下载文件中文变成了下划线

今天有个项目下载文件时发现文件名里的中文都变成了下划线（Firefox里是空格）

解决办法：针对不同浏览器对文件名进行不同格式的编码

/**
 * 下载文件
 * @param url
 * @param fileName
 * @param contentType
 * @param request
 * @param response
 * @throws IOException
 */
private void getFile(String url, String fileName, String contentType, HttpServletRequest request, HttpServletResponse response) throws IOException {
    ServletOutputStream out = null; // Servlet输出流
    FileInputStream ips = null; // 文件输入流
    try {
        File file = new File(url);
        if (file.exists()) {
            // 文件名编码
            if (request.getHeader("User-Agent").toUpperCase().indexOf("MSIE") > 0) {
                fileName = URLEncoder.encode(fileName, "UTF-8");
            } else {
                fileName = new String(fileName.getBytes("UTF-8"), "ISO8859-1");
            }
            // 设置响应头，控制浏览器下载该文件
            response.setContentType(contentType); // 描述消息内容类型
            response.setHeader("Content-Disposition", "attachment;fileName=" + fileName);
            response.setContentLengthLong(file.length());
            ips = new FileInputStream(file);
            out = response.getOutputStream();
            int len = 0;
            byte[] buffer = new byte[1024 * 10];
            while ((len = ips.read(buffer)) != -1) {
                out.write(buffer, 0, len);
            }
            out.flush();
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        out.close();
        ips.close();
    }
}

标签：中文,下划线,param,fileName,ips,new,response,下载,out
来源： https://www.cnblogs.com/sanrenblog/p/16220895.html