diff --git a/hutool-core/src/test/java/cn/hutool/core/lang/tree/TreeConvertTest.java b/hutool-core/src/test/java/cn/hutool/core/lang/tree/TreeConvertTest.java
index 8dce50835..602598ca8 100644
--- a/hutool-core/src/test/java/cn/hutool/core/lang/tree/TreeConvertTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/lang/tree/TreeConvertTest.java
@@ -11,7 +11,8 @@ import java.util.List;
  * 树转换测试
  */
 public class TreeConvertTest {
-
+    //
+    private static final String ROOT = "0";
     // 子父级测试数据
     private List<Dept> parentChildMaterials = Arrays.asList(
             new Dept("00000001", "0", "xxx公司"),
@@ -38,12 +39,22 @@ public class TreeConvertTest {
     @Test
     public void testParentChild() {
         List<Dept> tree = TreeConvert.convert(parentChildMaterials, Dept.class,
-                root -> "0".equals(root.getParentId()),
+                // TreeConvertTest::rootDecide
+                root -> ROOT.equals(root.getParentId()),
+                // TreeConvertTest::leafDecide
                 (root, leaf) -> leaf.getParentId().equals(root.getDeptId())
         );
-        Assert.assertEquals("0", tree.get(0).getParentId());
+        Assert.assertEquals(ROOT, tree.get(0).getParentId());
     }
 
+    // 静态抽象
+    public static boolean rootDecide(Dept root) {
+        return ROOT.equals(root.getDeptId());
+    }
+    // 静态抽象
+    public static boolean leafDecide(Dept root, Dept leaf) {
+        return leaf.getParentId().equals(root.getDeptId());
+    }
     // 排序号测试
     @Test
     public void testSortNo() {
@@ -54,7 +65,7 @@ public class TreeConvertTest {
                         !leaf.getSortNo().equals(root.getSortNo()) &&
                         leaf.getSortNo().length() - root.getSortNo().length() == 2
         );
-        Assert.assertEquals("0", tree.get(0).getParentId());
+        Assert.assertEquals("00", tree.get(0).getSortNo());
     }
 
     // 测试实体类