从特定的JAR文件中读取资源(文件的重复路径) [英] Read resources from specific JAR file (duplicate paths to file)

问题描述

比方说，您的jar1带有artifactId动物园，而jar2则带有artifactId动物.这两个jar都有一个具有相同路径的资源文件(例如:/animals/animal.txt).有什么方法可以从特定的jar中读取该文件?使用getResourcesAsStream还可以返回第一个jar，但有时我想要第二个jar的animal.txt文件.

Let's say you have jar1 with artifactId zoo, and jar2 with artifactId animals. Both jars have a resource file with the same path (ex: /animals/animal.txt). Is there any way to read that file from a specific jar? Using getResourcesAsStream also returns the first jar but sometimes I want the second jar's animal.txt file.

推荐答案

按照@MadProgrammer的建议，ClassLoader.getResources()将返回类似于jar:file:/C:/dir/animals.jar!/animals/animal.txt的URL.

As @MadProgrammer suggests, ClassLoader.getResources() will return URLs, which look like jar:file:/C:/dir/animals.jar!/animals/animal.txt.

因此，此类摘录应该能够选择正确的文件:

So this sort of excerpt should be able to choose the right file:

    Enumeration<URL> urls = getClass().getClassLoader().getResources("/animals/animal.txt");
    while (urls.hasMoreElements()) {
        URL url = urls.nextElement();
        if (url.toExternalForm().contains("animals.jar!")) {
            System.out.println(url);
            url.openStream()...
        }
    }

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