* Redis（七）：JedisCluster 操作API
阿新 • • 發佈：2018-12-25
package com.redis; import org.junit.Test; import redis.clients.jedis.HostAndPort; import redis.clients.jedis.JedisCluster; import redis.clients.jedis.JedisPoolConfig; import redis.clients.jedis.SortingParams; import java.util.HashMap; import java.util.HashSet; import java.util.Map; import java.util.Set; import java.util.concurrent.TimeUnit; /** * 叢集環境下Jedis操作 */ public class Cluster { private static JedisCluster jedis; static { // 新增叢集的服務節點Set集合 Set<HostAndPort> hostAndPortsSet = new HashSet<HostAndPort>(); // 新增節點 hostAndPortsSet.add(new HostAndPort("192.168.56.180", 7777)); hostAndPortsSet.add(new HostAndPort("192.168.56.180", 8888)); hostAndPortsSet.add(new HostAndPort("192.168.56.181", 7777)); hostAndPortsSet.add(new HostAndPort("192.168.56.181", 8888)); hostAndPortsSet.add(new HostAndPort("192.168.56.182", 7777)); hostAndPortsSet.add(new HostAndPort("192.168.56.182", 8888)); // Jedis連線池配置 JedisPoolConfig jedisPoolConfig = new JedisPoolConfig(); // 最大空閒連線數, 預設8個 jedisPoolConfig.setMaxIdle(100); // 最大連線數, 預設8個 jedisPoolConfig.setMaxTotal(500); //最小空閒連線數, 預設0 jedisPoolConfig.setMinIdle(0); // 獲取連線時的最大等待毫秒數(如果設定為阻塞時BlockWhenExhausted),如果超時就拋異常, 小於零:阻塞不確定的時間, 預設-1 jedisPoolConfig.setMaxWaitMillis(2000); // 設定2秒 //對拿到的connection進行validateObject校驗 jedisPoolConfig.setTestOnBorrow(true); jedis = new JedisCluster(hostAndPortsSet, jedisPoolConfig); } /** * 測試key:value資料 * 叢集中flushDB、keys廢棄 */ @Test public void testKey() throws InterruptedException { //System.out.println("清空資料："+jedis.flushDB()); System.out.println("判斷某個鍵是否存在："+jedis.exists("username")); System.out.println("新增<'username','wukong'>的鍵值對："+jedis.set("username", "xiaohai")); System.out.println("是否存在:"+jedis.exists("username")); System.out.println("新增<'password','password'>的鍵值對："+jedis.set("password", "123456")); //Set<String> keys = jedis.keys("*"); // System.out.println("系統中所有的鍵如下："+keys); System.out.println("刪除鍵password:"+jedis.del("password")); System.out.println("判斷鍵password是否存在："+jedis.exists("password")); System.out.println("設定鍵username的過期時間為10s:"+jedis.expire("username", 10)); TimeUnit.SECONDS.sleep(2); // 執行緒睡眠2秒System.out.println("檢視鍵username的剩餘生存時間："+jedis.ttl("username")); System.out.println("檢視鍵username的剩餘生存時間："+jedis.ttl("username")); System.out.println("移除鍵username的生存時間："+jedis.persist("username")); System.out.println("檢視鍵username的剩餘生存時間："+jedis.ttl("username")); System.out.println("檢視鍵username所儲存的值的型別："+jedis.type("username")); } /*** * 字串操作 * memcached和redis同樣有append的操作，但是memcached有prepend的操作，redis中並沒有。 * 叢集中flushDB、keys、del(多個值)、mset(多個值)廢棄 * @throws InterruptedException */ @Test public void testString() throws InterruptedException { //jedis.flushDB(); System.out.println("===========增加資料==========="); System.out.println(jedis.set("key1","value1")); System.out.println(jedis.set("key2","value2")); System.out.println(jedis.set("key3", "value3")); System.out.println("刪除鍵key2:"+jedis.del("key2")); System.out.println("獲取鍵key2:"+jedis.get("key2")); System.out.println("修改key1:"+jedis.set("key1", "value1Changed")); System.out.println("獲取key1的值："+jedis.get("key1")); System.out.println("在key3後面加入值："+jedis.append("key3", "End")); System.out.println("key3的值："+jedis.get("key3")); //命令的時候才會去連線連線，叢集中連線是對一個節點連線，不能判斷多個key經過crc16演算法所對應的槽在一個節點上，不支援多key獲取、刪除 //System.out.println("增加多個鍵值對："+jedis.mset("key01","value01","key02","value02")); //System.out.println("獲取多個鍵值對："+jedis.mget("key01","key02","key03")); //System.out.println("獲取多個鍵值對："+jedis.mget("key01","key02","key03","key04")); //System.out.println("刪除多個鍵值對："+jedis.del(new