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"));
}
