Question

java FileDialog类的问题

如何用FileDialog类的setFilenameFilter()方法,来设置保存和打开对话框的文件类型??比如说:我想弹出"保存"和"打开"对话框时,文件类型为*.txt,*.doc,*.html...最好有一个完整的例子给我看..记得用setFilenameFilter哦..

Answer 1

假设fg是你new出来的FileDialog的实例，可以参照下面的代码进行过滤：

fd.setFilenameFilter(new FilenameFilter() {
@Override
public boolean accept(File dir, String filename) {
//这里可以自己定义，dir满足什么要求，文件名满足什么要求
//下面是过滤文件名以“.ppt”结尾的文件。
return filename.endWith(".ppt");
}
});

Answer 2

public void widgetSelected(SelectionEvent event) {
FileDialog dialog = new FileDialog (shell, SWT.SAVE);
dialog.setFilterNames (new String [] {"Batch Files", "All Files (*.*)"});
dialog.setFilterExtensions (new String [] {"*.bat", "*.*"}); //Windows wild cards
dialog.setFilterPath ("c:\\"); //Windows path
dialog.setFileName ("fred.bat");
System.out.println ("Save to: " + dialog.open ()); //打开对话框}

Answer 3

JFileChooser chooser = new JFileChooser();
FileNameExtensionFilter filter = new FileNameExtensionFilter("JPG & GIF Images", "jpg", "gif");
chooser.setFileFilter(filter);