Redis在java中的使用
1.Redis Windows安装
下载链接：https://github.com/dmajkic/redis/downloads
根据自己的需要选择32位，64位的redis，然后存到一个指定的目录，比如：F:\Redis
① 打开cmd ,进入F:\Redis
② 执行redis-server.exe redis.conf
③ 另外重新开一个cmd，执行redis-cli.exe -h 127.0.0.1 -p 6379
④ 测试：set mykey li
get mykey
可以得到"li"，说明服务已打开。
2.在java中的使用
使用Java操作Redis需要jedis-2.1.0.jar，下载地址：https://files.cnblogs.com/liuling/jedis-2.1.0.jar.zip
如果需要使用Redis连接池的话，还需commons-pool-1.5.4.jar，下载地址:https://files.cnblogs.com/liuling/commons-pool-1.5.4.jar.zip
package com.redis.test; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Set; import redis.clients.jedis.Jedis; import redis.clients.jedis.JedisPool; import redis.clients.jedis.JedisPoolConfig; import redis.clients.jedis.JedisShardInfo; import redis.clients.jedis.ShardedJedis; import redis.clients.jedis.ShardedJedisPool; import redis.clients.jedis.SortingParams; public class RedisClient { private Jedis jedis;//非切片额客户端连接 private JedisPool jedisPool;//非切片连接池 private ShardedJedis shardedJedis;//切片额客户端连接 private ShardedJedisPool shardedJedisPool;//切片连接池 public RedisClient() { initialPool(); initialShardedPool(); shardedJedis = shardedJedisPool.getResource(); jedis = jedisPool.getResource(); } /** * 初始化非切片池 */ private void initialPool() { // 池基本配置 JedisPoolConfig config = new JedisPoolConfig(); config.setMaxActive(20); config.setMaxIdle(5); config.setMaxWait(1000l); config.setTestOnBorrow(false); jedisPool = new JedisPool(config,"127.0.0.1",6379); } /** * 初始化切片池 */ private void initialShardedPool() { // 池基本配置 JedisPoolConfig config = new JedisPoolConfig(); config.setMaxActive(20); config.setMaxIdle(5); config.setMaxWait(1000l); config.setTestOnBorrow(false); // slave链接 List<JedisShardInfo> shards = new ArrayList<JedisShardInfo>(); shards.add(new JedisShardInfo("127.0.0.1", 6379, "master")); // 构造池 shardedJedisPool = new ShardedJedisPool(config, shards); } public void show() { KeyOperate(); StringOperate(); ListOperate(); SetOperate(); SortedSetOperate(); HashOperate(); jedisPool.returnResource(jedis); shardedJedisPool.returnResource(shardedJedis); } private void KeyOperate() { System.out.println("======================key=========================="); // 清空数据 System.out.println("清空库中所有数据："+jedis.flushDB()); // 判断key否存在 System.out.println("判断key999键是否存在："+shardedJedis.exists("key999")); System.out.println("新增key001,value001键值对："+shardedJedis.set("key001", "value001")); System.out.println("判断key001是否存在："+shardedJedis.exists("key001")); // 输出系统中所有的key System.out.println("新增key002,value002键值对："+shardedJedis.set("key002", "value002")); System.out.println("系统中所有键如下："); Set<String> keys = jedis.keys("*"); Iterator<String> it=keys.iterator() ; while(it.hasNext()){ String key = it.next(); System.out.println(key); } // 删除某个key,若key不存在，则忽略该命令。 System.out.println("系统中删除key002: "+jedis.del("key002")); System.out.println("判断key002是否存在："+shardedJedis.exists("key002")); // 设置 key001的过期时间 System.out.println("设置 key001的过期时间为5秒:"+jedis.expire("key001", 5)); try{ Thread.sleep(2000); } catch (InterruptedException e){ } // 查看某个key的剩余生存时间,单位【秒】.