SpringBoot2整合Ehcache组件实现轻量级缓存管理

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-cache</artifactId>
</dependency>
<dependency>
    <groupId>net.sf.ehcache</groupId>
    <artifactId>ehcache</artifactId>
</dependency>

spring:
  cache:
    ehcache:
      config: classpath:ehcache.xml

@EnableCaching
@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class,args) ;
    }
}

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../config/ehcache.xsd">

    <!-- 操作系统缓存的临时目录,内存满后写入该目录 -->
    <diskStore path="java.io.tmpdir"/>

    <defaultCache
            maxElementsInMemory="1000"
            eternal="false"
            timeToIdleSeconds="120"
            timeToLiveSeconds="120"
            maxElementsOnDisk="10000000"
            diskExpiryThreadIntervalSeconds="120"
            memoryStoreEvictionPolicy="LRU">
        <persistence strategy="localTempSwap"/>
    </defaultCache>

    <cache name="userEntity"
           maxElementsInMemory="1000"
           eternal="false"
           timeToIdleSeconds="120"
           timeToLiveSeconds="120"
           maxElementsOnDisk="10000000"
           diskExpiryThreadIntervalSeconds="120"
           memoryStoreEvictionPolicy="LRU">
        <persistence strategy="localTempSwap"/>
    </cache>
</ehcache>

@Service
public class CacheService {

    private static final Logger LOGGER = LoggerFactory.getLogger(CacheService.class);

    @Resource
    private UserMapper userMapper ;

    @Cacheable(value="userEntity")  // 在缓存有效期内，首次查询才访问数据库
    public UserEntity getById (Integer id){
        // 通过日志，标识方法是否执行
        LOGGER.info("getById..."+id);
        return userMapper.selectById(id) ;
    }

    @CacheEvict(value="userEntity",key = "#id") //该ID数据更新，清空该ID缓存
    public void updateUser(Integer id) {
        UserEntity user = new UserEntity() ;
        user.setId(id);
        user.setUserName("myCache");
        userMapper.updateById(user);
    }
}