redis> ZADD page_rank 10 google.com
(integer) 1

redis> ZRANGE salary 0 -1    # 显示所有成员
1) "peter"
2) "tom"
3) "jack"


redis> ZRANK salary tom    # 显示 tom 的薪水排名，第二
(integer) 1

public Double getScore( Long oneDayGoldBean) {
  String score = String.valueOf(oneDayGoldBean);
  return -Double.valueOf(score);
}

public Double getScore( Long oneDayGoldBean, Long useTime) {
  String value1 = String.valueOf(oneDayGoldBean/1.0);
  long todayEndSS = getTodayEndSS(useTime);
  String value2 = String.valueOf(todayEndSS);
  String score =value1+value2;
  return -Double.valueOf(score);
}

private long getTodayEndSS(long current){
  //今天零点零分零秒的毫秒数
  long zero = 0L;
  //今天23点59分59秒的毫秒数
  long twelve = zero + 24 * 60 * 60 * 1000;
  return (twelve - current) / 1000;
}

@Override
public boolean insertLeaderboard() {
  Double score = getScore(100l, 1000l);
  return redisTemplate.opsForZSet().add("leaderboard", "1", score);
}

@Override
public Set checkLeaderboard() {
  // 0 -1 表示返回所有的value的set值
  return redisTemplate.opsForZSet().range("leaderboard", 0, -1);
}