java - ImageIO 异常

Question

我收到以下错误:

javax.imageio.IIOException: Can't read input file!
Resource not found: C:\icon.gif
at javax.imageio.ImageIO.read(ImageIO.java:1301)
at connector.SystemTrayCreator.createImage(SystemTrayCreator.java:98)
at connector.SystemTrayCreator.create(SystemTrayCreator.java:36)
at connector.Start.main(Start.java:14)
Exception in thread "main" java.lang.IllegalArgumentException: creating TrayIcon with     null Image
at java.awt.TrayIcon.<init>(TrayIcon.java:168)
at connector.SystemTrayCreator.create(SystemTrayCreator.java:36)
at connector.Start.main(Start.java:14)
Java Result: 1

出于以下代码:

final TrayIcon trayIcon = 
            new TrayIcon(createImage("C:\\icon.gif", "Tray icon"));

与

protected static Image createImage(String path, String description) {
    Image image = null;

    try {
        File f = new File(path);
        image = ImageIO.read(f);
    } catch (Exception e) {
        e.printStackTrace();
    }

    if (image == null) {
        Debugger.showMessage("Resource not found: " + path);
        return null;
    } else {
        return (new ImageIcon(image, description)).getImage();
    }
}

我很确定路径是正确的。此外，名称匹配。

谁知道哪里出了问题？

Answer 1

您的代码看起来不错。我目前想到的两件事在理论上可能是问题:

1. 文件权限问题。也许将文件放在驱动器根目录以外的其他位置并明确检查其权限。您可以直接从您的代码中调用 canRead() —— ImageIO.read 就是这样做的。它必须返回 true。

2. path 参数的末尾可能有一些空格。使用 trim() 消除这种可能性。