[代码优化](v2.5): 代码优化

close https://github.com/elunez/eladmin/issues/434

eladmin-common/src/main/java/me/zhengjie/utils/RedisUtils.java

@@ -15,6 +15,8 @@
  */
 package me.zhengjie.utils;
 
+import com.google.common.collect.Lists;
+import com.google.common.collect.Sets;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Value;
@@ -210,8 +212,10 @@ public class RedisUtils {
      * @return
      */
     public List<Object> multiGet(List<String> keys) {
-        Object obj = redisTemplate.opsForValue().multiGet(Collections.singleton(keys));
-        return null;
+        List list = redisTemplate.opsForValue().multiGet(Sets.newHashSet(keys));
+        List resultList = Lists.newArrayList();
+        Optional.ofNullable(list).ifPresent(e-> list.forEach(ele-> Optional.ofNullable(ele).ifPresent(resultList::add)));
+        return resultList;
     }
 
     /**