永久生存或者不存在的都返回-1 System.out.println("查看key001的剩余生存时间："+jedis.ttl("key001")); // 移除某个key的生存时间 System.out.println("移除key001的生存时间："+jedis.persist("key001")); System.out.println("查看key001的剩余生存时间："+jedis.ttl("key001")); // 查看key所储存的值的类型 System.out.println("查看key所储存的值的类型："+jedis.type("key001")); /* * 一些其他方法：1、修改键名：jedis.rename("key6", "key0"); * 2、将当前db的key移动到给定的db当中：jedis.move("foo", 1) */ } private void StringOperate() { System.out.println("======================String_1=========================="); // 清空数据 System.out.println("清空库中所有数据："+jedis.flushDB()); System.out.println("=============增============="); jedis.set("key001","value001"); jedis.set("key002","value002"); jedis.set("key003","value003"); System.out.println("已新增的3个键值对如下："); System.out.println(jedis.get("key001")); System.out.println(jedis.get("key002")); System.out.println(jedis.get("key003")); System.out.println("=============删============="); System.out.println("删除key003键值对："+jedis.del("key003")); System.out.println("获取key003键对应的值："+jedis.get("key003")); System.out.println("=============改============="); //1、直接覆盖原来的数据 System.out.println("直接覆盖key001原来的数据："+jedis.set("key001","value001-update")); System.out.println("获取key001对应的新值："+jedis.get("key001")); //2、直接覆盖原来的数据 System.out.println("在key002原来值后面追加："+jedis.append("key002","+appendString")); System.out.println("获取key002对应的新值"+jedis.get("key002")); System.out.println("=============增，删，查（多个）============="); /** * mset,mget同时新增，修改，查询多个键值对 * 等价于： * jedis.set("name","ssss"); * jedis.set("jarorwar","xxxx"); */ System.out.println("一次性新增key201,key202,key203,key204及其对应值："+jedis.mset("key201","value201", "key202","value202","key203","value203","key204","value204")); System.out.println("一次性获取key201,key202,key203,key204各自对应的值："+ jedis.mget("key201","key202","key203","key204")); System.out.println("一次性删除key201,key202："+jedis.del(new String[]{"key201", "key202"})); System.out.println("一次性获取key201,key202,key203,key204各自对应的值："+ jedis.mget("key201","key202","key203","key204")); System.out.println(); //jedis具备的功能shardedJedis中也可直接使用，下面测试一些前面没用过的方法 System.out.println("======================String_2=========================="); // 清空数据 System.out.println("清空库中所有数据："+jedis.flushDB()); System.out.println("=============新增键值对时防止覆盖原先值============="); System.out.println("原先key301不存在时，新增key301："+shardedJedis.setnx("key301", "value301")); System.out.println("原先key302不存在时，新增key302："+shardedJedis.setnx("key302", "value302")); System.out.println("当key302存在时，尝试新增key302："+shardedJedis.setnx("key302", "value302_new")); System.out.println("获取key301对应的值："+shardedJedis.get("key301")); System.out.println("获取key302对应的值："+shardedJedis.get("key302")); System.out.println("=============超过有效期键值对被删除============="); // 设置key的有效期，并存储数据 System.out.println("新增key303，并指定过期时间为2秒"+shardedJedis.setex("key303", 2, "key303-2second")); System.out.println("获取key303对应的值："+shardedJedis.get("key303")); try{ Thread.sleep(3000); } catch (InterruptedException e){ } System.out.println("3秒之后，获取key303对应的值："+shardedJedis.get("key303")); System.out.println("=============获取原值，更新为新值一步完成============="); System.out.println("key302原值："+shardedJedis.getSet("key302", "value302-after-getset")); System.out.println("key302新值："+shardedJedis.get("key302")); System.out.println("=============获取子串============="); System.out.println("获取key302对应值中的子串："+shardedJedis.getrange("key302", 5, 7)); } private void ListOperate() { System.out.println("======================list=========================="); // 清空数据 System.out.println("清空库中所有数据："+jedis.flushDB()); System.out.println("=============增============="); shardedJedis.lpush("stringlists", "vector"); shardedJedis.lpush("stringlists", "ArrayList"); shardedJedis.lpush("stringlists", "vector"); shardedJedis.lpush("stringlists", "vector"); shardedJedis.lpush("stringlists", "LinkedList"); shardedJedis.lpush("stringlists", "MapList"); shardedJedis.lpush("stringlists", "SerialList"); shardedJedis.lpush("stringlists", "HashList"); shardedJedis.lpush("numberlists", "3"); shardedJedis.lpush("numberlists", "1"); shardedJedis.lpush("numberlists", "5"); shardedJedis.lpush("numberlists", "2"); System.out.println("所有元素-stringlists："+shardedJedis.lrange("stringlists", 