如何从运行时类路径读取目录？ [英] How to read a directory from the runtime classpath?

问题描述

我的Java应用程序需要能够找到 myconfig / 目录，该目录将捆绑在同一JAR中：

My Java application needs to be able to find a myconfig/ directory which will be bundled inside the same JAR:

myjar.jar/
    com/
        me/
            myproject/
                ConfigLoader.java --> looks for myconfig/ directory and its contents
    myconfig/
        conf-1.xml
        conf.properties
        ... etc.

实际上如何从运行时类路径中读取此 myconfig / 目录？我已经做过一些研究，看来从类路径读取文件的常规方法不适用于目录：

How do I actually go about reading this myconfig/ directory off the runtime classpath? I've done some research and it seems that the normal method of reading a file from the classpath doesn't work for directories:

InputStream stream = ConfigLoader.class.getResourceAsStream("myconfig");

所以没有人知道如何从运行时类路径读取整个目录（而不是单个文件） ）？

So does anyone know how to read an entire directory from the runtime classpath (as opposed to a single file)? Thanks in advance!

请注意：无法单独加载文件， myconfig 是一个包含以下内容的目录

Please note: It is not possible to load the files individually, myconfig is a directory with thousands of properties files inside it.

推荐答案

您可以使用 PathMatchingResourcePatternResolver

public class SpringResourceLoader {

    public static void main(String[] args) throws IOException {
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();

        // Ant-style path matching
        Resource[] resources = resolver.getResources("/myconfig/**");

        for (Resource resource : resources) {
            InputStream is = resource.getInputStream();
            ...
        }
    }
}

我对返回的资源没有任何幻想，但是您会看到图片。

I didn't do anything fancy with the returned Resource but you get the picture.

将此添加到您的maven依赖关系（如果使用maven）：

Add this to your maven dependency (if using maven):

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>3.1.2.RELEASE</version>
</dependency>

这篇关于如何从运行时类路径读取目录？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！