修复bug

yzg-util-base/src/main/java/com/yanzuoguang/util/helper/ArrayHelper.java

@@ -20,10 +20,12 @@ public class ArrayHelper {
      */
     public static <T extends Object> List<T> megerNotEmpty(T from, Collection<T>... froms) {
         List<T> tos = new ArrayList<>();
-        if (!StringHelper.isEmpty(from)) {
+        if (from != null && !StringHelper.isEmpty(from)) {
             tos.add(from);
         }
-        if (froms != null) {
+        if (froms == null) {
+            return tos;
+        }
         for (Collection<T> list : froms) {
             for (T item : list) {
                 if (!StringHelper.isEmpty(item)) {
@@ -31,7 +33,6 @@ public class ArrayHelper {
                 }
             }
         }
-        }
         return tos;
     }