0, -1)); System.out.println("所有元素-numberlists："+shardedJedis.lrange("numberlists", 0, -1)); System.out.println("=============删============="); // 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("成功删除指定元素个数-stringlists："+shardedJedis.lrem("stringlists", 2, "vector")); System.out.println("删除指定元素之后-stringlists："+shardedJedis.lrange("stringlists", 0, -1)); // 删除区间以外的数据 System.out.println("删除下标0-3区间之外的元素："+shardedJedis.ltrim("stringlists", 0, 3)); System.out.println("删除指定区间之外元素后-stringlists："+shardedJedis.lrange("stringlists", 0, -1)); // 列表元素出栈 System.out.println("出栈元素："+shardedJedis.lpop("stringlists")); System.out.println("元素出栈后-stringlists："+shardedJedis.lrange("stringlists", 0, -1)); System.out.println("=============改============="); // 修改列表中指定下标的值 shardedJedis.lset("stringlists", 0, "hello list!"); System.out.println("下标为0的值修改后-stringlists："+shardedJedis.lrange("stringlists", 0, -1)); System.out.println("=============查============="); // 数组长度 System.out.println("长度-stringlists："+shardedJedis.llen("stringlists")); System.out.println("长度-numberlists："+shardedJedis.llen("numberlists")); // 排序 /* * list中存字符串时必须指定参数为alpha，如果不使用SortingParams，而是直接使用sort("list")， * 会出现"ERR One or more scores can't be converted into double" */ SortingParams sortingParameters = new SortingParams(); sortingParameters.alpha(); sortingParameters.limit(0, 3); System.out.println("返回排序后的结果-stringlists："+shardedJedis.sort("stringlists",sortingParameters)); System.out.println("返回排序后的结果-numberlists："+shardedJedis.sort("numberlists")); // 子串： start为元素下标，end也为元素下标；-1代表倒数一个元素，-2代表倒数第二个元素 System.out.println("子串-第二个开始到结束："+shardedJedis.lrange("stringlists", 1, -1)); // 获取列表指定下标的值 System.out.println("获取下标为2的元素："+shardedJedis.lindex("stringlists", 2)+"\n"); } private void SetOperate() { System.out.println("======================set=========================="); // 清空数据 System.out.println("清空库中所有数据："+jedis.flushDB()); System.out.println("=============增============="); System.out.println("向sets集合中加入元素element001："+jedis.sadd("sets", "element001")); System.out.println("向sets集合中加入元素element002："+jedis.sadd("sets", "element002")); System.out.println("向sets集合中加入元素element003："+jedis.sadd("sets", "element003")); System.out.println("向sets集合中加入元素element004："+jedis.sadd("sets", "element004")); System.out.println("查看sets集合中的所有元素:"+jedis.smembers("sets")); System.out.println(); System.out.println("=============删============="); System.out.println("集合sets中删除元素element003："+jedis.srem("sets", "element003")); System.out.println("查看sets集合中的所有元素:"+jedis.smembers("sets")); /*System.out.println("sets集合中任意位置的元素出栈："+jedis.spop("sets"));//注：出栈元素位置居然不定？--无实际意义 System.out.println("查看sets集合中的所有元素:"+jedis.smembers("sets"));*/ System.out.println(); System.out.println("=============改============="); System.out.println(); System.out.println("=============查============="); System.out.println("判断element001是否在集合sets中："+jedis.sismember("sets", "element001")); System.out.println("循环查询获取sets中的每个元素："); Set<String> set = jedis.smembers("sets"); Iterator<String> it=set.iterator() ; while(it.hasNext()){ Object