Jedis对redis的五大类型操作代码详解

网友投稿 271 2023-03-16


Jedis对redis的五大类型操作代码详解

本篇主要阐述Jedis对redis的五大类型的操作:字符串、列表、散列、集合、有序集合。

JedisUtil

这里的测试用例采用junit4进行运行,准备代码如下:

private static final String ipAddr = "10.10.195.112";

privathttp://e static final int port = 6379;

private static Jedis jedis= null;

@BeforeClass

public static void init()

{

jedis = JedisUtil.getInstance().getJedis(ipAddr, port);

}

@AfterClass

public static void close()

{

JedisUtil.getInstance().closeJedis(jedis,ipAddr, port);

}

其中JedisUtil是对jedis做的简单封装,代码如下:

import org.apache.log4j.Logger;

import java.util.HashMap;

import java.util.Map;

import redis.clients.jedis.Jedis;

import redis.clients.jedis.JedisPool;

import redis.clients.jedis.JedisPoolConfig;

public class JedisUtil

{

private Logger logger = Logger.getLogger(this.getClass().getName());

private JedisUtil(){

}

private static class RedisUtilHolder{

private static final JedisUtil instance = new JedisUtil();

}

public static JedisUtil getInstance(){

return RedisUtilHolder.instance;

}

private static Map maps = new HashMap();

private static JedisPool getPool(String ip, int port){

String key = ip+":"+port;

JedisPool pool = null;

if(!maps.containsKey(key))

{

JedisPoolConfig config = new JedisPoolConfig();

config.setMaxActive(RedisConfig.MAX_ACTIVE);

config.setMaxIdle(RedisConfig.MAX_IDLE);

config.setMaxWait(RedisConfig.MAX_WAIT);

config.setTestOnBorrow(true);

config.setTestOnReturn(true);

pool = new JedisPool(config,ip,port,RedisConfig.TIMEOUT);

maps.put(key, pool);

} else

{

pool = maps.get(key);

}

return pool;

}

public Jedis getJedis(String ip, int port)

{

Jedis jedis = null;

int count = 0;

do

{

try

{

jedis = getPool(ip,port).getResource();

}

catch (Exception e)

{

logger.error("get redis master1 failed!",e);

getPool(ip,port).returnBrokenResource(jedis);

}

}

while(jedis == null && count

return jedis;

}

public void closeJedis(Jedis jedis, String ip, int port){

if(jedis != null)

{

getPool(ip,port).returnResource(jedis);

}

}

}

public class RedisConfig

{

//可用连接实例的最大数目,默认值为8;

//如果赋值为-1,则表示不限制;如果pool已经分配了maxActive个jedis实例,则此时pool的状态为exhausted(耗尽)。

public static int MAX_ACTIVE = 1024;

//控制一个pool最多有多少个状态为idle(空闲的)的jedis实例,默认值也是8。

public static int MAX_IDLE = 200;

//等待可用连接的最大时间,单位毫秒,默认值为-1,表示永不超时。如果超过等待时间,则直接抛出JedisConnectionException;

public static int MAX_WAIT = 10000;

public static int TIMEOUT = 10000;

public static int RETRY_NUM = 5;

}

键操作

@Test public void testKey() throws InterruptedException

{

System.out.println("清空数据:"+jedis.flushDB());

System.out.println("判断某个键是否存在:"+jedis.exists("username"));

System.out.println("新增<'username','zzh'>的键值对:"+jedis.set("username", "zzh"));

System.out.println(jedis.exists("name"));

System.out.println("新增<'password','password'>的键值对:"+jedis.set("password", "password"));

System.out.print("系统中所有的键如下:");

Set keys = jedis.keys("*");

System.out.println(keys);

System.out.println("删除键password:"+jedis.del("password"));

System.out.println("判断键password是否存在:"+jedis.exists("password"));

System.out.println("设置键username的过期时间为5s:"+jedis.expire("username", 5));

TimeUnit.SECONDS.sleep(2);

System.out.println("查看键username的剩余生存时间:"+jedis.ttl("username"));

System.out.println("移除键username的生存时间:"+jedis.persist("username"));

System.out.println("查看键username的剩余生存时间:"+jedis.ttl("username"));

System.out.println("查看键username所存储的值的类型:"+jedis.type("username"));

}

输出结果:

清空数据:OK

判断某个键是否存在:false

新增<'username','zzh'>的键值对:OK

false

新增<'password','password'>的键值对:OK

系统中所有的键如下:[username, password]

删除键password:1

判断键password是否存在:false

设置键username的过期时间为5s:1

查看键username的剩余生存时间:3

移除键username的生存时间:1

查看键username的剩余生存时间:-1

查看键username所存储的值的类型:string

字符串操作

在Redis里面,字符串可以存储三种类型的值:

字节串(byte string)

整数

浮点数

字节串

@Test public void testString() throws InterruptedException

{

jedis.flushDB();

System.out.println("===========增加数据===========");

System.out.println(jedis.set("key1","value1"));

System.out.println(jedis.set("key2","value2"));

System.out.println(jedis.set("key3", "value3"));

System.out.println("删除键key2:"+jedis.del("key2"));

System.out.println("获取键key2:"+jedis.get("key2"));

System.out.println("修改key1:"+jedis.set("key1", "value1Changed"));

System.out.println("获取key1的值:"+jedis.get("key1"));

System.out.println("在key3后面加入值:"+jedis.append("key3", "End"));

System.out.println("key3的值:"+jedis.get("key3"));

System.out.println("增加多个键值对:"+jedis.mset("key01","value01","key02","value02","key03","value03"));

System.out.println("获取多个键值对:"+jedis.mget("key01","key02","key03"));

System.out.println("获取多个键值对:"+jedis.mget("key01","key02","key03","key04"));

