JFileChooser檔案的選擇與儲存

 

轉自：http://hi.baidu.com/gglzf4/blog/item/a950a402ff7ae67b3812bba2.html#0

 

JFileChooser chooser = new JFileChooser();
      chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);//只能選擇檔案夾

JFileChooser fileChooser = new JFileChooser();
    fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);//只能選擇檔案

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, "儲存失敗");
        e2.printStackTrace();
       }     
      }

開啟對話方塊和儲存對話方塊的設計   swing java

1.點擊開啟按鈕後，開啟一個對話方塊
button.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
//產生一個檔案選取器
jChooser = new JFileChooser();
//設定預設的開啟目錄,如果不設的話按照window的預設目錄(我的文件)
jChooser.setCurrentDirectory(new File("e:/"));
//設定開啟檔案類型,此處設定成只能選擇檔案夾，不能選擇檔案
jChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);//只能開啟檔案夾
//開啟一個對話方塊
int index = jChooser.showDialog(null, "開啟檔案");
if (index == JFileChooser.APPROVE_OPTION) {
//把擷取到的檔案的絕對路徑顯示在文本編輯框中
jt.setText(jChooser.getSelectedFile().getAbsolutePath());
readPath = jt.getText() + "\\";
}
}
});
2.點擊儲存按鈕後，開啟一個儲存對話方塊
button2.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
jChooser2 = new JFileChooser();
jChooser2.setCurrentDirectory(new File("e:/"));//設定預設開啟路徑
jChooser2.setDialogType(JFileChooser.SAVE_DIALOG);//設定儲存對話方塊

//將設定好了的兩種檔案過濾器添加到檔案選取器中來
TxtFileFilter txtFileFilter = new TxtFileFilter();
XlsFileFilter xlsFileFilter = new XlsFileFilter();
jChooser2.addChoosableFileFilter(txtFileFilter);
jChooser2.addChoosableFileFilter(xlsFileFilter);

int index = jChooser2.showDialog(null, "儲存檔案");
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();
}
//程式執行完畢後，出現一個對話方塊來提示
int option = JOptionPane.showConfirmDialog(null, "賤人:結果已產生", "結果",
JOptionPane.YES_NO_OPTION);
System.exit(0);
}
}
});

//重寫檔案過濾器，設定開啟類型中幾種可選的檔案類型，這裡設了兩種，一種txt，一種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(文字檔)";
}

}

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(表格檔案)";
}

}