一、對Hash類型的操做命令java
1.一、hset:設置值。格式是:hset hash的key 項的key 項的值redis
操做以下:ui
java示例代碼:編碼
1 import redis.clients.jedis.Jedis; 2 3 /** 4 * redis中對於hash類型的: hset 操做示例 5 * hset:設置值。格式是:hset hash的key 項的key 項的值 6 */ 7 public class Hash_hset_operation { 8 public static void main(String[] args) { 9 Jedis jedis = new Jedis("127.0.0.1",6379); 10 /** 11 * 示例1: hset hash的key 項的key 項的值 12 */ 13 jedis.hset("myhash","id","3"); 14 jedis.hset("myhash","name","xiaohong"); 15 jedis.hset("myhash","age","13"); 16 } 17 }
1.二、hmset:同時設置多對值。格式是:hmset hash的key 項的key 項的值。(項的key和項的值能夠多對)spa
操做以下:3d
java示例代碼:code
1 import redis.clients.jedis.Jedis; 2 3 import java.util.HashMap; 4 import java.util.Map; 5 6 /** 7 * redis中對於hash類型的: hmset 操做示例 8 * hmset:同時設置多對值。格式是:hmset hash的key 項的key 項的值。(項的key和項的值能夠多對) 9 */ 10 public class Hash_hmset_operation { 11 public static void main(String[] args) { 12 Jedis jedis = new Jedis("127.0.0.1",6379); 13 /** 14 * 示例1: hmset hash的key 項的key 項的值。(項的key和項的值能夠多對) 15 */ 16 Map<String,String> map = new HashMap<>(); 17 map.put("id","1"); 18 map.put("name","dongdong"); 19 map.put("age","3"); 20 jedis.hmset("myhash",map); 21 } 22 }
1.三、hget:獲取值。格式是:hget hash的key 項的keyorm
操做以下:blog
java示例代碼:ci
1 import redis.clients.jedis.Jedis; 2 3 /** 4 * redis中對於hash類型的: hget 操做示例 5 * hget:獲取值。格式是:hget hash的key 項的key 6 */ 7 public class Hash_hget_operation { 8 public static void main(String[] args) { 9 Jedis jedis = new Jedis("127.0.0.1",6379); 10 /** 11 * 示例1: hget hash的key 項的key 12 */ 13 String id = jedis.hget("myhash", "id"); 14 String name = jedis.hget("myhash", "name"); 15 String age = jedis.hget("myhash", "age"); 16 17 System.out.println(String.format("id = %s, name = %s, age = %s",id,name,age)); 18 } 19 }
1.四、hmget:同時獲取多對值。格式是:hmget hash的key 項的key。(項的key能夠有多個)
操做以下:
java示例代碼:
1 import redis.clients.jedis.Jedis; 2 3 import java.util.List; 4 5 /** 6 * redis中對於hash類型的: hmget 操做示例 7 * hmget:同時獲取多對值。格式是:hmget hash的key 項的key。(項的key能夠有多個) 8 */ 9 public class Hash_hmget_operation { 10 public static void main(String[] args) { 11 Jedis jedis = new Jedis("127.0.0.1",6379); 12 /** 13 * 示例1: hmget hash的key 項的key。(項的key能夠有多個) 14 */ 15 List<String> hmget = jedis.hmget("myhash", "id", "name", "age"); 16 System.out.println("hmget = " + hmget); 17 } 18 }
1.五、hgetall:獲取該key下全部的值。格式是:hgetall hash的key
操做以下:
java示例代碼:
1 import redis.clients.jedis.Jedis; 2 3 import java.util.Map; 4 5 /** 6 * redis中對於hash類型的: hgetall 操做示例 7 * hgetall:獲取該key下全部的值。格式是:hgetall hash的key 8 */ 9 public class Hash_hgetall_operation { 10 public static void main(String[] args) { 11 Jedis jedis = new Jedis("127.0.0.1",6379); 12 /** 13 * 示例1: hgetall hash的key 14 */ 15 Map<String, String> myhash = jedis.hgetAll("myhash"); 16 System.out.println("myhash = " + myhash); 17 } 18 }
1.六、hdel:刪除某個項。格式是:hdel hash的key 項的key
操做以下:
java示例代碼:
1 import redis.clients.jedis.Jedis; 2 3 import java.util.Map; 4 5 /** 6 * redis中對於hash類型的: hdel 操做示例 7 * hdel:刪除某個項。格式是:hdel hash的key 項的key 8 */ 9 public class Hash_hdel_operation { 10 public static void main(String[] args) { 11 Jedis jedis = new Jedis("127.0.0.1",6379); 12 13 Map<String, String> myhash = jedis.hgetAll("myhash"); 14 System.out.println("myhash = " + myhash); 15 /** 16 * 示例1: hdel hash的key 項的key 17 */ 18 Long hdel = jedis.hdel("myhash", "age"); 19 System.out.println("hdel = " + hdel); 20 21 Map<String, String> myhash1 = jedis.hgetAll("myhash"); 22 System.out.println("myhash1 = " + myhash1); 23 } 24 }
1.七、hlen:獲取key裏面的鍵值對數量。格式是:hlen hash的key
操做以下:
java示例代碼:
1 import redis.clients.jedis.Jedis; 2 3 import java.util.Map; 4 5 /** 6 * redis中對於hash類型的: hlen 操做示例 7 * hlen:獲取key裏面的鍵值對數量。格式是:hlen hash的key 8 */ 9 public class Hash_hlen_operation { 10 11 public static void main(String[] args) { 12 Jedis jedis = new Jedis("127.0.0.1",6379); 13 14 Map<String, String> myhash = jedis.hgetAll("myhash"); 15 System.out.println("myhash = " + myhash); 16 /** 17 * 示例1: hlen hash的key 18 */ 19 Long hlen = jedis.hlen("myhash"); 20 System.out.println("hlen = " + hlen); 21 } 22 }
1.八、hexists:判斷鍵值是否存在。格式是:hexists hash的key 項的key
操做以下:
java示例代碼:
1 import redis.clients.jedis.Jedis; 2 3 import java.util.Map; 4 5 /** 6 * redis中對於hash類型的: hexists 操做示例 7 * hexists:判斷鍵值是否存在。格式是:hexists hash的key 項的key 8 */ 9 public class Hash_hexists_operation { 10 public static void main(String[] args) { 11 Jedis jedis = new Jedis("127.0.0.1",6379); 12 13 Map<String, String> myhash = jedis.hgetAll("myhash"); 14 System.out.println("myhash = " + myhash); 15 /** 16 * 示例1: hexists hash的key 項的key 17 */ 18 Boolean hexists = jedis.hexists("myhash", "id"); 19 System.out.println("hexists = " + hexists); 20 } 21 }
1.九、hkeys:獲取全部的item的key,格式是:hkeys hash的key
操做以下:
java示例代碼:
1 import redis.clients.jedis.Jedis; 2 3 import java.util.Map; 4 import java.util.Set; 5 6 /** 7 * redis中對於hash類型的: hexists 操做示例 8 * hkeys:獲取全部的item的key,格式是:hkeys hash的key 9 */ 10 public class Hash_hkeys_operation { 11 public static void main(String[] args) { 12 Jedis jedis = new Jedis("127.0.0.1",6379); 13 14 Map<String, String> myhash = jedis.hgetAll("myhash"); 15 System.out.println("myhash = " + myhash); 16 /** 17 * 示例1: hkeys hash的key 18 */ 19 Set<String> hkeys = jedis.hkeys("myhash"); 20 System.out.println("hkeys = " + hkeys); 21 } 22 }
1.十、hvals:獲取全部的item的值,格式是:hvals hash的key
操做以下:
java示例代碼:
1 import redis.clients.jedis.Jedis; 2 3 import java.util.List; 4 import java.util.Map; 5 6 /** 7 * redis中對於hash類型的: hexists 操做示例 8 * hvals:獲取全部的item的值,格式是:hvals hash的key 9 */ 10 public class Hash_hvals_operation { 11 public static void main(String[] args) { 12 Jedis jedis = new Jedis("127.0.0.1",6379); 13 14 Map<String, String> myhash = jedis.hgetAll("myhash"); 15 System.out.println("myhash = " + myhash); 16 /** 17 * 示例1: hvals hash的key 18 */ 19 List<String> hvals = jedis.hvals("myhash"); 20 System.out.println("hvals = " + hvals); 21 } 22 }
1.十一、hincrby : 增減整數數字,格式是:hincrby Hash的key 項的key 正負整數
操做以下:
java示例代碼:
1 import redis.clients.jedis.Jedis; 2 3 import java.util.Map; 4 5 /** 6 * redis中對於hash類型的: hexists 操做示例 7 * hincrby : 增減整數數字,格式是:hincrby Hash的key 項的key 正負整數 8 */ 9 public class Hash_hincrby_operation { 10 public static void main(String[] args) { 11 Jedis jedis = new Jedis("127.0.0.1",6379); 12 13 Map<String, String> myhash = jedis.hgetAll("myhash"); 14 System.out.println("myhash = " + myhash); 15 /** 16 * 示例1: hincrby Hash的key 項的key 正負整數 17 */ 18 Long hincrBy = jedis.hincrBy("myhash", "id", 4); 19 System.out.println("hincrBy = " + hincrBy); 20 21 Map<String, String> myhash2 = jedis.hgetAll("myhash"); 22 System.out.println("myhash2 = " + myhash2); 23 } 24 }
1.十二、hincrbyfloat :增減float數值,格式是:hincrbyfloat Hash的key 項的key 正負float
操做以下:
1.1三、hsetnx : 若是項不存在則賦值,存在時什麼都不作,格式是:hsetnx Hash的key 項的key 項的值
操做以下:
java示例代碼:
1 import redis.clients.jedis.Jedis; 2 3 import java.util.Map; 4 5 /** 6 * redis中對於hash類型的: hexists 操做示例 7 * hsetnx : 若是項不存在則賦值,存在時什麼都不作,格式是:hsetnx Hash的key 項的key 項的值 8 */ 9 public class Hash_hsetnx_operation { 10 11 public static void main(String[] args) { 12 Jedis jedis = new Jedis("127.0.0.1",6379); 13 14 Map<String, String> myhash = jedis.hgetAll("myhash"); 15 System.out.println("myhash = " + myhash); 16 /** 17 * 示例1: hsetnx Hash的key 項的key 項的值 18 */ 19 jedis.hsetnx("myhash","id","123"); 20 jedis.hsetnx("myhash","address","chengdou"); 21 22 Map<String, String> myhash2 = jedis.hgetAll("myhash"); 23 System.out.println("myhash2 = " + myhash2); 24 } 25 }