网站每日UV数据指标去重统计

package com.iexecloud.cloud.casemanager;

import redis.clients.jedis.Jedis;

import java.text.SimpleDateFormat;
import java.util.Date;

public class UVDemo {

    private Jedis jedis=new Jedis("127.0.0.1");
    /**
     * 添加一次用户访问记录
     * @param userid
     */
    public void addaUserAccess(long userid){
        SimpleDateFormat date = new SimpleDateFormat("yyyy-MM-dd");
        String today = date.format(new Date());

        jedis.sadd("user_access_::"+today,String.valueOf(userid));
    }

    public Long getUV(){
        SimpleDateFormat date = new SimpleDateFormat("yyyy-MM-dd");
        String today = date.format(new Date());
            return jedis.scard("user_access_::"+today);
    }

    public static void main(String[] args) {
        UVDemo uvDemo = new UVDemo();
        for (int i = 0; i <100 ; i++) {
            long userid=i+1;
            for (int j = 0; j <10 ; j++) {
                uvDemo.addaUserAccess(userid);
            }
        }
        Long uv = uvDemo.getUV();
        System.out.println("当日的UV为："+uv);
    }

}