diff --git a/hutool-core/src/main/java/cn/hutool/core/annotation/LeafCollection.java b/hutool-core/src/main/java/cn/hutool/core/annotation/LeafCollection.java
index a05852149..3d3bfe146 100644
--- a/hutool-core/src/main/java/cn/hutool/core/annotation/LeafCollection.java
+++ b/hutool-core/src/main/java/cn/hutool/core/annotation/LeafCollection.java
@@ -1,6 +1,10 @@
 package cn.hutool.core.annotation;
 
-import java.lang.annotation.*;
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+import java.lang.annotation.RetentionPolicy;
 
 /**
  * 叶容器-当对象存在树型结构,通过此注解标注属性告知存储位置
diff --git a/hutool-core/src/main/java/cn/hutool/core/lang/tree/TreeConvert.java b/hutool-core/src/main/java/cn/hutool/core/lang/tree/TreeConvert.java
index d50dfb21c..d45f4661b 100644
--- a/hutool-core/src/main/java/cn/hutool/core/lang/tree/TreeConvert.java
+++ b/hutool-core/src/main/java/cn/hutool/core/lang/tree/TreeConvert.java
@@ -10,7 +10,9 @@ import java.beans.IntrospectionException;
 import java.beans.PropertyDescriptor;
 import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
-import java.util.*;
+import java.util.List;
+import java.util.Collection;
+import java.util.ArrayList;
 
 /**
  * 树结构转换工具
@@ -26,6 +28,13 @@ import java.util.*;
  */
 public class TreeConvert {
 
+    /**
+     * 构造私有化，静态方法不需要暴露公共构造器
+     * 修复 <code>Add a private constructor to hide the implicit public one</code>
+     */
+    private TreeConvert() {
+
+    }
     /**
      * 生成树结构
      * 通过反射检测LeafCollection注解,转换为父子结构容器,子数据装入LeafCollection容器中
@@ -87,8 +96,11 @@ public class TreeConvert {
      * @throws IntrospectionException    e
      * @throws InvocationTargetException e
      * @throws IllegalAccessException    e
+     *
+     * 2020-08-26 修复方法名过长
      */
-    private static <T> List<T> sort(T root, Collection<T> elements, LeafDecide<T> leafDecide, Class<?> clazz, Field leafField) throws IntrospectionException, InvocationTargetException, IllegalAccessException {
+    private static <T> List<T> sort(T root, Collection<T> elements, LeafDecide<T> leafDecide, Class<?> clazz, Field leafField)
+            throws IntrospectionException, InvocationTargetException, IllegalAccessException {
         List<T> subMenu = null;
         for (T element : elements) {
             if (leafDecide.isLeaf(root, element)) {