Redis常用命令以及程式碼例項
阿新 • • 發佈：2019-01-04
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 RedisTest { private Jedis jedis;// 非切片額客戶端連線 private JedisPool jedisPool;// 非切片連線池 private ShardedJedis shardedJedis;// 切片額客戶端連線 private ShardedJedisPool shardedJedisPool;// 切片連線池 public RedisTest() { 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連結 List<JedisShardInfo> shards = new ArrayList<JedisShardInfo>(); shards.add(new JedisShardInfo("127.0.0.1", 6379, "master")); // 構造池 shardedJedisPool = new ShardedJedisPool(config, shards); } public void show() { //KeyOperate(); //StringOperate(); //ListOperate(); //SetOperate(); //SortedSetOperate(); HashOperate(); jedisPool.returnResource(jedis); shardedJedisPool.returnResource(shardedJedis); } /** * key功能 */ private void KeyOperate() { System.out.println("======================key=========================="); // 清空資料 System.out.println("清空庫中所有資料："+jedis.flushDB()); // 判斷key否存在 System.out.println("判斷key999鍵是否存在："+shardedJedis.exists("key999")); System.out.println("新增key001,value001鍵值對："+shardedJedis.set("key001", "value001")); System.out.println("判斷key001是否存在："+shardedJedis.exists("key001")); // 輸出系統中所有的key System.out.println("新增key002,value002鍵值對："+shardedJedis.set("key002", "value002")); System.out.println("系統中所有鍵如下："); Set<String> keys = jedis.keys("*"); Iterator<String> it=keys.iterator() ; while(it.hasNext()){ String key = it.next(); System.out.println(key); } // 刪除某個key,若key不存在，則忽略該命令。 System.out.println("系統中刪除key002: "+jedis.del("key002")); System.out.println("判斷key002是否存在："+shardedJedis.exists("key002")); // 設定 key001的過期時間 System.out.println("設定 key001的過期時間為5秒:"+jedis.expire("key001", 5)); try{ Thread.sleep(2000); } catch (InterruptedException e){ } // 檢視某個key的剩餘生存時間,單位【秒】.永久生存或者不存在的都返回-1 System.out.println("檢視key001的剩餘生存時間："+jedis.ttl("key001")); // 移除某個key的生存時間 System.out.println("移除key001的生存時間："+jedis.persist("key001")); System.out.println("檢視key001的剩餘生存時間："+jedis.ttl("key001")); // 檢視key所儲存的值的型別 System.out.println("檢視key所儲存的值的型別："+jedis.type("key001")); /* * 一些其他方法：1、修改鍵名：jedis.rename("key6", "key0"); * 2、將當前db的key移動到給定的db當中：jedis.move("foo", 1) */ } /** * String功能 */ private void StringOperate() { System.out.println("======================String_1=========================="); // 清空資料 System.out.println("清空庫中所有資料："+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個鍵值對如下："); System.out.println(jedis.get("key001")); System.out.println(jedis.get("key002")); System.out.println(jedis.get("key003")); System.out.println("=============刪============="); System.out.println("刪除key003鍵值對："+jedis.del("key003")); System.out.println("獲取key003鍵對應的值："+jedis.get("key003")); System.out.println("=============改============="); //1、直接覆蓋原來的資料 System.out.println("直接覆蓋key001原來的資料："+jedis.set("key001","value001-update")); System.out.println("獲取key001對應的新值："+jedis.get("key001")); //2、直接覆蓋原來的資料 System.out.println("在key002原來值後面追加："+jedis.append("key002","+appendString")); System.out.println("獲取key002對應的新值"+jedis.get("key002")); System.out.println("=============增，刪，查（多個）============="); /** * mset,mget同時新增，修改，查詢多個鍵值對 * 等價於： * jedis.set("name","ssss"); * jedis.set("jarorwar","xxxx"); */ System.out.println("一次性新增key201,key202,key203,key204及其對應值："+jedis.mset("key201","value201", "key202","value202","key203","value203","key204","value204")); System.out.println("一次性獲取key201,key202,key203,key204各自對應的值："+ jedis.mget("key201","key202","key203","key204")); System.out.println("一次性刪除key201,key202："+jedis.del(new String[]{"key201", "key202"})); System.out.println("一次性獲取key201,key202,key203,key204各自對應的值："+ jedis.mget("key201","key202","key203","key204")); System.out.println(); //jedis具備的功能shardedJedis中也可直接使用，下面測試一些前面沒用過的方法 System.out.println("======================String_2=========================="); // 清空資料 System.out.println("清空庫中所有資料："+jedis.flushDB()); System.out.println("=============新增鍵值對時防止覆蓋原先值============="); System.out.println("原先key301不存在時，新增key301："+shardedJedis.setnx("key301", "value301")); System.out.println("原先key302不存在時，新增key302："+shardedJedis.setnx("key302", "value302")); System.out.println("當key302存在時，嘗試新增key302："+shardedJedis.setnx("key302", "value302_new")); System.out.println("獲取key301對應的值："+shardedJedis.get("key301")); System.out.println("獲取key302對應的值："+shardedJedis.get("key302")); System.out.println("=============超過有效期鍵值對被刪除============="); // 設定key的有效期，並存儲資料 System.out.println("新增key303，並指定過期時間為2秒"+shardedJedis.setex("key303", 2, "key303-2second")); System.out.println("獲取key303對應的值："+shardedJedis.get("key303")); try{ Thread.sleep(3000); } catch (InterruptedException e){ } System.out.println("3秒之後，獲取key303對應的值："+shardedJedis.get("key303")); System.out.println("=============獲取原值，更新為新值一步完成============="); System.out.println("key302原值："+shardedJedis.getSet("key302", "value302-after-getset")); System.out.println("key302新值："+shardedJedis.get("key302")); System.out.println("=============獲取子串============="); System.out.println("獲取key302對應值中的子串："+shardedJedis.getrange("key302", 5, 7)); } /** * List功能 */ private void ListOperate() { System.out.println("======================list=========================="); // 清空資料 System.out.println("清空庫中所有資料："+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("=============刪============="); // 刪除列表指定的值 ，第二個引數為刪除的個數（有重複時），後add進去的值先被刪，類似於出棧 System.out.println("成功刪除指定元素個數-stringlists："+shardedJedis.lrem("stringlists", 2, "vector")); System.out.println("刪除指定元素之後-stringlists："+shardedJedis.lrange("stringlists", 0, -1)); // 刪除區間以外的資料 System.out.println("刪除下標0-3區間之外的元素："+shardedJedis.ltrim("stringlists", 0, 3)); System.out.println("刪除指定區間之外元素後-stringlists："+shardedJedis.lrange("stringlists", 0, -1)); // 列表元素出棧 System.out.println("出棧元素："+shardedJedis.lpop("stringlists")); System.out.println("元素出棧後-stringlists："+shardedJedis.lrange("stringlists", 0, -1)); System.out.println("=============改============="); // 修改列表中指定下標的值 shardedJedis.lset("stringlists", 0, "hello list!"); System.out.println("下標為0的值修改後-stringlists："+shardedJedis.lrange("stringlists", 0, -1)); System.out.println("=============查============="); // 陣列長度 System.out.println("長度-stringlists："+shardedJedis.llen("stringlists")); System.out.println("長度-numberlists："+shardedJedis.llen("numberlists")); // 排序 /* * list中存字串時必須指定引數為alpha，如果不使用SortingParams，而是直接使用sort("list")， * 會出現"ERR One or more scores can't be converted into double" */ SortingParams sortingParameters = new SortingParams(); sortingParameters.alpha(); sortingParameters.limit(0, 3); System.out.println("返回排序後的結果-stringlists："+shardedJedis.sort("stringlists",sortingParameters)); System.out.println("返回排序後的結果-numberlists："+shardedJedis.sort("numberlists")); // 子串： start為元素下標，end也為元素下標；-1代表倒數一個元素，-2代表倒數第二個元素 System.out.println("子串-第二個開始到結束："+shardedJedis.lrange("stringlists", 1, -1)); // 獲取列表指定下標的值 System.out.println("獲取下標為2的元素："+shardedJedis.lindex("stringlists", 2)+"\n"); } /** * Set功能 */ private void SetOperate() { System.out.println("======================set=========================="); // 清空資料 System.out.println("清空庫中所有資料："+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("檢視sets集合中的所有元素:"+jedis.smembers("sets")); System.out.println(); System.out.println("=============刪============="); System.out.println("集合sets中刪除元素element003："+jedis.srem("sets", "element003")); System.out.println("檢視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棧："+jedis.spop("sets"));//注：出棧元素位置居然不定？