如何在java servlet中获取上传的文件名？

import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
import java.io.IOException;

@WebServlet("/upload")
@MultipartConfig
public class UploadServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        Part filePart = request.getPart("file"); // "file"是上传文件的表单字段名
        String fileName = filePart.getSubmittedFileName();
        // 在这里可以对文件名进行处理或保存到数据库等操作
        response.getWriter().println("上传的文件名为：" + fileName);
    }
}