Spring Boot 访问静态资源缺少 scr/main/resources [英] Spring Boot access static resources missing scr/main/resources

问题描述

我正在开发一个 Spring Boot 应用程序.我需要在开始时解析一个 XML 文件 (countries.xml).问题是我不知道把它放在哪里以便我可以访问它.我的文件夹结构是

I am working on a Spring Boot application. I need to parse an XML file (countries.xml) on start. The problem is that I do not understand where to put it so that I could access it. My folders structure is

ProjectDirectory/src/main/java
ProjectDirectory/src/main/resources/countries.xml

我的第一个想法是将它放在 src/main/resources 中，但是当我尝试创建文件 (countries.xml) 时，我得到了一个 NPE 并且堆栈跟踪显示我的文件在 ProjectDirectory 中查看(因此 src/main/resources/未添加).我尝试创建文件 (resources/countries.xml)，路径看起来像 ProjectDirectory/resources/countries.xml(所以再次没有添加 src/main).

My first idea was to put it in src/main/resources, but when I try to create File (countries.xml) I get a NPE and the stacktrace shows that my file is looked in the ProjectDirectory (so src/main/resources/ is not added). I tried to create File (resources/countries.xml) and the path would look like ProjectDirectory/resources/countries.xml (so again src/main is not added).

我尝试添加它但没有结果

I tried adding this with no result

@Override
public void addResourceHandlers(final ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
    registry.setOrder(Ordered.HIGHEST_PRECEDENCE);
    super.addResourceHandlers(registry);
}

我知道我可以手动添加 src/main/，但我想了解为什么它不能正常工作.我还尝试了 ResourceLoader 的示例 - 没有结果.

I know that I can add src/main/ manually, but I want to understand why is it not working as it has to. I also tried examples with ResourceLoader - with the same no result.

有人能提出问题是什么吗?

Could anyone suggest what the problem is?

更新:仅供日后参考 - 构建项目后，我遇到了访问文件的问题，因此我将 File 更改为 InputStream

UPDATE: Just for future references - after building the project, I encountered problem with accessing file, so I changed File to InputStream

InputStream is = new ClassPathResource("countries.xml").getInputStream();

推荐答案

只需使用 Spring 类型 ClassPathResource.

Just use Spring type ClassPathResource.

File file = new ClassPathResource("countries.xml").getFile();

只要这个文件在类路径上，Spring 就会找到它.在开发和测试期间，这可以是 src/main/resources.在生产中，它可以是当前运行目录.

As long as this file is somewhere on classpath Spring will find it. This can be src/main/resources during development and testing. In production, it can be current running directory.

如果文件在胖 JAR 中，这种方法不起作用.在这种情况下，您需要使用:

This approach doesn't work if file is in fat JAR. In such case you need to use:

InputStream is = new ClassPathResource("countries.xml").getInputStream();

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