System.out.println("删除多个键值对:"+jedis.del(new String[]{

"key01","key02"

}

));

System.out.println("获取多个键值对:"+jedis.mget("key01","key02","key03"));

jedis.flushDB();

System.out.println("===========新增键值对防止覆盖原先值==============");

System.out.println(jedis.setnx("key1", "value1"));

System.out.println(jedis.setnx("key2", "value2"));

System.out.println(jedis.setnx("key2", "value2-new"));

System.out.println(jedis.get("key1"));

System.out.println(jedis.get("key2"));

System.out.println("===========新增键值对并设置有效时间=============");

System.out.println(jedis.setex("key3", 2, "value3"));

System.out.println(jedis.get("key3"));

TimeUnit.SECONDS.sleep(3);

System.out.println(jedis.get("key3"));

System.out.println("===========获取原值,更新为新值==========");

//GETSET is an atomic set this value and return the old value command.

System.out.println(jedis.getSet("key2", "key2GetSet"));

System.out.println(jedis.get("key2"));

System.out.println("获得key2的值的字串:"+jedis.getrange("key2", 2, 4));

}

输出结果:

===========增加数据===========

OK

OK

OK

删除键key2:1

获取键key2:null

修改key1:OK

获取key1的值:value1Changed

在key3后面加入值:9

key3的值:value3End

增加多个键值对:OK

获取多个键值对:[value01, value02, value03]

获取多个键值对:[value01, value02, value03, null]

删除多个键值对:2

获取多个键值对:[null, null, value03]

===========新增键值对防止覆盖原先值==============

1

1

0

value1

value2

===========新增键值对并设置有效时间=============

OK

value3

null

===========获取原值,更新为新值==========

value2

key2GetSet

获得key2的值的字串:y2G

memcached和redis同样有append的操作,但是memcached有prepend的操作,redis中并没有。

整数和浮点数

@Test public void testNumber()

{

jedis.flushDB();

jedis.set("key1", "1");

jedis.set("key2", "2");

jedis.set("key3", "2.3");

System.out.println("key1的值:"+jedis.get("key1"));

System.out.println("key2的值:"+jedis.get("key2"));

System.out.println("key1的值加1:"+jedis.incr("key1"));

System.out.println("获取key1的值:"+jedis.get("key1"));

System.out.println("key2的值减1:"+jedis.decr("key2"));

System.out.println("获取key2的值:"+jedis.get("key2"));

System.out.println("将key1的值加上整数5:"+jedis.incrBy("key1", 5));

System.out.println("获取key1的值:"+jedis.get("key1"));

System.out.println("将key2的值减去整数5:"+jedis.decrBy("key2", 5));

System.out.println("获取key2的值:"+jedis.get("key2"));

}

输出结果:

key1的值:1

key2的值:2

key1的值加1:2

获取key1的值:2

key2的值减1:1

获取key2的值:1

将key1的值加上整数5:7

获取key1的值:7

将key2的值减去整数5:-4

获取key2的值:-4

在redis2.6或以上版本中有这个命令:incrbyfloat,即将键存储的值加上浮点数amount,jedis-2.1.0中不支持这一操作。

列表

@Test public void testList()

{

jedis.flushDB();

System.out.println("===========添加一个list===========");

jedis.lpush("collections", "ArrayList", "Vector", "Stack", "HashMap", "WeakHashMap", "LinkedHashMap");

jedis.lpush("colqhkFzrCGlections", "HashSet");

jedis.lpush("collections", "TreeSet");

jedis.lpush("collections", "TreeMap");

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));//-1代表倒数第一个元素,-2代表倒数第二个元素

System.out.println("collections区间0-3的元素:"+jedis.lrange("collections",0,3));

System.out.println("===============================");

// 删除列表指定的值 ,第二个参数为删除的个数(有重复时),后add进去的值先被删,类似于出栈

System.out.println("删除指定元素个数:"+jedis.lrem("collections", 2, "HashMap"));

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));

System.out.println("删除下表0-3区间之外的元素:"+jedis.ltrim("collections", 0, 3));

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));

System.out.println("collections列表出栈(左端):"+jedis.lpop("collections"));

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));

System.out.println("collections添加元素,从列表右端,与lpush相对应:"+jedis.rpush("collections", "EnumMap"));

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));

System.out.println("collections列表出栈(右端):"+jedis.rpop("collections"));

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));

System.out.println("修改collections指定下标1的内容:"+jedis.lset("collections", 1, "LinkedArrayList"));

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));

System.out.println("===============================");

System.out.println("collections的长度:"+jedis.llen("collections"));

System.out.println("获取collections下标为2的元素:"+jedis.lindex("collections", 2));

System.out.println("===============================");

jedis.lpush("sortedList", "3","6","2","0","7","4");

System.out.println("sortedList排序前:"+jedis.lrange("sortedList", 0, -1));

System.out.println(jedis.sort("sortedList"));

System.out.println("sortedList排序后:"+jedis.lrange("sortedList", 0, -1));

}

输出结果:

===========添加一个list===========

collections的内容:[TreeMap, TreeSet, HashSet, LinkedHashMap, WeakHashMap, HashMap, Stack, Vector, ArrayList]

collections区间0-3的元素:[TreeMap, TreeSet, HashSet, LinkedHashMap]

===============================

删除指定元素个数:1

collections的内容:[TreeMap, TreeSet, HashSet, LinkedHashMap, WeakHashMap, Stack, Vector, ArrayList]

删除下表0-3区间之外的元素:OK

collections的内容:[TreeMap, TreeSet, HashSet, LinkedHashMap]

collections列表出栈(左端):TreeMap

collections的内容:[TreeSet, HashSet, LinkedHashMap]

collections添加元素,从列表右端,与lpush相对应:4

collections的内容:[TreeSet, HashSet, LinkedHashMap, EnumMap]

collections列表出栈(右端):EnumMap

collections的内容:[TreeSet, HashSet, LinkedHashMap]

