1 package com.bwdz.sp.comm.util.test;

 2

 3 import com.google.common.cache.CacheBuilder;

 4 import org.springframework.cache.CacheManager;

 5 import org.springframework.cache.annotation.EnableCaching;

 6 import org.springframework.cache.guava.GuavaCache;

 7 import org.springframework.cache.support.SimpleCacheManager;

 8 import org.springframework.context.annotation.Bean;

 9 import org.springframework.context.annotation.Configuration;

10

11 import java.util.Arrays;

12 import java.util.concurrent.TimeUnit;

13

14 //@Configuration用于定义配置类，相当于把该类作为spring的xml配置文件，里面包含<beans>，作用为：初始化Spring容器(应用上下文)

15 //@EnableCaching注解驱动的缓存管理功能:不需要在XML文件中配置cache manager了，等价于<cache:annotation-driven/>.能够在服务类方法上标注@Cacheable

16 //@Bean标注在方法上(返回某个实例的方法)，等价于spring的xml配置文件中的<bean>，作用为：注册bean对象

17 @Configuration

18 @EnableCaching

19 public class CacheConfig {

20     @Bean

21     public CacheManager localCacheManager() {

22         SimpleCacheManager simpleCacheManager = new SimpleCacheManager();

23         //把各个cache注册到cacheManager中，GuavaCache实现了org.springframework.cache.Cache接口

24         simpleCacheManager.setCaches(Arrays.asList(

25                 //CacheBuilder构建多个cache

26                 new GuavaCache(

27                         "TIMEOUT_1_HOURS",//定义cache名称:@Cacheable的cacheNames(等价value)属性要和此对应

28                         CacheBuilder

29                                 .newBuilder()

30                                 .expireAfterWrite(1, TimeUnit.HOURS)//参数:过期时长、单位

31                                 .build()

32                 ),

33                 new GuavaCache(

34                         "TIMEOUT_5_MINUTE",

35                         CacheBuilder

36                                 .newBuilder()

37                                 .expireAfterWrite(5, TimeUnit.MINUTES)

38                                 .build()

39                 )

40         ));

41         return simpleCacheManager;

42     }

43 }

1     //key:缓存的 key，可以为空，如果指定要按照 SpEL 表达式编写(当然随便指定也不会报错)

2     @Cacheable(cacheNames = "TIMEOUT_1_HOURS", key = "'cache_getXfshxxss'")

3     public List<Map> getXfshxxss() throws Exception {

4         return (List<Map>) dao.findForList("XxkpsjtbMapper.getXfshxxss", null);

5     }