hash哈希操作

package com.study.util;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import redis.clients.jedis.Jedis;

public class RedisHash {

    public static void main(String[] args) {
        Jedis jedis = RedisUtil.getJedis();
        //将user的id赋值为1
        jedis.hset("user", "id", "1");
        //获取user的id值
        String id = jedis.hget("user", "id");
        System.out.println("id:" + id);
        
        //设置user的name为zs,age为18
        Map<String,String> hash = new HashMap<>();
        hash.put("name", "zs");
        hash.put("age", "18");
        jedis.hmset("user", hash);
        //获取user的id,name,age值
        List<String> hList = jedis.hmget("user", "id","name","age");
        System.out.print("user的id,name,age值为：");
        for (String value : hList) {
            System.out.print(value);
        }
        System.out.println();
        
        //查看user是否有id字段
        boolean hexists = jedis.hexists("user", "id");
        System.out.println("user是否有id字段:" + hexists);
        
        //删除user中的age字段
        jedis.hdel("user", "age");
        System.out.print("删除user中的age字段后user的字段：");
        //获取user的所有字段
        Set<String> keys = jedis.hkeys("user");
        for (String key : keys) {
            System.out.print(key);
        }
        System.out.println();
        //将user的name值改为zhangsan
        jedis.hset("user", "name", "zhangsan");
        //获取user字段的数量
        long length = jedis.hlen("user");
        System.out.println("user字段的数量：" + length);
        
        //获取user字段的所有值
        List<String> values = jedis.hvals("user");
        System.out.print("user字段所有值：");
        for (String value : values) {
            System.out.print(value);
        }
        System.out.println();
        
        //获取user的所有字段及对应的值
        Map<String,String> map = jedis.hgetAll("user");
        for (String key : map.keySet()) {
            System.out.println(key + "->" + map.get(key));
        }
        
        jedis.close();
    }
}