修改collections指定下标1的内容:OK

collections的内容:[TreeSet, LinkedArrayList, LinkedHashMap]

===============================

collections的长度:3

获取collections下标为2的元素:LinkedHashMap

===============================

sortedList排序前:[4, 7, 0, 2, 6, 3]

[0, 2, 3, 4, 6, 7]

sortedList排序后:[4, 7, 0, 2, 6, 3]

Redis中还有阻塞式的列表弹出命令以及在列表之间移动元素的命令:blpop, brpop, rpoplpush, brpoplpush等。

集合(Set)

@Test public void testSet()

{

jedis.flushDB();

System.out.println("============向集合中添加元素============");

System.out.println(jedis.sadd("eleSet", "e1","e2","e4","e3","e0","e8","e7","e5"));

System.out.println(jedis.sadd("eleSet", "e6"));

System.out.println(jedis.sadd("eleSet", "e6"));

System.out.println("eleSet的所有元素为:"+jedis.smembers("eleSet"));

System.out.println("删除一个元素e0:"+jedis.srem("eleSet", "e0"));

System.out.println("eleSet的所有元素为:"+jedis.smembers("eleSet"));

System.out.println("删除两个元素e7和e6:"+jedis.srem("eleSet", "e7","e6"));

System.out.println("eleSet的所有元素为:"+jedis.smembers("eleSet"));

System.out.println("随机的移除集合中的一个元素:"+jedis.spop("eleSet"));

System.out.println("随机的移除集合中的一个元素:"+jedis.spop("eleSet"));

System.out.println("eleSet的所有元素为:"+jedis.smembers("eleSet"));

System.out.println("eleSet中包含元素的个数:"+jedis.scard("eleSet"));

System.out.println("e3是否在eleSet中:"+jedis.sismember("eleSet", "e3"));

System.out.println("e1是否在eleSet中:"+jedis.sismember("eleSet", "e1"));

System.out.println("e1是否在eleSet中:"+jedis.sismember("eleSet", "e5"));

System.out.println("=================================");

System.out.println(jedis.sadd("eleSet1", "e1","e2","e4","e3","e0","e8","e7","e5"));

System.out.println(jedis.sadd("eleSet2", "e1","e2","e4","e3","e0","e8"));

System.out.println("将eleSet1中删除e1并存入eleSet3中:"+jedis.smove("eleSet1", "eleSet3", "e1"));

System.out.println("将eleSet1中删除e2并存入eleSet3中:"+jedis.smove("eleSet1", "eleSet3", "e2"));

System.out.println("eleSet1中的元素:"+jedis.smembers("eleSet1"));

System.qhkFzrCGout.println("eleSet3中的元素:"+jedis.smembers("eleSet3"));

System.out.println("============集合运算=================");

System.out.println("eleSet1中的元素:"+jedis.smembers("eleSet1"));

System.out.println("eleSet2中的元素:"+jedis.smembers("eleSet2"));

System.out.println("eleSet1和eleSet2的交集:"+jedis.sinter("eleSet1","eleSet2"));

System.out.println("eleSet1和eleSet2的并集:"+jedis.sunion("eleSet1","eleSet2"));

System.out.printlhttp://n("eleSet1和eleSet2的差集:"+jedis.sdiff("eleSet1","eleSet2"));//eleSet1中有,eleSet2中没有

}

输出结果:

============向集合中添加元素============

8

1

0

eleSet的所有元素为:[e3, e4, e1, e2, e0, e8, e7, e6, e5]

删除一个元素e0:1

eleSet的所有元素为:[e3, e4, e1, e2, e8, e7, e6, e5]

删除两个元素e7和e6:2

eleSet的所有元素为:[e3, e4, e1, e2, e8, e5]

随机的移除集合中的一个元素:e5

随机的移除集合中的一个元素:e2

eleSet的所有元素为:[e3, e4, e1, e8]

eleSet中包含元素的个数:4

e3是否在eleSet中:true

e1是否在eleSet中:true

e1是否在eleSet中:false

=================================

8

6

将eleSet1中删除e1并存入eleSet3中:1

将eleSet1中删除e2并存入eleSet3中:1

eleSet1中的元素:[e3, e4, e0, e8, e7, e5]

eleSet3中的元素:[e1, e2]

============集合运算=================

eleSet1中的元素:[e3, e4, e0, e8, e7, e5]

eleSet2中的元素:[e3, e4, e1, e2, e0, e8]

eleSet1和eleSet2的交集:[e3, e4, e0, e8]

eleSet1和eleSet2的并集:[e3, e4, e1, e2, e0, e8, e7, e5]

eleSet1和eleSet2的差集:[e7, e5]

关于Set还有一些其他命令:srandmember, sdiffstore, sinterstore, sunionstore等。

散列

@Test public void testHash()

{

jedis.flushDB();

Map map = new HashMap<>();

map.put("key1","value1");

map.put("key2","value2");

map.put("key3","value3");

map.put("key4","value4");

jedis.hmset("hash",map);

jedis.hset("hash", "key5", "value5");

System.out.println("散列hash的所有键值对为:"+jedis.hgetAll("hash"));//return Map

System.out.println("散列hash的所有键为:"+jedis.hkeys("hash"));//return Set

System.out.println("散列hash的所有值为:"+jedis.hvals("hash"));//return List

System.out.println("将key6保存的值加上一个整数,如果key6不存在则添加key6:"+jedis.hincrBy("hash", "key6", 6));

System.out.println("散列hash的所有键值对为:"+jedis.hgetAll("hash"));

