1、引入依赖
Jedis是Redis官方推荐的Java连接开发工具
导入依赖
<!-- https://mvnrepository.com/artifact/redis.clients/jedis --> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>3.2.0</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.58</version> </dependency>
public static void main(String[] args) { Jedisjedis=newJedis("127.0.0.1", 6379); //查看redis是否运行 System.out.println("服务正在运行: "+jedis.ping()); //验证密码，如果没有设置密码这段代码省略 // jedis.auth("password"); jedis.connect(); //连接 jedis.disconnect(); //断开连接 jedis.flushAll(); //清空所有的key }
2、常用api
2.1、对key操作
public static void main(String[] args) { Jedisjedis = newJedis("127.0.0.1", 6379); 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','kuangshen'>的键值对：" + jedis.set("username", "kuangshen")); 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<String> 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("查看键username所存储的值的类型：" + jedis.type("username")); System.out.println("随机返回key空间的一个：" + jedis.randomKey()); System.out.println("重命名key：" + jedis.rename("username", "name")); System.out.println("取出改后的name：" + jedis.get("name")); System.out.println("按索引查询：" + jedis.select(0)); System.out.println("删除当前选择数据库中的所有key：" + jedis.flushDB()); System.out.println("返回当前数据库中key的数目：" + jedis.dbSize()); System.out.println("删除所有数据库中的所有key：" + jedis.flushAll()); }
2.2、对string操作
Jedisjedis = newJedis("127.0.0.1", 6379); 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")); 123456789 对List操作命令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("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")); try { TimeUnit.SECONDS.sleep(3); } catch (InterruptedExceptione) { e.printStackTrace(); } System.out.println(jedis.get("key3")); System.out.println("===========获取原值，更新为新值=========="); 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));
2.3、对List操作命令
public static void main(String[] args) { Jedisjedis = newJedis("127.0.0.1", 6379); jedis.flushDB(); System.out.println("===========添加一个list==========="); jedis.lpush("collections", "ArrayList", "Vector", "Stack", "HashMap", "WeakHashMap", "LinkedHashMap"); jedis.lpush("collections", "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,end为-1表示查询全部 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)); }
2.4、对set操作
public static void main(String[] args) { Jedisjedis = newJedis("127.0.0.1", 6379); jedis.flushDB(); System.out.println("============向集合中添加元素（不重复）============"); 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"));//移到集合元素 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.out.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.println("eleSet1和eleSet2的差集:" + jedis.sdiff("eleSet1", "eleSet2"));//eleSet1中有，eleSet2中没有 jedis.sinterstore("eleSet4","eleSet1","eleSet2");//求交集并将交集保存到dstkey的集合 System.out.println("eleSet4中的元素："+jedis.smembers("eleSet4")); }} }
2.5、对Hash的操作命令
public static void main(String[] args) { Jedisjedis = newJedis("127.0.0.1", 6379); jedis.flushDB(); Map<String, String> map = newHashMap <>(); map.put("key1", "value1"); map.put("key2", "value2"); map.put("key3", "value3"); map.put("key4", "value4");//添加名称为hash（key）的hash元素 jedis.hmset("hash",map);//向名称为hash的hash中添加key为key5，value为value5元素 jedis.hset("hash", "key5", "value5"); System.out.println("散列hash的所有键值对为："+jedis.hgetAll("hash")); System.out.println("散列hash的所有键为：" + jedis.hkeys("hash"));//return Set<String> System.out.println("散列hash的所有值为：" + jedis.hvals("hash"));//return List<String> 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.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")); }
