Java：如何从文件中获取缩略图 [英] Java: How to get the thumbnail from a file

问题描述

在Windows资源管理器（和linux gnome）中为每个文件显示缩略图或图标。与EXE，图像，视频，txt文件，ini文件，Word文档和其他许多文件类型一样。现在是我的问题：有没有办法按文件获得（最好是大）图标。

In windows explorer (and linux gnome) shows for each file a thumbnail or icon. Like with EXEs, images, videos, txt-files, ini-files, Word documents and so much other file types. Now is my question: Is there a way to get a (preferably large) icon by file.

类似于：

public static BufferedImage getThumbnail(File file) {...}

谢谢

推荐答案

看起来没有AWT方法可以做到这一点。

It looks like there is no AWT way of doing this.

如果您使用Swing，可以使用一种方法来获取Swing 图标 ...

If you're using Swing, there is a method you can use to get a Swing Icon...

import javax.swing.filechooser.FileSystemView;
import javax.swing.Icon;

...

Icon ico = FileSystemView.getFileSystemView().getSystemIcon(file);

您还可以将图标转换回一个图像（很可能是BufferedImage，但我还没有测试过）：

You can also convert that Icon back into an Image (most likely a BufferedImage, but I haven't tested it):

Image image = ((ImageIcon) ico).getImage();

还有一个类直接获取图标，但此类依赖于JDK。在Sun JDK上，它是 sun.awt.shell.ShellFolder 类。

There is also a class to get the icon directly, but this class is JDK dependent. On Sun JDK's it's the sun.awt.shell.ShellFolder class.

如果您正在使用SWT，那么事情有点棘手。

If you're using SWT, things are a bit trickier.

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