用流写出文件到前端代码示例

Posted 2023-06-18 Beyond The API

import java.io.*;
 public class FileDownloadServlet extends HttpServlet 
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
        String filename = "hello.docx";
        String filepath = "/path/to/your/file/" + filename;
        File file = new File(filepath);
        String contentType = getServletContext().getMimeType(file.getAbsolutePath());
        response.setContentType(contentType);
        response.setHeader("Content-Disposition", "attachment; filename=\\"" + filename + "\\"");
        InputStream inputStream = new FileInputStream(file);
        OutputStream outputStream = response.getOutputStream();
        byte[] buffer = new byte[4096];
        int bytesRead = -1;
        while ((bytesRead = inputStream.read(buffer)) != -1) 
            outputStream.write(buffer, 0, bytesRead);
        
        inputStream.close();
        outputStream.close();
    

本文来自博客园，作者：ukyo--BlackJesus，转载请注明原文链接：https://www.cnblogs.com/ukzq/p/17488608.html