+ add expireAt on RedisConnection

spring-data-redis/src/main/java/org/springframework/data/keyvalue/redis/connection/RedisCommands.java

@@ -44,6 +44,8 @@ public interface RedisCommands extends RedisTxCommands, RedisStringCommands, Red
 
 	Boolean expire(byte[] key, int seconds);
 
+	Boolean expireAt(byte[] key, long unixTime);
+
 	Boolean persist(byte[] key);
 
 	Integer ttl(byte[] key);

spring-data-redis/src/main/java/org/springframework/data/keyvalue/redis/connection/jedis/JedisConnection.java

@@ -190,6 +190,19 @@ public class JedisConnection implements RedisConnection {
 		}
 	}
 
+	@Override
+	public Boolean expireAt(byte[] key, long unixTime) {
+		try {
+			if (isQueueing()) {
+				transaction.expireAt(key, unixTime);
+				return null;
+			}
+			return (jedis.expireAt(key, unixTime) == 1);
+		} catch (Exception ex) {
+			throw convertJedisAccessException(ex);
+		}
+	}
+
 	@Override
 	public Collection<byte[]> keys(byte[] pattern) {
 		try {

spring-data-redis/src/main/java/org/springframework/data/keyvalue/redis/connection/jredis/JredisConnection.java

@@ -134,6 +134,15 @@ public class JredisConnection implements RedisConnection {
 		}
 	}
 
+	@Override
+	public Boolean expireAt(byte[] key, long unixTime) {
+		try {
+			return jredis.expireat(JredisUtils.convert(charset, key), unixTime);
+		} catch (RedisException ex) {
+			throw JredisUtils.convertJredisAccessException(ex);
+		}
+	}
+
 	@Override
 	public Collection<byte[]> keys(byte[] pattern) {
 		try {