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JSP下载示例

2014-02-10 11:20 211 查看

<%@ 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>

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