--無實際意義 System.out.println("檢視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("判斷element001是否在集合sets中："+jedis.sismember("sets", "element001")); System.out.println("迴圈查詢獲取sets中的每個元素："); 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("=============集合運算============="); System.out.println("sets1中新增元素element001："+jedis.sadd("sets1", "element001")); System.out.println("sets1中新增元素element002："+jedis.sadd("sets1", "element002")); System.out.println("sets1中新增元素element003："+jedis.sadd("sets1", "element003")); System.out.println("sets1中新增元素element002："+jedis.sadd("sets2", "element002")); System.out.println("sets1中新增元素element003："+jedis.sadd("sets2", "element003")); System.out.println("sets1中新增元素element004："+jedis.sadd("sets2", "element004")); System.out.println("檢視sets1集合中的所有元素:"+jedis.smembers("sets1")); System.out.println("檢視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並集："+jedis.sunion("sets1", "sets2")); System.out.println("sets1和sets2差集："+jedis.sdiff("sets1", "sets2"));//差集：set1中有，set2中沒有的元素 } private void SortedSetOperate() { System.out.println("======================zset=========================="); // 清空資料 System.out.println(jedis.flushDB()); System.out.println("=============增============="); System.out.println("zset中新增元素element001："+shardedJedis.zadd("zset", 7.0, "element001")); System.out.println("zset中新增元素element002："+shardedJedis.zadd("zset", 8.0, "element002")); System.out.println("zset中新增元素element003："+shardedJedis.zadd("zset", 2.0, "element003")); System.out.println("zset中新增元素element004："+shardedJedis.zadd("zset", 3.0, "element004")); System.out.println("zset集合中的所有元素："+shardedJedis.zrange("zset", 0, -1));//按照權重值排序 System.out.println(); System.out.println("=============刪============="); System.out.println("zset中刪除元素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("統計zset集合中的元素中個數："+shardedJedis.zcard("zset")); System.out.println("統計zset集合中權重某個範圍內（1.0——5.0），元素的個數："+shardedJedis.zcount("zset", 1.0, 5.0)); System.out.println("檢視zset集合中element004的權重："+shardedJedis.zscore("zset", "element004")); System.out.println("檢視下標1到2範圍內的元素值："+shardedJedis.zrange("zset", 1, 2)); } private void HashOperate() { System.out.println("======================hash=========================="); //清空資料 System.out.println(jedis.flushDB()); System.out.println("=============增============="); System.out.println("hashs中新增key001和value001鍵值對："+shardedJedis.hset("hashs", "key001", "value001")); System.out.println("hashs中新增key002和value002鍵值對："+shardedJedis.hset("hashs", "key002", "value002")); System.out.println("hashs中新增key003和value003鍵值對："+shardedJedis.hset("hashs", "key003", "value003")); System.out.println("新增key004和4的整型鍵值對："+shardedJedis.hincrBy("hashs", "key004", 4l)); System.out.println("hashs中的所有值："+shardedJedis.hvals("hashs")); System.out.println(); System.out.println("=============刪============="); System.out.println("hashs中刪除key002鍵值對："+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整型鍵值的值增加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("判斷key003是否存在："+shardedJedis.hexists("hashs", "key003")); System.out.println("獲取key004對應的值："+shardedJedis.hget("hashs", "key004")); System.out.println("批量獲取key001和key003對應的值："+shardedJedis.hmget("hashs", "key001", "key003")); System.out.println("獲取hashs中所有的key："+shardedJedis.hkeys("hashs")); System.out.println("獲取hashs中所有的value："+shardedJedis.hvals("hashs")); System.out.println(); } /** * 測試 * @param args */ public static void main(String[] args) { new RedisTest().show(); } }