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