String[]{"key01","key02"})); //System.out.println("獲取多個鍵值對："+jedis.mget("key01","key02","key03")); //jedis.flushDB(); System.out.println("===========新增鍵值對防止覆蓋原先值=============="); 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("===========新增鍵值對並設定有效時間============="); 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("===========獲取原值，更新為新值==========");//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("獲得key2的值的字串："+jedis.getrange("key2", 2, 4)); // 相當擷取字串的第二個位置-第四個位置的字串 } /*** * 整數和浮點數 */ @Test public void testNumber() { 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("獲取key1的值："+jedis.get("key1")); System.out.println("key2的值減1："+jedis.decr("key2")); System.out.println("獲取key2的值："+jedis.get("key2")); System.out.println("將key1的值加上整數5："+jedis.incrBy("key1", 5)); System.out.println("獲取key1的值："+jedis.get("key1")); System.out.println("將key2的值減去整數5："+jedis.decrBy("key2", 5)); System.out.println("獲取key2的值："+jedis.get("key2")); System.out.println("key3的值："+jedis.get("key3")); // 這裡會報錯，因為key3不是整數不能做計算:redis.clients.jedis.exceptions.JedisDataException: ERR value is not an integer or out of range // System.out.println("key2的值減1："+jedis.decr("key3")); } /*** * 列表 */ @Test public void testList() { System.out.println("===========新增一個list==========="); jedis.lpush("collections", "ArrayList", "Vector", "Stack", "HashMap", "WeakHashMap", "LinkedHashMap"); jedis.lpush("collections", "HashSet"); // 疊加 jedis.lpush("collections", "TreeSet"); // 疊加 jedis.lpush("collections", "TreeMap"); // 疊加 System.out.println("collections的內容："+jedis.lrange("collections", 0, -1));//-1代表倒數第一個元素，-2代表倒數第二個元素 System.out.println("collections區間0-3的元素："+jedis.lrange("collections",0,3)); // 前面4個值 System.out.println("==============================="); // 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("刪除指定元素個數："+jedis.lrem("collections", 2, "HashMap")); System.out.println("collections的內容："+jedis.lrange("collections", 0, -1)); System.out.println("刪除下表0-3區間之外的元素："+jedis.ltrim("collections", 0, 3)); System.out.println("collections的內容："+jedis.lrange("collections", 0, -1)); System.out.println("collections列表出棧（左端）："+jedis.lpop("collections")); System.out.println("collections的內容："+jedis.lrange("collections", 0, -1)); System.out.println("collections新增元素，從列表右端，與lpush相對應："+jedis.rpush("collections", "EnumMap")); System.out.println("collections的內容："+jedis.lrange("collections", 0, -1)); System.out.println("collections列表出棧（右端）："+jedis.rpop("collections")); System.out.println("collections的內容："+jedis.lrange("collections", 0, -1)); System.out.println("修改collections指定下標1的內容："+jedis.lset("collections", 1, "LinkedArrayList")); System.out.println("collections的內容："+jedis.lrange("collections", 0, -1)); System.out.println("==============================="); System.out.println("collections的長度："+jedis.llen("collections")); System.out.println("獲取collections下標為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排序後："+jedis.lrange("sortedList", 0, -1)); } /*** * set集合 */ @Test public void testSet() { System.out.println("============向集合中新增元素============"); 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")); // 返回0，集合中已經存在 