文件下载(解决中文文件名下载乱码问题)

文件下载页面:download.jsp

java 代码

<%@ page contentType="text/html;charset=utf-8" %>
<%@ page import = "java.util.*" %>
<%@ page import = "java.io.*" %>
<%@ page import = "java.net.*" %>
<%
//防止IE缓存
response.setHeader("pragma","no-cache");
response.setHeader("cache-control","no-cache");
response.setDateHeader("Expires",0);
//设置编码
request.setCharacterEncoding("UTF-8");

String fileName = request.getParameter("fileName");
//取到文件
File file = new File(application.getRealPath("/")+"upload/" + fileName);
response.reset();
response.setContentType("application/octet-stream;charset=UTF-8");
//System.out.println(response.getCharacterEncoding());
//一定要对fileName进行decode
response.addHeader("Content-Disposition", "attachment; filename=" + java.net.URLEncoder.encode(fileName, "UTF-8"));
response.setContentLength((int) file.length());

byte[] buffer = new byte[4096];
BufferedOutputStream output = null;
BufferedInputStream input = null;

// 写缓冲区：
try {
    output = new BufferedOutputStream(response.getOutputStream());
    input = new BufferedInputStream(new FileInputStream(file));

    int n = (-1);
    while ((n = input.read(buffer, 0, 4096)) > -1) {
        output.write(buffer, 0, n);
    }
    response.flushBuffer();
}
catch (Exception e) {
} // maybe user cancelled download
finally {
    if (input != null) input.close();
    if (output != null) output.close();
}
%>

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• 2007-04-14 15:41
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