System.out.println("将key6保存的值加上一个整数,如果key6不存在则添加key6:"+jedis.hincrBy("hash", "key6", 3));

System.out.println("散列hash的所有键值对为:"+jedis.hgetAll("hash"));

System.out.println("删除一个或者多个键值对:"+jedis.hdel("hash", "key2"));

System.out.println("散列hash的所有键值对为:"+jedis.http://hgetAll("hash"));

System.out.println("散列hash中键值对的个数:"+jedis.hlen("hash"));

System.out.println("判断hash中是否存在key2:"+jedis.hexists("hash","key2"));

System.out.println("判断hash中是否存在key3:"+jedis.hexists("hash","key3"));

System.out.println("获取hash中的值:"+jedis.hmget("hash","key3"));

System.out.println("获取hash中的值:"+jedis.hmget("hash","key3","key4"));

}

输出结果:

散列hash的所有键值对为:{key4=value4, key3=value3, key5=value5, key2=value2, key1=value1}

散列hash的所有键为:[key4, key3, key5, key2, key1]

散列hash的所有值为:[value4, value3, value1, value2, value5]

将key6保存的值加上一个整数,如果key6不存在则添加key6:6

散列hash的所有键值对为:{key4=value4, key3=value3, key6=6, key5=value5, key2=value2, key1=value1}

将key6保存的值加上一个整数,如果key6不存在则添加key6:9

散列hash的所有键值对为:{key4=value4, key3=value3, key6=9, key5=value5, key2=value2, key1=value1}

删除一个或者多个键值对:1

散列hash的所有键值对为:{key4=value4, key3=value3, key6=9, key5=value5, key1=value1}

散列hash中键值对的个数:5

判断hash中是否存在key2:false

判断hash中是否存在key3:true

获取hash中的值:[value3]

获取hash中的值:[value3, value4]

有序集合

@Test public void testSortedSet()

{

jedis.flushDB();

Map map = new HashMap<>();

map.put(1.2,"key2");

map.put(4.0, "key3");

map.put(5.0,"key4");

map.put(0.2,"key5");

System.out.println(jedis.zadd("zset", 3,"key1"));

System.out.println(jedis.zadd("zset",map));

System.out.println("zset中的所有元素:"+jedis.zrange("zset", 0, -1));

System.out.println("zset中的所有元素:"+jedis.zrangeWithScores("zset", 0, -1));

System.out.println("zset中的所有元素:"+jedis.zrangeByScore("zset", 0,100));

System.out.println("zset中的所有元素:"+jedis.zrangeByScoreWithScores("zset", 0,100));

System.out.println("zset中key2的分值:"+jedis.zscore("zset", "key2"));

System.out.println("zset中key2的排名:"+jedis.zrank("zset", "key2"));

System.out.println("删除zset中的元素key3:"+jedis.zrem("zset", "key3"));

System.out.println("zset中的所有元素:"+jedis.zrange("zset", 0, -1));

System.out.println("zset中元素的个数:"+jedis.zcard("zset"));

System.out.println("zset中分值在1-4之间的元素的个数:"+jedis.zcount("zset", 1, 4));

System.out.println("key2的分值加上5:"+jedis.zincrby("zset", 5, "key2"));

System.out.println("key3的分值加上4:"+jedis.zincrby("zset", 4, "key3"));

System.out.println("zset中的所有元素:"+jedis.zrange("zset", 0, -1));

}

输出结果:

1

4

zset中的所有元素:[key5, key2, key1, key3, key4]

zset中的所有元素:[[[107, 101, 121, 53],0.2], [[107, 101, 121, 50],1.2], [[107, 101, 121, 49],3.0], [[107, 101, 121, 51],4.0], [[107, 101, 121, 52],5.0]]

zset中的所有元素:[key5, key2, key1, key3, key4]

zset中的所有元素:[[[107, 101, 121, 53],0.2], [[107, 101, 121, 50],1.2], [[107, 101, 121, 49],3.0], [[107, 101, 121, 51],4.0], [[107, 101, 121, 52],5.0]]

zset中key2的分值:1.2

zset中key2的排名:1

删除zset中的元素key3:1

zset中的所有元素:[key5, key2, key1, key4]

zset中元素的个数:4

zset中分值在1-4之间的元素的个数:2

key2的分值加上5:6.2

key3的分值加上4:4.0

zset中的所有元素:[key5, key1, key3, key4, key2]

有序集合还有诸如zinterstore, zunionstore, zremrangebyscore, zremrangebyrank, zrevrank, zrevrange, zrangebyscore等命令。

排序sort

@Test public void testSort()

{

jedis.flushDB();

jedis.lpush("collections", "ArrayList", "Vector", "Stack", "HashMap", "WeakHashMap", "LinkedHashMap");

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));

SortingParams sortingParameters = new SortingParams();

System.out.println(jedis.sort("collections",sortingParameters.alpha()));

System.out.println("===============================");

jedis.lpush("sortedList", "3","6","2","0","7","4");

System.out.println("sortedList排序前:"+jedis.lrange("sortedList", 0, -1));

System.out.println("升序:"+jedis.sort("sortedList", sortingParameters.asc()));

System.out.println("升序:"+jedis.sort("sortedList", sortingParameters.desc()));

System.out.println("===============================");

jedis.lpush("userlist", "33");

jedis.lpush("userlist", "22");

jedis.lpush("userlist", "55");

jedis.lpush("userlist", "11");

jedis.hset("user:66", "name", "66");

jedis.hset("user:55", "name", "55");

jedis.hset("user:33", "name", "33");

jedis.hset("user:22", "name", "79");

jedis.hset("user:11", "name", "24");

jedis.hset("user:11", "add", "beijing");

jedis.hset("user:22", "add", "shanghai");

jedis.hset("user:33", "add", "guangzhou");

jedis.hset("user:55", "add", "chongqing");

jedis.hset("user:66", "add", "xi'an");

sortingParameters = new SortingParams();

sortingParameters.get("user:*->name");

sortingParameters.get("user:*->add");

