redis 五种数据类型 基本操作

Posted 2021-11-05 weixin_43063239

package redis;


import org.junit.Test;
import redis.clients.jedis.Jedis;

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

public class JedisTest {

    private static Jedis jedis = new Jedis("127.0.0.1",6379);
    /**
     * String
     */
    @Test
    public void dome1(){
        //添加
        jedis.set("k1","v1");
        //取出
        System.out.println(jedis.get("k1"));

        //添加多个
        jedis.mset("k2","v2","k3","v3");
        //取出指定多个
        System.out.println(jedis.mget("k2","k3"));

        //取出所有key
        Set<String> keys = jedis.keys("*");
        collectionPrint(keys);

    }

    /**
     * list  方法名l开头
     */
    @Test
    public void dome2(){
        //添加
        jedis.lpush("ksList","v1","v2","v3");
        //取出
        List<String> ksList = jedis.lrange("ksList", 0, -1);
        collectionPrint(ksList);

    }

    /**
     * set 方法名s开头
     */
    @Test
    public void dome3(){
        //添加
        jedis.sadd("setKey","set1","set2");
        //取出
        Set<String> setKey = jedis.smembers("setKey");
        collectionPrint(setKey);
        //删除某个值
        jedis.srem("setKey","set1");
        Set<String> setKey1 = jedis.smembers("setKey");
        collectionPrint(setKey1);
    }

    /**
     * hash 方法名h开头
     */
    @Test
    public void dome4(){
        //添加
        jedis.hset("hashKey","k1","v1");
        jedis.hset("hashKey","k2","v2");
        //取出
        String k2 = jedis.hget("hashKey", "k2");
        System.out.println(k2);

        //添加多个
        HashMap<String, String> map = new HashMap<>();
        map.put("mapK1","mapV1");
        map.put("mapK2","mapV2");
        jedis.hmset("mapKey",map);
        //取出多个
        List<String> hmget = jedis.hmget("mapKey", "mapK1", "mapK2");
        System.out.println(hmget);
    }

    /**
     * zset
     */
    @Test
    public void dome5(){
        //添加
        jedis.zadd("china",100d,"shanghai");

        //取出
        Set<String> china = jedis.zrange("china", 0, -1);
        System.out.println(china);
    }

    /**
     * 集合打印
     * @param collection
     */
    public static void collectionPrint(Collection collection){
        collection.stream().forEach(str ->{
            System.out.println(str);
        });
    }
}