System.out.println("eleSet的所有元素為："+jedis.smembers("eleSet")); System.out.println("刪除一個元素e0："+jedis.srem("eleSet", "e0")); System.out.println("eleSet的所有元素為："+jedis.smembers("eleSet")); System.out.println("刪除兩個元素e7和e6："+jedis.srem("eleSet", "e7","e6")); System.out.println("eleSet的所有元素為："+jedis.smembers("eleSet")); System.out.println("隨機的移除集合中的一個元素："+jedis.spop("eleSet")); System.out.println("隨機的移除集合中的一個元素："+jedis.spop("eleSet")); System.out.println("eleSet的所有元素為："+jedis.smembers("eleSet")); System.out.println("eleSet中包含元素的個數："+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("e5是否在eleSet中："+jedis.sismember("eleSet", "e5")); // 叢集下並存會報錯：redis.clients.jedis.exceptions.JedisClusterException: No way to dispatch this command to Redis Cluster because keys have different slots. // Redis叢集，從key1集合與key2集合並存、交集、差集，兩個鍵經過crc16演算法可能有不同的槽。 /*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("將eleSet1中刪除e1並存入eleSet3中："+jedis.smove("eleSet1", "eleSet3", "e1")); System.out.println("將eleSet1中刪除e2並存入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("============集合運算================="); 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的並集:"+jedis.sunion("eleSet1","eleSet2")); System.out.println("eleSet1和eleSet2的差集:"+jedis.sdiff("eleSet1","eleSet2"));*/ jedis.del("eleSet"); jedis.del("eleSet1"); jedis.del("eleSet2"); jedis.del("eleSet3"); } /*** * 雜湊 */ @Test public void testHash() { Map<String,String> map = new HashMap<String,String>(); 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("雜湊hash的所有鍵值對為："+jedis.hgetAll("hash"));//return Map<String,String> System.out.println("雜湊hash的所有鍵為："+jedis.hkeys("hash"));//return Set<String> System.out.println("雜湊hash的所有值為："+jedis.hvals("hash"));//return List<String> System.out.println("將key6儲存的值加上一個整數，如果key6不存在則新增key6："+jedis.hincrBy("hash", "key6", 6)); System.out.println("雜湊hash的所有鍵值對為："+jedis.hgetAll("hash")); System.out.println("將key6儲存的值加上一個整數，如果key6不存在則新增key6："+jedis.hincrBy("hash", "key6", 3)); System.out.println("雜湊hash的所有鍵值對為："+jedis.hgetAll("hash")); System.out.println("刪除一個或者多個鍵值對："+jedis.hdel("hash", "key2")); System.out.println("雜湊hash的所有鍵值對為："+jedis.hgetAll("hash")); System.out.println("雜湊hash中鍵值對的個數："+jedis.hlen("hash")); System.out.println("判斷hash中是否存在key2："+jedis.hexists("hash","key2")); System.out.println("判斷hash中是否存在key3："+jedis.hexists("hash","key3")); System.out.println("獲取hash中的值："+jedis.hmget("hash","key3")); System.out.println("獲取hash中的值："+jedis.hmget("hash","key3","key4")); } /** * 有序集合 */ @Test public void testSortedSet() { Map<String,Double> map = new HashMap<String,Double>(); map.put("key2",1.2); map.put("key3",4.0); map.put("key4",5.0); map.put("key5",0.2); // 將一個或多個 member 元素及其 score 值加入到有序集 key 當中，如果某個 member 已經是有序集的成員，那麼更新這個 member 的 score 值 // score 值可以是整數值或雙精度浮點數 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("刪除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中元素的個數："+jedis.zcard("zset")); System.out.println("zset中分值在1-4之間的元素的個數："+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)); } /** * 排序 */ @Test public void testSort() { jedis.lpush("collections", "ArrayList", "Vector", "Stack", "HashMap", "WeakHashMap", "LinkedHashMap"); System.out.println("collections的內容："+jedis.lrange("collections", 0, -1)); SortingParams sortingParameters = new SortingParams(); // 當資料集中儲存的是字串值時，你可以用 ALPHA,預設是升序 System.out.println("alpha排序方式：" + 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("降序："+jedis.sort("sortedList", sortingParameters.desc())); System.out.println("==============================="); // 叢集下不支援分割表排序 /*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(); // 符號 "->" 用於分割雜湊表的鍵名(key name)和索引域(hash field)，格式為 "key->field" sortingParameters.get("user:*->name"); sortingParameters.get("user:*->add"); System.out.println(jedis.sort("userlist",sortingParameters));*/ } }