System.out.println(jedis.sort("userlist",sortingParameters));

}

输出结果:

collections的内容:[LinkedHashMap, WeakHashMap, HashMap, Stack, Vector, ArrayList]

[ArrayList, HashMap, LinkedHashMap, Stack, Vector, WeakHashMap]

===============================

sortedList排序前:[4, 7, 0, 2, 6, 3]

升序:[0, 2, 3, 4, 6, 7]

升序:[7, 6, 4, 3, 2, 0]

===============================

[24, beijing, 79, shanghai, 33, guangzhou, 55, chongqing]

总结

以上就是本文关于Jedis对redis的五大操作代码详解的全部内容,希望对大家有所帮助。感兴趣的朋友可以继续参阅本站:

redis实现计数器-防止刷单方法介绍

Redis的主从同步解析

Java编程redisson实现分布式锁代码示例

如有不足之处,欢迎留言指出。

return jedis;

}

public void closeJedis(Jedis jedis, String ip, int port){

if(jedis != null)

{

getPool(ip,port).returnResource(jedis);

}

}

}

public class RedisConfig

{

//可用连接实例的最大数目,默认值为8;

//如果赋值为-1,则表示不限制;如果pool已经分配了maxActive个jedis实例,则此时pool的状态为exhausted(耗尽)。

public static int MAX_ACTIVE = 1024;

//控制一个pool最多有多少个状态为idle(空闲的)的jedis实例,默认值也是8。

public static int MAX_IDLE = 200;

//等待可用连接的最大时间,单位毫秒,默认值为-1,表示永不超时。如果超过等待时间,则直接抛出JedisConnectionException;

public static int MAX_WAIT = 10000;

public static int TIMEOUT = 10000;

public static int RETRY_NUM = 5;

}

键操作

@Test public void testKey() throws InterruptedException

{

System.out.println("清空数据:"+jedis.flushDB());

System.out.println("判断某个键是否存在:"+jedis.exists("username"));

System.out.println("新增<'username','zzh'>的键值对:"+jedis.set("username", "zzh"));

System.out.println(jedis.exists("name"));

System.out.println("新增<'password','password'>的键值对:"+jedis.set("password", "password"));

System.out.print("系统中所有的键如下:");

Set keys = jedis.keys("*");

System.out.println(keys);

System.out.println("删除键password:"+jedis.del("password"));

System.out.println("判断键password是否存在:"+jedis.exists("password"));

System.out.println("设置键username的过期时间为5s:"+jedis.expire("username", 5));

TimeUnit.SECONDS.sleep(2);

System.out.println("查看键username的剩余生存时间:"+jedis.ttl("username"));

System.out.println("移除键username的生存时间:"+jedis.persist("username"));

System.out.println("查看键username的剩余生存时间:"+jedis.ttl("username"));

System.out.println("查看键username所存储的值的类型:"+jedis.type("username"));

}

输出结果:

清空数据:OK

判断某个键是否存在:false

新增<'username','zzh'>的键值对:OK

false

新增<'password','password'>的键值对:OK

系统中所有的键如下:[username, password]

删除键password:1

判断键password是否存在:false

设置键username的过期时间为5s:1

查看键username的剩余生存时间:3

移除键username的生存时间:1

查看键username的剩余生存时间:-1

查看键username所存储的值的类型:string

字符串操作

在Redis里面,字符串可以存储三种类型的值:

字节串(byte string)

整数

浮点数

字节串

@Test public void testString() throws InterruptedException

{

jedis.flushDB();

System.out.println("===========增加数据===========");

System.out.println(jedis.set("key1","value1"));

System.out.println(jedis.set("key2","value2"));

System.out.println(jedis.set("key3", "value3"));

System.out.println("删除键key2:"+jedis.del("key2"));

System.out.println("获取键key2:"+jedis.get("key2"));

System.out.println("修改key1:"+jedis.set("key1", "value1Changed"));

System.out.println("获取key1的值:"+jedis.get("key1"));

System.out.println("在key3后面加入值:"+jedis.append("key3", "End"));

System.out.println("key3的值:"+jedis.get("key3"));

System.out.println("增加多个键值对:"+jedis.mset("key01","value01","key02","value02","key03","value03"));

System.out.println("获取多个键值对:"+jedis.mget("key01","key02","key03"));

System.out.println("获取多个键值对:"+jedis.mget("key01","key02","key03","key04"));

System.out.println("删除多个键值对:"+jedis.del(new String[]{

"key01","key02"

}

));

System.out.println("获取多个键值对:"+jedis.mget("key01","key02","key03"));

jedis.flushDB();

System.out.println("===========新增键值对防止覆盖原先值==============");

System.out.println(jedis.setnx("key1", "value1"));

System.out.println(jedis.setnx("key2", "value2"));

System.out.println(jedis.setnx("key2", "value2-new"));

System.out.println(jedis.get("key1"));

System.out.println(jedis.get("key2"));

System.out.println("===========新增键值对并设置有效时间=============");

System.out.println(jedis.setex("key3", 2, "value3"));

System.out.println(jedis.get("key3"));

TimeUnit.SECONDS.sleep(3);

System.out.println(jedis.get("key3"));

System.out.println("===========获取原值,更新为新值==========");

//GETSET is an atomic set this value and return the old value command.

