+ add select() to RedisOperations

spring-data-redis/src/main/java/org/springframework/data/keyvalue/redis/core/RedisOperations.java

@@ -87,6 +87,8 @@ public interface RedisOperations<K, V> {
 
 	K randomKey();
 
+	void select(int dbIndex);
+
 	void rename(K oldKey, K newKey);
 
 	Boolean renameIfAbsent(K oldKey, K newKey);

spring-data-redis/src/main/java/org/springframework/data/keyvalue/redis/core/RedisTemplate.java

@@ -574,6 +574,18 @@ public class RedisTemplate<K, V> extends RedisAccessor implements RedisOperation
 		}, true);
 	}
 
+
+	@Override
+	public void select(final int dbIndex) {
+		execute(new RedisCallback<Object>() {
+			@Override
+			public Object doInRedis(RedisConnection connection) {
+				connection.select(dbIndex);
+				return null;
+			}
+		}, true);
+	}
+
 	@Override
 	public K randomKey() {
 		byte[] rawKey = execute(new RedisCallback<byte[]>() {