java - Spring Boot中的classpath和classpath*有什么区别？

Question

当我使用 Spring Boot Banner 配置文件时，我发现:

它有效:

spring.banner.location=classpath:banner.txt

不工作:

spring.banner.location=classpath*:banner.txt

那么 classpath: 和 classpath*: 之间有什么区别？

Answer 1

来自Spring文档

The wildcard classpath relies on the getResources() method of the underlying classloader. As most application servers nowadays supply their own classloader implementation, the behavior might differ especially when dealing with jar files. A simple test to check if classpath* works is to use the classloader to load a file from within a jar on the classpath: getClass().getClassLoader().getResources(""). Try this test with files that have the same name but are placed inside two different locations. In case an inappropriate result is returned, check the application server documentation for settings that might affect the classloader behavior.

所以classPath用于从当前类加载器加载资源(只是为了理解不会读取jar或其他项目依赖项下的资源)

classpath* 将执行 jar 或其他类加载器资源。