使用Redis作為快取物件,常用的儲存格式為字串,所以在儲存快取時,將物件轉為字串儲存.由於存的時候為字串,所以取出的也為json字串.
此工具類在設值時只需要將key與物件傳入即可
取值時只需要將key與要取的物件型別傳入即可

public class CacheUtilImpl implements CacheUtil {
	private Jedis jedis = JedisUtil.getJedis();
	
	@Override
	public   <T> Object getCache(String key, Class<T> cls) {
 

		Object obj = null;
		try {
			Gson gson = new Gson();
			String json = jedis.get(key);
			String s = json.substring(0, 1);
			if(s.equals("[")){
				List<T> list = new ArrayList<T>();
				JsonArray arry = new JsonParser().parse(json).getAsJsonArray();
				for (JsonElement jsonElement :
 
 arry) {
					list.add(gson.fromJson(jsonElement, cls));
				}
				obj=list;
			}else{
				obj = gson.fromJson(json, cls);
			}
			return obj;
		} catch (Exception e) {
			return null;
		}finally {
			JedisUtil.close(jedis);
		}
	}

	@Override
	public boolean setCache(String key,Object obj) {
		try {
 

			Gson gson = new Gson();
			String json = gson.toJson(obj);		
			String s = jedis.set(key, json);
			if(s.equals("OK")){
				return true;
			}
			return false;
		} catch (Exception e) {
			return false;
		}finally {
			JedisUtil.close(jedis);
		}	
	}
}

Redis連線池工具類

public class JedisUtil {
    //連線池
     private static JedisPool pool;
     //連線密碼
     private static String pwd = "123";
     static{
    	 JedisPoolConfig poolConf = new JedisPoolConfig();
    	 poolConf.setMaxTotal(10);
    	 poolConf.setMaxIdle(5);
    	 poolConf.setMaxWaitMillis(5000);
    	  pool = new JedisPool(poolConf, "localhost", 6379);
    	 
     }
     public  static Jedis getJedis(){
    	 Jedis jedis= pool.getResource();
    	 jedis.auth(pwd);
    	 return jedis;
     } 
     public static void close(Jedis jedis){
    	 jedis.close();
     }
}