his sample demonstrates the caching auto-configuration support. Spring's caching abstraction is supported by many caching libraries, including:

• Any compliant JSR-107 (JCache) provider
• EhCache
• Hazelcast
• Infinispan
• Couchbase
• Redis
• Caffeine
• Simple provider based on ConcurrentHashMap
• Generic provider based on org.springframework.Cache bean definition(s)

this one is a sample for spring boot web with ehcaceh3 file persistence support and how to inject the cache manager plus how to do operations with the cache itself , for more information please check my blog :

https://mromeh.com/2017/12/22/spring-boot-with-ehcache-3-and-jsr-107/