本地快取

本地快取儲存在記憶體當中，實現快取如下

首先需要引入包

<dependency><groupId>net.sf.ehcache</groupId><artifactId>ehcache</artifactId><version>2.10.1</version></dependency>

快取服務介面：

package com.mobcb.platform.service.common;

import 
 
net.sf.ehcache.Cache;

public interface EhcacheService {

    public void clearCache(String cacheName, String cacheKey);

    public void putCache(String cacheName, String cacheKey, Object value);

    public Object getCacheValue(String cacheName, String cacheKey);

    public Cache getCache(String cacheName);

    /**
 
     * 設定快取
*
     * @param cacheName         快取名稱
* @param cacheKey          快取key
     * @param value             值
* @param timeToLiveSeconds 存在時間，單位秒
*/
public void putCache(String cacheName, String cacheKey, Object value,
            int timeToLiveSeconds);

}

EhcacheService 介面實現：

package com.mobcb.platform.service.impl.common;

import 
 
com.mobcb.platform.service.common.EhcacheService;
import javax.annotation.Resource;
import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheManager;
import net.sf.ehcache.Element;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Service;

@Service("ehcacheService")
public class EhcacheServiceImpl implements EhcacheService {

    private static Log logger = LogFactory.getLog(EhcacheServiceImpl.class);

    @Resource(name = "ehCacheManager")
    private CacheManager cacheManger;

    private boolean createCacheIfNotFound = true;

    @Override
public void clearCache(String cacheName, String cacheKey) {
        Cache cache = getCache(cacheName);
        if (cache == null) {
            return;
        }
        cache.remove(cacheKey);

    }

    @Override
public void putCache(String cacheName, String cacheKey, Object value) {
        Cache cache = getCache(cacheName);
        if (cache == null) {
            return;
        }
        cache.put(new Element(cacheKey, value));

    }

    @Override
public Object getCacheValue(String cacheName, String cacheKey) {
        Cache cache = getCache(cacheName);
        if (cache == null) {
            return null;
        }
        Element element = cache.get(cacheKey);
        if (element == null || element.isExpired()) {
            return null;
        }
        return element.getObjectValue();
    }

    @Override
public Cache getCache(String cacheName) {
        Cache cache = cacheManger.getCache(cacheName);
        if (cache == null && createCacheIfNotFound) {
            cache = (Cache) cacheManger.addCacheIfAbsent(cacheName);
        }
        if (cache == null) {
            logger.error("EHCache: cache not config and not auto created, cacheName="
+ cacheName);
        }
        return cache;
    }

    @Override
public void putCache(String cacheName, String cacheKey, Object value, int timeToLiveSeconds) {
        Cache cache = getCache(cacheName);
        if (cache == null) {
            return;
        }
        cache.put(new Element(cacheKey, value, timeToLiveSeconds,
                timeToLiveSeconds));
    }
}

引入快取服務介面

/**
 * 快取服務
*/
@Resource(name = "ehcacheService")
private EhcacheService ehcacheService;

呼叫：

Object requestSource = ehcacheService.getCacheValue(
        "SHCAuth", "SHCAuthKey");
logger.info("------------------------快取獲取認證碼"+requestSource+"-----------------------");

第一個引數是快取名，第二個是快取名下的鍵值

 Redis快取

快取介面：

package com.mobcb.platform.service.common;

/**
 * 快取服務，提供快取操作方法
* <p> * </p> * Created by storm on 2016-05-26.
 */
public interface CacheService {

    /**
     * 清除快取
*
     * @param cacheName 快取名稱
* @param cacheKey  快取key
     */
void clearCache(String cacheName, String cacheKey);

    /**
     * 增加快取
*
     * @param cacheName 快取名稱
* @param cacheKey  快取key
     * @param value     值
*/
void putCache(String cacheName, String cacheKey, Object value);

    /**
     * 獲取快取值
*
     * @param cacheName 快取名稱
* @param cacheKey  快取key
     * @return
*/
Object getCacheValue(String cacheName, String cacheKey);

}

快取介面實現：

package com.mobcb.platform.service.impl.common;

import com.mobcb.platform.service.common.CacheService;
import javax.annotation.Resource;
import org.springframework.cache.Cache;
import org.springframework.cache.CacheManager;
import org.springframework.stereotype.Service;

/**
 * Created by storm on 2016-05-26.
 */
@Service("cacheService")
public class CacheServiceImpl implements CacheService {

    @Resource(name = "cacheManager")
    private CacheManager cacheManger;

    @Override
public void clearCache(String cacheName, String cacheKey) {
        // 清除快取
Cache cache = getCache(cacheName);
        if(cache == null) {
            return;
        }
        cache.evict(cacheName + "-" + cacheKey);
    }

    @Override
public void putCache(String cacheName, String cacheKey, Object value) {

        Cache cache = getCache(cacheName);
        if(cache == null) {
            return;
        }
        cache.put(cacheName + "-" + cacheKey, value);
    }

    @Override
public Object getCacheValue(String cacheName, String cacheKey) {

        Cache cache = getCache(cacheName);
        if(cache == null) {
            return null;
        }
        Cache.ValueWrapper element = cache.get(cacheName + "-" + cacheKey);
        if(element == null) {
            return null;
        }
        return element.get();
    }

    public Cache getCache(String cacheName) {

        Cache cache = cacheManger.getCache(cacheName);
        return cache;
    }
}

cacheManger配置如下：

@Bean
public CacheManager cacheManager(
        @SuppressWarnings("rawtypes") RedisTemplate redisTemplate) {

    RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate);
    // cacheManager.setDefaultExpiration(86400);
cacheManager.setDefaultExpiration(172800);
    return cacheManager;
}