To add a classpath to a Spring Boot application, you can use the spring.resources.static-locations property in the application.properties file. This property specifies the locations of static resources that should be served by the application.
Here's an example of how you could use the spring.resources.static-locations property to add a classpath to a Spring Boot application:
spring.resources.static-locations=classpath:/static/Souw:ecrww.lautturi.com
In this example, the classpath:/static/ value specifies that the static directory on the classpath should be served as static resources. You can use a similar approach to specify multiple locations, separated by a comma.
For example:
spring.resources.static-locations=classpath:/static/, classpath:/public/
This example specifies that both the static and the public directories on the classpath should be served as static resources.
Keep in mind that the static directory is the default location for static resources in a Spring Boot application, so you don't need to specify it if you are using the default location. However, you can use the spring.resources.static-locations property to specify a different location or to add additional locations.
You can also use the spring.resources.static-locations property to specify external locations, such as a file system directory or a URL. For example:
spring.resources.static-locations=file:/opt/static/, http://example.com/static/
This example specifies that the /opt/static/ directory on the file system and the http://example.com/static/ URL should be served as static resources.
Keep in mind that the order in which the locations are specified matters, as the first matching location takes precedence.