件)";
}

}

class XlsFileFilter extends FileFilter {

@Override
public boolean accept(File f) {
 // TODO Auto-generated method stub
 String nameString = f.getName();
 return nameString.toLowerCase().endsWith(".xls");
}

@Override
public String getDescription() {
 // TODO Auto-generated method stub
 return "*.xls(表格文件)";
}

}