Redis数据结构之哈希

　　这个部分依旧分为两个步骤，一个是redis客户端，一个是java的客户端

一：Redis客户端

1.get与set

　　

2.删除

　　

3.增加

　　

4.是否存在

　　hexists myhash2 age

　　

5.获取长度

　　

6.获取keys

　　

7.获取所有的values

　　 

二：Java客户端

1.java程序

package top.it;

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

import java.util.Iterator;
import java.util.Set;

public class JedisDemo3 {
    @Test
    public void test(){
        //设置ip与端口
        Jedis jedis=new Jedis("192.168.140.121",6379);

        //获取所有的key值
        Set keys=jedis.hkeys("myhash");
        Iterator<String> it=keys.iterator() ;
        while(it.hasNext()){
            String key = it.next();
            System.out.println("keys:"+key);
        }
        System.out.println("===============================");
        //增
        jedis.hset("myhash3","username","tom");
        jedis.hset("myhash3","age","12");
        jedis.hset("myhash3","sex","male");
        jedis.hset("myhash3","address","Shanghai");
        System.out.println(jedis.hkeys("myhash3"));
        System.out.println("===============================");
        //删
        jedis.hdel("myhash3","address");
        //改
        jedis.hincrBy("myhash3","age",3);
        //查
        System.out.println(jedis.hget("myhash3","username"));
        System.out.println(jedis.hmget("myhash3","username","sex"));
        System.out.println(jedis.hexists("myhash3","sex"));
        System.out.println(jedis.hkeys("myhash3"));
        System.out.println(jedis.hvals("myhash3"));


        jedis.close();
    }
}

2.效果