# 统计方法

/**
* 统计
*/
public static  void  updateStats(Jedis conn,Integer productId,Integer value){
String key="stats:"+productId;
ZParams minZParams=new ZParams();
minZParams.aggregate(ZParams.Aggregate.MIN);
ZParams maxZParams=new ZParams();
maxZParams.aggregate(ZParams.Aggregate.MAX);
//取并集 而不是交集和差集哦
conn.zunionstore(key,minZParams,"minTemp",key);
conn.zunionstore(key,maxZParams,"maxTemp",key);
conn.zincrby(key,value,"sum");
conn.zincrby(key,1,"count");
//删除临时的key
conn.del("minTemp");
conn.del("maxTemp");
}

# 打印统计

  public static void  printStats(Jedis conn,Integer productId){
String key="stats:"+productId;
Set<Tuple> tuples= conn.zrevrangeWithScores(key,0,-1);
double sum=0;
double avg=0;
for (Tuple tuple:
tuples) {
if(tuple.getElement().equals("sum")){
sum=tuple.getScore();
}else if(tuple.getElement().equals("count")){
avg=tuple.getScore();
}
System.out.println(tuple.getElement()+":"+tuple.getScore());
}
//计算平均值
System.out.println("avg:"+avg);
}

# 测试

 public static void main(String[] args)
throws Exception {
Jedis conn = new Jedis("127.0.0.1", 6379);
conn.flushDB();
for(int i=1;i<10;i++){
}
printStats(conn,1);
}

sum:45.0
max:9.0
count:9.0
min:1.0
avg:9.0

posted @ 2020-07-23 15:35  意犹未尽  阅读(46)  评论(0编辑  收藏