obj=it.next(); System.out.println(obj); } System.out.println(); System.out.println("=============集合运算============="); System.out.println("sets1中添加元素element001："+jedis.sadd("sets1", "element001")); System.out.println("sets1中添加元素element002："+jedis.sadd("sets1", "element002")); System.out.println("sets1中添加元素element003："+jedis.sadd("sets1", "element003")); System.out.println("sets1中添加元素element002："+jedis.sadd("sets2", "element002")); System.out.println("sets1中添加元素element003："+jedis.sadd("sets2", "element003")); System.out.println("sets1中添加元素element004："+jedis.sadd("sets2", "element004")); System.out.println("查看sets1集合中的所有元素:"+jedis.smembers("sets1")); System.out.println("查看sets2集合中的所有元素:"+jedis.smembers("sets2")); System.out.println("sets1和sets2交集："+jedis.sinter("sets1", "sets2")); System.out.println("sets1和sets2并集："+jedis.sunion("sets1", "sets2")); System.out.println("sets1和sets2差集："+jedis.sdiff("sets1", "sets2"));//差集：set1中有，set2中没有的元素 } private void SortedSetOperate() { System.out.println("======================zset=========================="); // 清空数据 System.out.println(jedis.flushDB()); System.out.println("=============增============="); System.out.println("zset中添加元素element001："+shardedJedis.zadd("zset", 7.0, "element001")); System.out.println("zset中添加元素element002："+shardedJedis.zadd("zset", 8.0, "element002")); System.out.println("zset中添加元素element003："+shardedJedis.zadd("zset", 2.0, "element003")); System.out.println("zset中添加元素element004："+shardedJedis.zadd("zset", 3.0, "element004")); System.out.println("zset集合中的所有元素："+shardedJedis.zrange("zset", 0, -1));//按照权重值排序 System.out.println(); System.out.println("=============删============="); System.out.println("zset中删除元素element002："+shardedJedis.zrem("zset", "element002")); System.out.println("zset集合中的所有元素："+shardedJedis.zrange("zset", 0, -1)); System.out.println(); System.out.println("=============改============="); System.out.println(); System.out.println("=============查============="); System.out.println("统计zset集合中的元素中个数："+shardedJedis.zcard("zset")); System.out.println("统计zset集合中权重某个范围内（1.0——5.0），元素的个数："+shardedJedis.zcount("zset", 1.0, 5.0)); System.out.println("查看zset集合中element004的权重："+shardedJedis.zscore("zset", "element004")); System.out.println("查看下标1到2范围内的元素值："+shardedJedis.zrange("zset", 1, 2)); } private void HashOperate() { System.out.println("======================hash=========================="); //清空数据 System.out.println(jedis.flushDB()); System.out.println("=============增============="); System.out.println("hashs中添加key001和value001键值对："+shardedJedis.hset("hashs", "key001", "value001")); System.out.println("hashs中添加key002和value002键值对："+shardedJedis.hset("hashs", "key002", "value002")); System.out.println("hashs中添加key003和value003键值对："+shardedJedis.hset("hashs", "key003", "value003")); System.out.println("新增key004和4的整型键值对："+shardedJedis.hincrBy("hashs", "key004", 4l)); System.out.println("hashs中的所有值："+shardedJedis.hvals("hashs")); System.out.println(); System.out.println("=============删============="); System.out.println("hashs中删除key002键值对："+shardedJedis.hdel("hashs", "key002")); System.out.println("hashs中的所有值："+shardedJedis.hvals("hashs")); System.out.println(); System.out.println("=============改============="); System.out.println("key004整型键值的值增加100："+shardedJedis.hincrBy("hashs", "key004", 100l)); System.out.println("hashs中的所有值："+shardedJedis.hvals("hashs")); System.out.println(); System.out.println("=============查============="); System.out.println("判断key003是否存在："+shardedJedis.hexists("hashs", "key003")); System.out.println("获取key004对应的值："+shardedJedis.hget("hashs", "key004")); System.out.println("批量获取key001和key003对应的值："+shardedJedis.hmget("hashs", "key001", "key003")); System.out.println("获取hashs中所有的key："+shardedJedis.hkeys("hashs")); System.out.println("获取hashs中所有的value："+shardedJedis.hvals("hashs")); System.out.println(); } }
测试：
public class Main { public static void main(String[] args) { new RedisClient().show(); } }
