java下载文件始终使用文件名" download“

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class FileDownloadServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String fileName = "download";
        String filePath = "/path/to/your/file"; // 替换为实际文件路径

        File file = new File(filePath);
        FileInputStream fis = new FileInputStream(file);
        BufferedInputStream bis = new BufferedInputStream(fis);

        ServletContext context = getServletContext();
        String mimeType = context.getMimeType(filePath);

        response.setContentType(mimeType);
        response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");

        ServletOutputStream os = response.getOutputStream();
        BufferedOutputStream bos = new BufferedOutputStream(os);

        byte[] buffer = new byte[4096];
        int bytesRead;
        while ((bytesRead = bis.read(buffer)) != -1) {
            bos.write(buffer, 0, bytesRead);
        }

        bos.flush();
        bis.close();
        bos.close();
    }
}