Spring - java.io.FileNotFoundException：无法打开类路径资源，因为它不存在
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Spring - java.io.FileNotFoundException: class path resource cannot be opened because it does not exist
提问by Punter Vicky
I am developing a Spring Boot application which has a dependency added. This dependency has a spring.xml file. I am scanning this xml file and creating beans as well. One of the beans is looking for hibernate.properties in classpath. I have added this property file under resources folder of my application. However I still see the exception listed below. Please can you let me know what I am missing?
我正在开发一个添加了依赖项的 Spring Boot 应用程序。这个依赖有一个 spring.xml 文件。我正在扫描这个 xml 文件并创建 bean。其中一个 bean 正在类路径中寻找 hibernate.properties。我已经在我的应用程序的资源文件夹下添加了这个属性文件。但是，我仍然看到下面列出的异常。请你能告诉我我错过了什么吗？
<util:properties id="HibernateProperties" location="classpath:hibernate.properties"/>
java.io.FileNotFoundException: class path resource [hibernate.properties] cannot be opened because it does not exist
java.io.FileNotFoundException: 类路径资源 [hibernate.properties] 无法打开，因为它不存在
采纳答案by kuhajeyan
Ant-style patterns with classpath: resources are not guaranteed to find matching resources if the root package to search is available in multiple class path locations. This is because a resource such as
com/mycompany/package1/service-context.xml may be in only one location, but when a path such as
classpath:com/mycompany/**/service-context.xml
带有类路径的 Ant 样式模式：如果要搜索的根包在多个类路径位置可用，则不能保证资源找到匹配的资源。这是因为像这样的资源
com/mycompany/package1/service-context.xml 可能只在一个位置，但是当路径如
类路径：com/mycompany/**/service-context.xml
so,
所以，
<util:properties id="HibernateProperties" location="classpath*:hibernate.properties"/>
may give you better chance.
可能会给你更好的机会。
but,
但，
Please note that classpath*: when combined with Ant-style patterns will only work reliably with at least one root directory before the pattern starts, unless the actual target files reside in the file system. This means that a pattern like classpath*:*.xml will not retrieve files from the root of jar files but rather only from the root of expanded directories. This originates from a limitation in the JDK's ClassLoader.getResources() method which only returns file system locations for a passed-in empty string (indicating potential roots to search).
请注意，classpath*: 当与 Ant 风格的模式结合使用时，在模式启动之前，它只能在至少一个根目录下可靠地工作，除非实际的目标文件驻留在文件系统中。这意味着像 classpath*:*.xml 这样的模式不会从 jar 文件的根目录检索文件，而只会从扩展目录的根目录检索文件。这源于 JDK 的 ClassLoader.getResources() 方法中的限制，该方法仅返回传入空字符串的文件系统位置（指示要搜索的潜在根）。
