code: public byte[] set(byte[] key,byte[] value){
  		Jedis jedis = jedisPool.getResource();
  		try{
  			jedis.set(key,value);
  			if(this.expire != 0){
  				jedis.expire(key, this.expire);
  		 	}
  		}finally{
  			jedisPool.returnResource(jedis);
  		}
  		return value;
  	}
docs: set
  @param key
  @param value
  @return