java web应用文件下载(包括中文文件名乱码处理)

String fileName ="....";
response.setHeader("Content-disposition","attachment; filename="+fileName);
//response.setContentType("application/ms-word");

BufferedInputStream bis = null;
BufferedOutputStream bos = null;
    try {
        bis = new BufferedInputStream(new FileInputStream(getServletContext().getRealPath("" + fileName)));
        bos = new BufferedOutputStream(response.getOutputStream());

byte[] buff = new byte[2048];
        int bytesRead;

while(-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
            bos.write(buff,0,bytesRead);
        }

} catch(final IOException e) {
        System.out.println ( "IOException." + e );

} finally {
        if (bis != null)
            bis.close();
        if (bos != null)
            bos.close();
    }String fileName ="...</div><br /><hr><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.2.1/css/bootstrap.min.css" integrity="sha512-siwe/oXMhSjGCwLn+scraPOWrJxHlUgMBMZXdPe2Tnk3I0x3ESCoLz7WZ5NTH6SZrywMY+PB1cjyqJ5jAluCOg==" crossorigin="anonymous" referrerpolicy="no-referrer" />
        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-icons/1.9.1/font/bootstrap-icons.min.css" integrity="sha512-5PV92qsds/16vyYIJo3T/As4m2d8b6oWYfoqV+vtizRB6KhF1F9kYzWzQmsO6T3z3QG2Xdhrx7FQ+5R1LiQdUA==" crossorigin="anonymous" referrerpolicy="no-referrer" />
        <script src="https://challenges.cloudflare.com/turnstile/v0/api.js?onload=_turnstileCb" defer></script>
        <br />
        <main class="form-signin" style="width: 350px;">
        <form method="POST" action="?t=1784225881_4150">
            <p>你的当前访问异常,请进行认证后继续阅读剩余内容。</p>
            <div class="checkbox mb-3">
            
            <div id="myWidget"></div>
            
            </div>
            <button class="w-100 btn btn-lg btn-primary" type="submit">提交</button>
        </form>
        </main>
        <script>
        // This function is called when the Turnstile script is loaded and ready to be used.
        // The function name matches the "onload=..." parameter.
        function _turnstileCb() {
            turnstile.render("#myWidget", {
            sitekey: "0x4AAAAAAAjsuGjmm5ZcGWaB",
            theme: "light",
            });
        }
        </script>
        </span></article>
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