Servlet实现文件下载

最新推荐文章于 2022-04-14 13:30:36 发布

jimesum1

最新推荐文章于 2022-04-14 13:30:36 发布

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CC 4.0 BY-SA版权

文章标签： servlet jbuilder jsp download byte string

本文链接：https://blog.youkuaiyun.com/jimesum1/article/details/1909560

本文提供了一个使用Servlet和JSP实现文件下载功能的具体示例代码。通过设置HTTP响应头来触发浏览器的下载行为，并展示了如何读取文件内容并发送到客户端。

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servlet的(在doGet函数里实现)：
public void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException

{
String downloadFile = "C://boot.ini";
BufferedInputStream inputstream = new BufferedInputStream(new
FileInputStream(downloadFile));
response.reset();
response.setContentType("bin");
response.setContentType("application/octet-stream;name=/"boot.ini/"");
response.addHeader("Content-Disposition",
"attachment; filename=/"boot.ini/"");
response.setHeader("Accept-ranges", "bytes");
byte[] b = new byte[100];
int len;
while ( (len = inputstream.read(b)) > 0)

{
response.getOutputStream().write(b, 0, len);
}
inputstream.close();
}

jsp的（默认下载的内容就是当前页面）：

<%@ page contentType="text/html; charset=GBK" %>
<%
response.reset();
response.setContentType("bin");
response.setContentType("application/octet-stream;name=/"boot.ini/"");
response.addHeader("Content-Disposition","attachment; filename=/"boot.ini/"");
response.setHeader("Accept-ranges", "bytes");
%>
<html>
<head>
<title>
download
</title>
</head>
<body bgcolor="#ffffff">
<h1>
JBuilder Generated JSP
</h1>
</body>
</html>