Redis数据结构之哈希

Posted 2020-10-31 曹军

　　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

 1 package top.it;
 2 
 3 import org.junit.Test;
 4 import redis.clients.jedis.Jedis;
 5 
 6 import java.util.Iterator;
 7 import java.util.Set;
 8 
 9 public class JedisDemo3 {
10     @Test
11     public void test(){
12         //设置ip与端口
13         Jedis jedis=new Jedis("192.168.140.121",6379);
14 
15         //获取所有的key值
16         Set keys=jedis.hkeys("myhash");
17         Iterator<String> it=keys.iterator() ;
18         while(it.hasNext()){
19             String key = it.next();
20             System.out.println("keys:"+key);
21         }
22         System.out.println("===============================");
23         //增
24         jedis.hset("myhash3","username","tom");
25         jedis.hset("myhash3","age","12");
26         jedis.hset("myhash3","sex","male");
27         jedis.hset("myhash3","address","Shanghai");
28         System.out.println(jedis.hkeys("myhash3"));
29         System.out.println("===============================");
30         //删
31         jedis.hdel("myhash3","address");
32         //改
33         jedis.hincrBy("myhash3","age",3);
34         //查
35         System.out.println(jedis.hget("myhash3","username"));
36         System.out.println(jedis.hmget("myhash3","username","sex"));
37         System.out.println(jedis.hexists("myhash3","sex"));
38         System.out.println(jedis.hkeys("myhash3"));
39         System.out.println(jedis.hvals("myhash3"));
40 
41 
42         jedis.close();
43     }
44 }

 

2.效果