diff --git a/include/utils/string_ext.h b/include/utils/string_ext.h
index 6f6df2e..62a8a45 100644
--- a/include/utils/string_ext.h
+++ b/include/utils/string_ext.h
@@ -30,4 +30,8 @@ char *stristr(const char *haystack, const char *needle);
 // 检查字符串列表中是否存在指定路径（不区分大小写）
 int string_list_contains(const StringList *list, const char *str);
 
+// 展开环境变量（如 %JAVA_HOME%\bin → C:\Java\bin）
+// 返回 malloc 分配的字符串，调用者负责释放；无变量返回 NULL
+char *expand_env_vars(const char *path);
+
 #endif // STRING_EXT_H
diff --git a/src/ui/ui_utils.c b/src/ui/ui_utils.c
index 8ec9dfc..91a13c9 100644
--- a/src/ui/ui_utils.c
+++ b/src/ui/ui_utils.c
@@ -1,7 +1,9 @@
 #include "ui/ui_utils.h"
 #include "utils/os_env.h"
+#include "utils/string_ext.h"
 #include <stdio.h>
 #include <string.h>
+#include <stdlib.h>
 
 // 刷新列表样式（斑马纹 + 有效性检查）
 void refresh_single_list_style(Ihandle *list)
@@ -61,7 +63,19 @@ void sync_string_list_to_ui(Ihandle *list_ui, const StringList *str_list)
     
     for (int i = 0; i < str_list->count; i++)
     {
-        IupSetAttributeId(list_ui, "", i + 1, string_list_get(str_list, i));
+        const char *item = string_list_get(str_list, i);
+        IupSetAttributeId(list_ui, "", i + 1, item);
+
+        // 对含环境变量的路径设置悬停提示
+        if (item && strchr(item, '%'))
+        {
+            char *expanded = expand_env_vars(item);
+            if (expanded)
+            {
+                IupSetAttributeId(list_ui, "ITEMTIP", i + 1, expanded);
+                free(expanded);
+            }
+        }
     }
     IupSetInt(list_ui, "COUNT", str_list->count);
     
diff --git a/src/utils/string_ext.c b/src/utils/string_ext.c
index fd8a096..7065f5e 100644
--- a/src/utils/string_ext.c
+++ b/src/utils/string_ext.c
@@ -139,4 +139,27 @@ int string_list_contains(const StringList *list, const char *str)
             return 1;
     }
     return 0;
+}
+
+// 展开环境变量（如 %JAVA_HOME%\bin → C:\Java\bin）
+char *expand_env_vars(const char *path)
+{
+    if (!path || !strchr(path, '%'))
+        return NULL;
+
+    DWORD size = ExpandEnvironmentStringsA(path, NULL, 0);
+    if (size == 0)
+        return NULL;
+
+    char *expanded = (char *)malloc(size);
+    if (!expanded)
+        return NULL;
+
+    if (ExpandEnvironmentStringsA(path, expanded, size) == 0)
+    {
+        free(expanded);
+        return NULL;
+    }
+
+    return expanded;
 }
\ No newline at end of file