JSP下载示例

最新推荐文章于 2024-12-26 11:11:09 发布

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#JSP下载示例

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<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.io.File"%>
<%@ page import="java.io.*"%>
<title>文档下载保存中转页面</title>
</head>
<body>
	<%
		String root = getServletContext().getRealPath("/"); //得到网站绝对路径
		//String filepath = "upload_file\\lwfile\\";                        //设置文件存放的相对路径(windows)
		String filepath = "upload_file/lwfile/"; //设置文件存放的相对路径(linux)
		String fileName = request.getParameter("filename"); //得到文件名
		String myName = "中文文档下载.doc"; //文件改名

		out.print(root + filepath + fileName);

		// 设置响应头和下载保存的文件名
		response.reset();
		//response.setContentType("application/octet-stream");       //windows
		//response.addHeader("Content-Disposition", "filename=\"" + myName + "\"");      //windows
		response.setContentType("application/octet-stream; charset=GBK"); //linux

		response.addHeader("Content-Disposition", "attachment; filename=\"" + new String(myName.getBytes("gb2312"), "iso8859-1") + "\""); //linux

		//新建文件输入输出流
		OutputStream output = null;
		FileInputStream fis = null;
		try {
			//新建File对象
			File f = new File(root + filepath + fileName);
			//新建文件输入输出流对象
			output = response.getOutputStream();
			fis = new FileInputStream(f);
			//设置每次写入缓存大小
			byte[] b = new byte[(int) f.length()];
			//out.print(f.length());
			//把输出流写入客户端
			int i = 0;
			while ((i = fis.read(b)) > 0) {
				output.write(b, 0, i);
			}
			output.flush();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (fis != null) {
				fis.close();
				fis = null;
			}
			if (output != null) {
				output.close();
				output = null;
			}
		}
	%>
</body>
</html>