System.out.println(jedis.getSet("key2", "key2GetSet"));

System.out.println(jedis.get("key2"));

System.out.println("获得key2的值的字串:"+jedis.getrange("key2", 2, 4));

}

输出结果:

===========增加数据===========

OK

OK

OK

删除键key2:1

获取键key2:null

修改key1:OK

获取key1的值:value1Changed

在key3后面加入值:9

key3的值:value3End

增加多个键值对:OK

获取多个键值对:[value01, value02, value03]

获取多个键值对:[value01, value02, value03, null]

删除多个键值对:2

获取多个键值对:[null, null, value03]

===========新增键值对防止覆盖原先值==============

1

1

0

value1

value2

===========新增键值对并设置有效时间=============

OK

value3

null

===========获取原值,更新为新值==========

value2

key2GetSet

获得key2的值的字串:y2G

memcached和redis同样有append的操作,但是memcached有prepend的操作,redis中并没有。

整数和浮点数

@Test public void testNumber()

{

jedis.flushDB();

jedis.set("key1", "1");

jedis.set("key2", "2");

jedis.set("key3", "2.3");

System.out.println("key1的值:"+jedis.get("key1"));

System.out.println("key2的值:"+jedis.get("key2"));

System.out.println("key1的值加1:"+jedis.incr("key1"));

System.out.println("获取key1的值:"+jedis.get("key1"));

System.out.println("key2的值减1:"+jedis.decr("key2"));

System.out.println("获取key2的值:"+jedis.get("key2"));

System.out.println("将key1的值加上整数5:"+jedis.incrBy("key1", 5));

System.out.println("获取key1的值:"+jedis.get("key1"));

System.out.println("将key2的值减去整数5:"+jedis.decrBy("key2", 5));

System.out.println("获取key2的值:"+jedis.get("key2"));

}

输出结果:

key1的值:1

key2的值:2

key1的值加1:2

获取key1的值:2

key2的值减1:1

获取key2的值:1

将key1的值加上整数5:7

获取key1的值:7

将key2的值减去整数5:-4

获取key2的值:-4

在redis2.6或以上版本中有这个命令:incrbyfloat,即将键存储的值加上浮点数amount,jedis-2.1.0中不支持这一操作。

列表

@Test public void testList()

{

jedis.flushDB();

System.out.println("===========添加一个list===========");

jedis.lpush("collections", "ArrayList", "Vector", "Stack", "HashMap", "WeakHashMap", "LinkedHashMap");

jedis.lpush("colqhkFzrCGlections", "HashSet");

jedis.lpush("collections", "TreeSet");

jedis.lpush("collections", "TreeMap");

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));//-1代表倒数第一个元素,-2代表倒数第二个元素

System.out.println("collections区间0-3的元素:"+jedis.lrange("collections",0,3));

System.out.println("===============================");

// 删除列表指定的值 ,第二个参数为删除的个数(有重复时),后add进去的值先被删,类似于出栈

System.out.println("删除指定元素个数:"+jedis.lrem("collections", 2, "HashMap"));

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));

System.out.println("删除下表0-3区间之外的元素:"+jedis.ltrim("collections", 0, 3));

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));

System.out.println("collections列表出栈(左端):"+jedis.lpop("collections"));

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));

System.out.println("collections添加元素,从列表右端,与lpush相对应:"+jedis.rpush("collections", "EnumMap"));

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));

System.out.println("collections列表出栈(右端):"+jedis.rpop("collections"));

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));

System.out.println("修改collections指定下标1的内容:"+jedis.lset("collections", 1, "LinkedArrayList"));

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));

System.out.println("===============================");

System.out.println("collections的长度:"+jedis.llen("collections"));

System.out.println("获取collections下标为2的元素:"+jedis.lindex("collections", 2));

System.out.println("===============================");

jedis.lpush("sortedList", "3","6","2","0","7","4");

System.out.println("sortedList排序前:"+jedis.lrange("sortedList", 0, -1));

System.out.println(jedis.sort("sortedList"));

System.out.println("sortedList排序后:"+jedis.lrange("sortedList", 0, -1));

}

输出结果:

===========添加一个list===========

collections的内容:[TreeMap, TreeSet, HashSet, LinkedHashMap, WeakHashMap, HashMap, Stack, Vector, ArrayList]

collections区间0-3的元素:[TreeMap, TreeSet, HashSet, LinkedHashMap]

===============================

删除指定元素个数:1

collections的内容:[TreeMap, TreeSet, HashSet, LinkedHashMap, WeakHashMap, Stack, Vector, ArrayList]

删除下表0-3区间之外的元素:OK

collections的内容:[TreeMap, TreeSet, HashSet, LinkedHashMap]

collections列表出栈(左端):TreeMap

collections的内容:[TreeSet, HashSet, LinkedHashMap]

collections添加元素,从列表右端,与lpush相对应:4

collections的内容:[TreeSet, HashSet, LinkedHashMap, EnumMap]

collections列表出栈(右端):EnumMap

collections的内容:[TreeSet, HashSet, LinkedHashMap]

修改collections指定下标1的内容:OK

collections的内容:[TreeSet, LinkedArrayList, LinkedHashMap]

===============================

collections的长度:3

获取collections下标为2的元素:LinkedHashMap

===============================

sortedList排序前:[4, 7, 0, 2, 6, 3]

[0, 2, 3, 4, 6, 7]

sortedList排序后:[4, 7, 0, 2, 6, 3]

Redis中还有阻塞式的列表弹出命令以及在列表之间移动元素的命令:blpop, brpop, rpoplpush, brpoplpush等。

集合(Set)

@Test public void testSet()

{

jedis.flushDB();

System.out.println("============向集合中添加元素============");

System.out.println(jedis.sadd("eleSet", "e1","e2","e4","e3","e0","e8","e7","e5"));

System.out.println(jedis.sadd("eleSet", "e6"));

System.out.println(jedis.sadd("eleSet", "e6"));

System.out.println("eleSet的所有元素为:"+jedis.smembers("eleSet"));

