redis的数据类型-Hashes类型及java实现

Hashes介绍：

• hset
  （user:001是hash表的表名）

127.0.0.1:6379> hset user:001  name liudy(integer) 1127.0.0.1:6379> hget user:001 name

• hsetnx(键相同，返回0，不更新;与setnx类似)
• hmset（批量设置）

127.0.0.1:6379> hmset user:003 name liudy age 20 sex  1OK

• hget
• hmget

127.0.0.1:6379> hmget user:003 name age sex1) "liudy"2) "20"3) "1"

• hincrby

127.0.0.1:6379> hincrby user:003 age 5(integer) 25

• hexists
  (hash表里面的字段是否存在)

127.0.0.1:6379> hexists user:003 name(integer) 1127.0.0.1:6379> hexists user:003 age(integer) 1127.0.0.1:6379> hexists user:003 tal(integer) 0

• hlen
  （返回键的个数）

127.0.0.1:6379> hlen user:003(integer) 3127.0.0.1:6379> 

• hdel
  删除指定的field字段

127.0.0.1:6379> hlen user:003(integer) 3127.0.0.1:6379> hdel user:003 age(integer) 1127.0.0.1:6379> hlen user:003(integer) 2127.0.0.1:6379> 

• hkeys
  返回哈希表中的所有字段

127.0.0.1:6379> hkeys user:0031) "name"2) "sex"

• hvals
  返回哈希表中所有的values

127.0.0.1:6379> hkeys user:0031) "name"2) "sex"127.0.0.1:6379> hvals user:0031) "liudy"2) "1"

• hgetall(常用)
  获取全部的field及value

127.0.0.1:6379> hgetall user:0031) "name"2) "liudy"3) "sex"4) "1"

public class HashTest {    public static void main(String[] args) {        Jedis jedis = new Jedis("127.0.0.1", 6379);        jedis.auth("redis");        // hset        System.out.println("***hset***");        jedis.hset("user:001", "name", "liudy");        // hsetnx        System.out.println("***hsetnx***");        jedis.hsetnx("user:001","name","liudy11");        jedis.hsetnx("user:003","name","liudy3");        System.out.println(jedis.hget("user:001","name"));// liudy        System.out.println(jedis.hget("user:003","name"));        // hmset        System.out.println("***hmset***");        Map map = new HashMap<String, String>();        map.put("name", "liudy2");        map.put("age", "20");        map.put("sex","male");        jedis.hmset("user:002", map);        jedis.hmset("user:004", map);        // hget        System.out.println("***hget***");        System.out.println(jedis.hget("user:001","name"));        // hmget        System.out.println("***hmget***");        System.out.println(jedis.hmget("user:002","name","age","sex"));        // hincrby        System.out.println("***hincrby***");        jedis.hincrBy("user:002","age",5);        System.out.println(jedis.hget("user:002","age"));        // hexists        System.out.println("***hexists***");        System.out.println(jedis.hexists("user:002","age"));        // hlen        System.out.println("***hlen***");        System.out.println(jedis.hlen("user:002"));        // hdel        System.out.println("***hdel***");        jedis.hdel("user:002", "age", "sex", "name");        // hkeys        System.out.println("***hkeys***");        System.out.println(jedis.hkeys("user:004"));        // hvals        System.out.println("***hvals***");        System.out.println(jedis.hvals("user:004"));        // hgetall(常用)        System.out.println("***hgetall***");        System.out.println(jedis.hgetAll("user:004"));    }}