Redis Learning Note (5)-set

Package Cn.com;import Java.util.hashmap;import Java.util.map;import java.util.set;import Redis.clients.jedis.Jedis /** * All operation Methods of the collection * * */public class Redis_set {public static Jedis Redis = new Jedis ("localhost", 6379);//Connection Redispublic static void Zadd () {map<string,double> map=new hashmap<string,double> (); Redis.zadd ("User", Map);} /** * Adding one or more elements to the collection key, the member element that already exists in the collection is ignored. * */public static void Sadd () {redis.flushdb ();//Clear Data Redis.sadd ("User", "a", "B", "C", "D", "E", "F"); Set<string> setlist=redis.smembers ("user"); for (String s:setlist) {System.out.println (s);}} /** * SCard Key * Returns the cardinality of the collection key (the number of elements in the collection) * */public static void SCard () {redis.flushdb ();//Clear Data Redis.sadd ("User", "a", "B", " C "," D "," E "," F "); Long number=redis.scard ("user"); SYSTEM.OUT.PRINTLN (number);} /** * Sdiff key [key ...] differential set * Returns all members of a collection, which is a set of differences between all given sets. * A nonexistent key is considered an empty set. * Equivalent month user minus user1 remaining user element * */public static void Sdiff () {redis.flushdb ();//Clear Data Redis.sadd ("User", "a", "B", "C", "Z"); Redis.sadd ("User1"A", "C", "D", "F"); Set<string> Setlist=redis.sdiff ("User", "user1"); for (String s:setlist) {System.out.println (s);}} /** * Sdiffstore destination key [key ...] The difference set puts the result into a new union * This command functions like Sdiff, but it saves the result to the destination collection instead of simply returning the result set. * If the destination collection already exists, overwrite it. * Destination can be the key itself. * N is the sum of the number of members for all given sets. * Example: The following example is to remove an element that is not contained in the user in the User1 (ZZZ) does not exist in the User1 * */public static void Sdiffstore () {redis.flushdb ();//Clear Data Redis.sadd ("User", "a", "B", "C", "zzzz"); Redis.sadd ("User1", "a", "B", "C", "D", "E", "F"); Long Size=redis.sdiffstore ("NewUser", "User", "user1"); SYSTEM.OUT.PRINTLN ("Size:" +size); Set<string> setlist=redis.smembers ("NewUser"); for (String s:setlist) {System.out.println (s);}} /** * SINTER key [key ...] asks for intersection * Returns all members of a collection, which is the intersection of all given collections. * A nonexistent key is considered an empty set. * When there is an empty set in a given collection, the result is also an empty set (according to the Law of collection Operations). * */public static void Sinter () {redis.flushdb ();//Clear Data Redis.sadd ("User", "a", "B", "C", "zzzz"), Redis.sadd ("user1", "a" , "B", "C", "D", "E", "F"); Set<string> setlist=redis.sinter ("User", "user1");(String s:setlist) {System.out.println (s);}} /** * SINTER key [key ...] the difference between the intersection and the SINTER is that the result set of the difference is placed in the new array as follows: NewUser * Returns all members of a collection, which is the intersection of all given collections. * A nonexistent key is considered an empty set. * When there is an empty set in a given collection, the result is also an empty set (according to the Law of collection Operations). * */public static void Sinterstore () {redis.flushdb ();//Clear Data Redis.sadd ("User", "a", "B", "C", "zzzz"); Redis.sadd ("User1 "A", "B", "C", "D", "E", "F"), long Size=redis.sinterstore ("NewUser", "User", "user1"); System.out.println ("The size of the intersection:" +size); Set<string> setlist=redis.smembers ("NewUser"); for (String s:setlist) {System.out.println (s);}} /** * sunion key [key ...] returns all members of a collection, which is the set of all the given collections. * A nonexistent key is considered an empty set. * */public