import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class FileDownloadServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
    private static final String FILE_PATH = "/path/to/your/file.ext"; // 文件的绝对路径

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        File file = new File(FILE_PATH);

        if (file.exists()) {
            response.setContentType("application/octet-stream");
            response.setHeader("Content-Disposition", "attachment; filename=\"" + file.getName() + "\"");
            response.setContentLength((int) file.length());

            FileInputStream fis = new FileInputStream(file);
            byte[] buffer = new byte[1024];
            int bytesRead;

            while ((bytesRead = fis.read(buffer)) != -1) {
                response.getOutputStream().write(buffer, 0, bytesRead);
            }

            fis.close();
            response.getOutputStream().flush();
        } else {
            response.getWriter().println("File not found.");
        }
    }
}

谢谢，这个是chatgpt给出的、用HttpServletResponse 实现的 下载代码。可是这样写以后，供前端下载的请求url 是什么呢？谢谢
【 在 CHNSTAR 的大作中提到: 】
: 不用Spring框架提供的封装类
: 直接用原始的Servlet API
: 反正Spring最后调用的还是HttpServletResponse
: ...................
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FROM 120.242.238.*