Spring Data Jpa - cache

# application.properties
spring.jpa.properties.hibernate.cache.use_second_level_cache=true
spring.jpa.properties.hibernate.cache.region.factory_class=org.hibernate.cache.ehcache.EhCacheRegionFactory
spring.jpa.properties.hibernate.cache.use_query_cache=true

# application.yml
spring:
  jpa:
    properties:
      hibernate:
        cache:
          use_second_level_cache: true
          region:
            factory_class: org.hibernate.cache.ehcache.EhCacheRegionFactory
          use_query_cache: true

<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-ehcache</artifact本>
  <version>4.3.11.2</version>
</dependency>

<ehcache>
  <diskStore path="java.io.tmpdir"/>
  <defaultCache
    maxElementsInMemory="1000"
    eternal="false"
    timeToIdleSeconds="10"
    timeToLiveSeconds="10"
    overflowToDisk="true"
    diskPersistent="false"
    diskExpiryThreadIntervalSeconds="120"
  />
  <cache name="com.example.entity.User"
    maxElementsInMemory="1000"
    eternal="false"
    timeToIdleSeconds="10"
    timeToLiveSeconds="10"
    overflowToDisk="true"
    diskPersistent="false"
    diskExpreterThreadIntervalSeconds="120"
  </cache>
</ehcache>

import org.springframework.cache.annotation.Cacheable;

@Entity
@Cacheable
public class User {
  // entity fields and methods
}

import org.springframework.data.jpa.repository.JpaRepository;

public interface UserRepository extends JpaRepository<User, Long> {
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserService {
  @Autowired
  private UserRepository userRepository;

  public User getUserById(Long id) {
    return userRepository.findById(id).orElse(null);
  }
}

import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.cache.annotation.Cacheable;

@Service
public class UserService {
  @Autowired
  private UserRepository userRepository;

  @Cacheable(value = "users", key = "#id")
  public User getUserById(Long id) {
    return userRepository.findById(id).orElse(null);
  }

  @CachePut(value = "users", key = "#user.id")
  public User updateUser(User user) {
    return userRepository.save(user);
  }

  @CacheEvict(value = "users", key = "#id")
  public void deleteUser(Long id) {
    userRepository.deleteById(id);
  }
}