System.out.println("删除一个元素e0:"+jedis.srem("eleSet", "e0"));

System.out.println("eleSet的所有元素为:"+jedis.smembers("eleSet"));

System.out.println("删除两个元素e7和e6:"+jedis.srem("eleSet", "e7","e6"));

System.out.println("eleSet的所有元素为:"+jedis.smembers("eleSet"));

System.out.println("随机的移除集合中的一个元素:"+jedis.spop("eleSet"));

System.out.println("随机的移除集合中的一个元素:"+jedis.spop("eleSet"));

System.out.println("eleSet的所有元素为:"+jedis.smembers("eleSet"));

System.out.println("eleSet中包含元素的个数:"+jedis.scard("eleSet"));

System.out.println("e3是否在eleSet中:"+jedis.sismember("eleSet", "e3"));

System.out.println("e1是否在eleSet中:"+jedis.sismember("eleSet", "e1"));

System.out.println("e1是否在eleSet中:"+jedis.sismember("eleSet", "e5"));

System.out.println("=================================");

System.out.println(jedis.sadd("eleSet1", "e1","e2","e4","e3","e0","e8","e7","e5"));

System.out.println(jedis.sadd("eleSet2", "e1","e2","e4","e3","e0","e8"));

System.out.println("将eleSet1中删除e1并存入eleSet3中:"+jedis.smove("eleSet1", "eleSet3", "e1"));

System.out.println("将eleSet1中删除e2并存入eleSet3中:"+jedis.smove("eleSet1", "eleSet3", "e2"));

System.out.println("eleSet1中的元素:"+jedis.smembers("eleSet1"));

System.qhkFzrCGout.println("eleSet3中的元素:"+jedis.smembers("eleSet3"));

System.out.println("============集合运算=================");

System.out.println("eleSet1中的元素:"+jedis.smembers("eleSet1"));

System.out.println("eleSet2中的元素:"+jedis.smembers("eleSet2"));

System.out.println("eleSet1和eleSet2的交集:"+jedis.sinter("eleSet1","eleSet2"));

System.out.println("eleSet1和eleSet2的并集:"+jedis.sunion("eleSet1","eleSet2"));

System.out.printlhttp://n("eleSet1和eleSet2的差集:"+jedis.sdiff("eleSet1","eleSet2"));//eleSet1中有,eleSet2中没有

}

输出结果:

============向集合中添加元素============

8

1

0

eleSet的所有元素为:[e3, e4, e1, e2, e0, e8, e7, e6, e5]

删除一个元素e0:1

eleSet的所有元素为:[e3, e4, e1, e2, e8, e7, e6, e5]

删除两个元素e7和e6:2

eleSet的所有元素为:[e3, e4, e1, e2, e8, e5]

随机的移除集合中的一个元素:e5

随机的移除集合中的一个元素:e2

eleSet的所有元素为:[e3, e4, e1, e8]

eleSet中包含元素的个数:4

e3是否在eleSet中:true

e1是否在eleSet中:true

e1是否在eleSet中:false

=================================

8

6

将eleSet1中删除e1并存入eleSet3中:1

将eleSet1中删除e2并存入eleSet3中:1

eleSet1中的元素:[e3, e4, e0, e8, e7, e5]

eleSet3中的元素:[e1, e2]

============集合运算=================

eleSet1中的元素:[e3, e4, e0, e8, e7, e5]

eleSet2中的元素:[e3, e4, e1, e2, e0, e8]

eleSet1和eleSet2的交集:[e3, e4, e0, e8]

eleSet1和eleSet2的并集:[e3, e4, e1, e2, e0, e8, e7, e5]

eleSet1和eleSet2的差集:[e7, e5]

关于Set还有一些其他命令:srandmember, sdiffstore, sinterstore, sunionstore等。

散列

@Test public void testHash()

{

jedis.flushDB();

Map map = new HashMap<>();

map.put("key1","value1");

map.put("key2","value2");

map.put("key3","value3");

map.put("key4","value4");

jedis.hmset("hash",map);

jedis.hset("hash", "key5", "value5");

System.out.println("散列hash的所有键值对为:"+jedis.hgetAll("hash"));//return Map

System.out.println("散列hash的所有键为:"+jedis.hkeys("hash"));//return Set

System.out.println("散列hash的所有值为:"+jedis.hvals("hash"));//return List

System.out.println("将key6保存的值加上一个整数,如果key6不存在则添加key6:"+jedis.hincrBy("hash", "key6", 6));

System.out.println("散列hash的所有键值对为:"+jedis.hgetAll("hash"));

System.out.println("将key6保存的值加上一个整数,如果key6不存在则添加key6:"+jedis.hincrBy("hash", "key6", 3));

System.out.println("散列hash的所有键值对为:"+jedis.hgetAll("hash"));

System.out.println("删除一个或者多个键值对:"+jedis.hdel("hash", "key2"));

System.out.println("散列hash的所有键值对为:"+jedis.http://hgetAll("hash"));

System.out.println("散列hash中键值对的个数:"+jedis.hlen("hash"));

System.out.println("判断hash中是否存在key2:"+jedis.hexists("hash","key2"));

System.out.println("判断hash中是否存在key3:"+jedis.hexists("hash","key3"));

System.out.println("获取hash中的值:"+jedis.hmget("hash","key3"));

System.out.println("获取hash中的值:"+jedis.hmget("hash","key3","key4"));

}

输出结果:

散列hash的所有键值对为:{key4=value4, key3=value3, key5=value5, key2=value2, key1=value1}

散列hash的所有键为:[key4, key3, key5, key2, key1]

散列hash的所有值为:[value4, value3, value1, value2, value5]

将key6保存的值加上一个整数,如果key6不存在则添加key6:6

散列hash的所有键值对为:{key4=value4, key3=value3, key6=6, key5=value5, key2=value2, key1=value1}

