一、@Caching

　　@Caching 定义了复杂的缓存规则：

@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
public @interface Caching {

    Cacheable[] cacheable() default {};

    CachePut[] put() default {};

    CacheEvict[] evict() default {};

}

 

 

　　示例：

    @Caching(
        cacheable = {
            @Cacheable(value={"emp"}, key = "#lastName")
        },
        put = {
            @CachePut(value = {"emp"}, key = "#result.id"),
            @CachePut(value = {"emp"}, key = "#result.email")
        }
    )
    public Employee getEmpByLastName(String lastName) {
        return employeeMapper.getEmpByLastName(lastName);
    }

 

　　@Caching 定义了复杂的缓存规则，如果使用@CachePut注解，方法一定会运行。

 

二、@CacheConfig

　　这个注解是加在类上，用于抽取缓存的公共配置。

　　@CacheConfig

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface CacheConfig {

    /**
     * Names of the default caches to consider for caching operations defined
     * in the annotated class.
     * <p>If none is set at the operation level, these are used instead of the default.
     * <p>May be used to determine the target cache (or caches), matching the
     * qualifier value or the bean names of a specific bean definition.
     */
    String[] cacheNames() default {};  //指定缓存的名字

    /**
     * The bean name of the default {@link org.springframework.cache.interceptor.KeyGenerator} to
     * use for the class.
     * <p>If none is set at the operation level, this one is used instead of the default.
     * <p>The key generator is mutually exclusive with the use of a custom key. When such key is
     * defined for the operation, the value of this key generator is ignored.
     */
    String keyGenerator() default "";   //指定 key 的生成策略

    /**
     * The bean name of the custom {@link org.springframework.cache.CacheManager} to use to
     * create a default {@link org.springframework.cache.interceptor.CacheResolver} if none
     * is set already.
     * <p>If no resolver and no cache manager are set at the operation level, and no cache
     * resolver is set via {@link #cacheResolver}, this one is used instead of the default.
     * @see org.springframework.cache.interceptor.SimpleCacheResolver
     */
    String cacheManager() default "";   //指定 cacheManager

    /**
     * The bean name of the custom {@link org.springframework.cache.interceptor.CacheResolver} to use.
     * <p>If no resolver and no cache manager are set at the operation level, this one is used
     * instead of the default.
     */
    String cacheResolver() default "";

}

 

 

　　示例：

@CacheConfig(cacheNames = {"emp"}) //抽取缓存的公共配置
@Service
public class EmployeeService {}