diff --git a/tools/json_example.py b/tools/json_example.py
new file mode 100644
index 0000000..3a9096c
--- /dev/null
+++ b/tools/json_example.py
@@ -0,0 +1,63 @@
+from pydantic import BaseModel, create_model
+from typing import Any, Dict, List, Optional, get_args, get_origin
+import json
+from datetime import datetime, date
+
+def generate_example_json(model: type[BaseModel]) -> str:
+    """
+    根据 Pydantic V2 模型生成示例 JSON 数据结构。
+    """
+
+    def _generate_example(field_type: Any) -> Any:
+        origin = get_origin(field_type)
+        args = get_args(field_type)
+
+        if origin is list or origin is List:
+            if args:
+                return [_generate_example(args[0])]
+            else:
+                return []
+        elif origin is dict or origin is Dict:
+            if len(args) == 2 and args[0] is str:
+                return {"key": _generate_example(args[1])}
+            else:
+                return {}
+        elif origin is Optional or origin is type(None):
+            if args:
+                return _generate_example(args[0])
+            else:
+                return None
+        elif field_type is str:
+            return "string"
+        elif field_type is int:
+            return 0
+        elif field_type is float:
+            return 0.0
+        elif field_type is bool:
+            return True
+        elif field_type is datetime:
+            return datetime.now().isoformat()
+        elif field_type is date:
+            return date.today().isoformat()
+        elif issubclass(field_type, BaseModel):
+            return generate_example_json(field_type)
+        else:
+            return "unknown"  # 对于未知类型返回 "unknown"
+
+    example_data = {}
+    for field_name, field in model.model_fields.items():
+        example_data[field_name] = _generate_example(field.annotation)
+
+    return json.dumps(example_data, indent=2, default=str)
+
+if __name__ == "__main__":
+    import sys
+    from pathlib import Path
+    # 添加项目根目录到sys.path
+    sys.path.append(str(Path(__file__).resolve().parent.parent))
+    from schema import Q_A
+    class Q_A_list(BaseModel):
+        Q_As: List[Q_A]
+
+    print("示例 JSON:")
+    print(generate_example_json(Q_A_list))