将key6保存的值加上一个整数,如果key6不存在则添加key6:9

散列hash的所有键值对为:{key4=value4, key3=value3, key6=9, key5=value5, key2=value2, key1=value1}

删除一个或者多个键值对:1

散列hash的所有键值对为:{key4=value4, key3=value3, key6=9, key5=value5, key1=value1}

散列hash中键值对的个数:5

判断hash中是否存在key2:false

判断hash中是否存在key3:true

获取hash中的值:[value3]

获取hash中的值:[value3, value4]

有序集合

@Test public void testSortedSet()

{

jedis.flushDB();

Map map = new HashMap<>();

map.put(1.2,"key2");

map.put(4.0, "key3");

map.put(5.0,"key4");

map.put(0.2,"key5");

System.out.println(jedis.zadd("zset", 3,"key1"));

System.out.println(jedis.zadd("zset",map));

System.out.println("zset中的所有元素:"+jedis.zrange("zset", 0, -1));

System.out.println("zset中的所有元素:"+jedis.zrangeWithScores("zset", 0, -1));

System.out.println("zset中的所有元素:"+jedis.zrangeByScore("zset", 0,100));

System.out.println("zset中的所有元素:"+jedis.zrangeByScoreWithScores("zset", 0,100));

System.out.println("zset中key2的分值:"+jedis.zscore("zset", "key2"));

System.out.println("zset中key2的排名:"+jedis.zrank("zset", "key2"));

System.out.println("删除zset中的元素key3:"+jedis.zrem("zset", "key3"));

System.out.println("zset中的所有元素:"+jedis.zrange("zset", 0, -1));

System.out.println("zset中元素的个数:"+jedis.zcard("zset"));

System.out.println("zset中分值在1-4之间的元素的个数:"+jedis.zcount("zset", 1, 4));

System.out.println("key2的分值加上5:"+jedis.zincrby("zset", 5, "key2"));

System.out.println("key3的分值加上4:"+jedis.zincrby("zset", 4, "key3"));

System.out.println("zset中的所有元素:"+jedis.zrange("zset", 0, -1));

}

输出结果:

1

4

zset中的所有元素:[key5, key2, key1, key3, key4]

zset中的所有元素:[[[107, 101, 121, 53],0.2], [[107, 101, 121, 50],1.2], [[107, 101, 121, 49],3.0], [[107, 101, 121, 51],4.0], [[107, 101, 121, 52],5.0]]

zset中的所有元素:[key5, key2, key1, key3, key4]

zset中的所有元素:[[[107, 101, 121, 53],0.2], [[107, 101, 121, 50],1.2], [[107, 101, 121, 49],3.0], [[107, 101, 121, 51],4.0], [[107, 101, 121, 52],5.0]]

zset中key2的分值:1.2

zset中key2的排名:1

删除zset中的元素key3:1

zset中的所有元素:[key5, key2, key1, key4]

zset中元素的个数:4

zset中分值在1-4之间的元素的个数:2

key2的分值加上5:6.2

key3的分值加上4:4.0

zset中的所有元素:[key5, key1, key3, key4, key2]

有序集合还有诸如zinterstore, zunionstore, zremrangebyscore, zremrangebyrank, zrevrank, zrevrange, zrangebyscore等命令。

排序sort

@Test public void testSort()

{

jedis.flushDB();

jedis.lpush("collections", "ArrayList", "Vector", "Stack", "HashMap", "WeakHashMap", "LinkedHashMap");

System.out.println("collections的内容:"+jedis.lrange("collections", 0, -1));

SortingParams sortingParameters = new SortingParams();

System.out.println(jedis.sort("collections",sortingParameters.alpha()));

System.out.println("===============================");

jedis.lpush("sortedList", "3","6","2","0","7","4");

System.out.println("sortedList排序前:"+jedis.lrange("sortedList", 0, -1));

System.out.println("升序:"+jedis.sort("sortedList", sortingParameters.asc()));

System.out.println("升序:"+jedis.sort("sortedList", sortingParameters.desc()));

System.out.println("===============================");

jedis.lpush("userlist", "33");

jedis.lpush("userlist", "22");

jedis.lpush("userlist", "55");

jedis.lpush("userlist", "11");

jedis.hset("user:66", "name", "66");

jedis.hset("user:55", "name", "55");

jedis.hset("user:33", "name", "33");

jedis.hset("user:22", "name", "79");

jedis.hset("user:11", "name", "24");

jedis.hset("user:11", "add", "beijing");

jedis.hset("user:22", "add", "shanghai");

jedis.hset("user:33", "add", "guangzhou");

jedis.hset("user:55", "add", "chongqing");

jedis.hset("user:66", "add", "xi'an");

sortingParameters = new SortingParams();

sortingParameters.get("user:*->name");

sortingParameters.get("user:*->add");

System.out.println(jedis.sort("userlist",sortingParameters));

}

输出结果:

collections的内容:[LinkedHashMap, WeakHashMap, HashMap, Stack, Vector, ArrayList]

[ArrayList, HashMap, LinkedHashMap, Stack, Vector, WeakHashMap]

===============================

sortedList排序前:[4, 7, 0, 2, 6, 3]

升序:[0, 2, 3, 4, 6, 7]

升序:[7, 6, 4, 3, 2, 0]

===============================

[24, beijing, 79, shanghai, 33, guangzhou, 55, chongqing]

总结

以上就是本文关于Jedis对redis的五大操作代码详解的全部内容,希望对大家有所帮助。感兴趣的朋友可以继续参阅本站:

redis实现计数器-防止刷单方法介绍

Redis的主从同步解析

Java编程redisson实现分布式锁代码示例

如有不足之处,欢迎留言指出。


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