java - 在 Java 中加载容器文件

Question

我在 Slick 中遇到问题，我想加载一个自定义容器文件（其中包含例如几百个图像）。但是我到底该怎么做呢？我将 Slick 用于我的游戏，它会有动画。Slick 的动画需要一个图像数组。现在想象一下，如果你想显示一个由 300 个图像组成的更复杂的动画，手动加载和创建图像对象是一个非常痛苦的过程。为了解决这个问题，我想到了这样一个容器类，它打开容器并返回图像（或其他任何东西！）。将图像保存回容器也很酷：P

那么有什么想法吗？

感谢您提供如何提前解决该问题的任何提示。

问候

Answer 1

If you have all your images in a directory or file directory, its pretty easy to traverse the directories and make a list or map of all the images via java's File class and some recursion. Something like...

Map <String, Image> nameToImage = new HashMap<>();
public void addDefaultImages(){
    this.addAndRecurseDirectoryOfImages(DEFAULT_IMAGE_DIRECTORY);
}

public void addAndRecurseDirectoryOfImages(String directory) {
    File folder = new File(directory);
    File[] listOfFiles = folder.listFiles();

    for (int i = 0; i < listOfFiles.length; i++) {
        if (listOfFiles[i].isFile()) {
            nameToImage.put(listOfFiles[i].getName(), new Image(directory + "/" + listOfFiles[i].getName());
        } else if (listOfFiles[i].isDirectory()) {
            addAndRecurseDirectoryOfImages(directory + "/" + listOfFiles[i].getName());
        }
    }
}

Then you can get images via the image name:

nameToImage.get(filename);

You can also add some logic to strip off the file extension.

BUT! There is a catch! If you package your application up one day, say, in a .jar file, Jar files have no concept of a file system! Meaning this won't work! In that case you'll want to generate a file that has a list of all your image locations because you won't be able to traverse directories.