这里是不是应该设置为 addPartToMultiPartBuilder(mpBuilder, param.getKey(), item); <img width="687" height="578" alt="Image" src="https://github.com/user-attachments/assets/d71685b4-8091-4faf-8d4d-d45250883ef9" />
这里是不是应该设置为 addPartToMultiPartBuilder(mpBuilder, param.getKey(), item);