使用springframework.Cache本地缓存

使用springframework.Cache本地缓存

		
		
			org.springframework.boot
			spring-boot-starter-cache
		
		
			com.github.ben-manes.caffeine
			caffeine
		

使用：加在方法上

@Cacheable(value = CommonStates.CACHE_NAME, key = “#入参”,unless="#result == null")

import com.github.benmanes.caffeine.cache.Caffeine;
import lf14dw.basedatasrv.common.CommonStates;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.caffeine.CaffeineCacheManager;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;

@Configuration
@EnableCaching
public class CacheConfig {

    @Bean
    public CacheManager cacheManager() {
        Caffeine caffeineObj = Caffeine.newBuilder().initialCapacity(100).maximumSize(1000).expireAfterWrite(24, TimeUnit.HOURS);

        CaffeineCacheManager cacherManager=new CaffeineCacheManager();
        cacherManager.setAllowNullValues(true);// 为防止缓存穿透（允许缓存中存放value为空的key,相应的过期时间设置短一些）
        cacherManager.setCaffeine(caffeineObj);
        cacherManager.setCacheNames(getCacheNames());
        return cacherManager;
    }
    private List getCacheNames(){
        List names=new ArrayList<>();
        names.add(CommonStates.CACHE_NAME);
        return names;
    }
}