static void Sunion () {redis.flushdb ();//Clear Data Redis.sadd ("User", "a", "B", "C", "zzzz"), Redis.sadd ("user1", "a" , "B", "C", "D", "E", "F"); Set<string> setlist=redis.sunion ("User", "user1"); for (String s:setlist) {System.out.println (s);}}  /** * sunion key [key ...] Putting the union of two sets into a new Union NewUser * Returns all members of a collection, which is the Union of all given collections. * A nonexistent key is considered an empty set. * */public static void Sunionstore () {redis.flushdb ();//Clear Data Redis. Sadd ("User", "a", "B", "C", "zzzz"); Redis.sadd ("User1", "a", "B", "C", "D", "E", "F"); long L=redis.sunionstore ("NewUser" , "User", "user1"); Set<string> setlist=redis.smembers ("NewUser"); for (String s:setlist) {System.out.println (s);}} /** * Sismember Key member * Determines whether the member element is a member of the collection key. * */public static void Sismember () {redis.flushdb ();//Clear Data Redis.sadd ("User", "a", "B", "C", "zzzz"); Boolean b= Redis.sismember ("User", "a"); Boolean b1=redis.sismember ("User", "no Oh"); System.out.println ("returns a true and false"); System.out.println (b); System.out.println (B1);} /** * Gets the collection Object * */public static void Smembers () {redis.flushdb ();//Clear Data Redis.sadd ("User", "a", "B", "C", "D", "E", "F"); Set<string> setlist=redis.smembers ("user"); for (String s:setlist) {System.out.println (s);}} /** * Smove Source Destination Member * Smove is an atomic operation. * @param srckey Source Collection key * @param dstkey Target Collection key * @param member element to move * Move element member in source collection to target collection * return value: * If the member element is successful     removed, returns 1. * If the member element is not a member of the source collection and there is no action on the destination collectionLine, then return 0. */public static void Smove () {redis.flushdb ();//Clear Data Redis.sadd ("User", "a", "B", "C", "zzzz"), Redis.sadd ("user1", "D", " E "," F "); Redis.smove (" User "," user1 "," zzzz "); System.out.println ("The remaining elements of ======user should be a,b,c======"); Set<string> setlist=redis.smembers ("user"); for (String s:setlist) {System.out.println (s);} SYSTEM.OUT.PRINTLN ("The element of ======user 1 should be d,e,f,zzz======"); Set<string> setlist1=redis.smembers ("user1"); for (String S:setlist1) {System.out.println (s);}} /** * SPOP Key * Removes and returns a random element in the collection. * You can use the Srandmember command if you want to get only a random element but don't want the element to be removed from the collection. * */public static void Spop () {redis.flushdb ();//Clear Data Redis.sadd ("User", "1", "2", "3", "4", "5", "6", "7"); String s=redis.spop ("user"); SYSTEM.OUT.PRINTLN ("randomly popping and removing elements:" +s); Set<string> setlist=redis.smembers ("user"); for (String str:setlist) {System.out.println (str);}} /** * If the command executes, only the key parameter is supplied, then a random element in the collection is returned. * */public static void Srandmember () {redis.flushdb ();//Clear Data Redis.sadd ("User", "1", "2", "3", "4", "5", "6", "7"); String S=redis.srandmember ("User"); System.out.println ("Random popup element Not removed:" +s); Set<string> setlist=redis.smembers ("user"); for (String str:setlist) {System.out.println (str);}} /** * Srem Key member [member ...] * removes one or more member elements from the collection key, and the nonexistent member element is ignored. * When key is not a collection type, an error is returned. * */public static void Srem () {redis.flushdb ();//Clear Data Redis.sadd ("User", "1", "2", "3", "4", "5", "6", "7"); Redis.srem (" User "," 1 "," 3 "," 5 ");//delete 1,3,5set<string> setlist=redis.smembers (" user "); for (String str:setlist) { System.out.println (str);}} public static void Main (String [] args) {Sunionstore ();}}

　　

Redis Learning Note (5)-set