忘记从哪篇博文借鉴的了，博主看到的话可以联系我进行转载或者删除。然后自己修复了原有代码的BUG，已验证各个浏览器文件下载中文没有乱码

/**
 * 解决各个浏览器文件下载中文乱码问题
 * @param filename
 * @return
 */
public static String getFileName(HttpServletRequest request, String filename) {
    String finalFileName = "";
    try {
        final String userAgent = request.getHeader("USER-AGENT");
        if (StringUtils.contains(userAgent, "Edge")) {
            finalFileName = URLEncoder.encode(filename, "UTF8");
        } else if (StringUtils.contains(userAgent, "MSIE") || StringUtils.contains(userAgent, "Trident")) {
            // IE浏览器
            finalFileName = URLEncoder.encode(filename, "UTF8");
        } else if (StringUtils.contains(userAgent, "Mozilla")) {
            // google,火狐浏览器
            finalFileName = new String(filename.getBytes(), "ISO8859-1");
        } else {
            //其他浏览器
            finalFileName = URLEncoder.encode(filename, "UTF8");
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return finalFileName;
}