momokao

檔案資料以二進位型態存至資料庫中，載時，將二進位資料送至瀏覽器下載
class須繼承HttpServlet
String encodedFilename = "test.txt";  //下載的檔名
response.addHeader(
            "Content-Disposition",
            "inline; filename=\"" + encodedFilename + "\"");
try {
        FileInputStream is = new FileInputStream(fileName);   //fileName=實際檔案位置
        byte[] buffer = new byte[4096];
        int pos = 0;
        while ((pos = is.read(buffer)) != -1) {
            response.getOutputStream().write(buffer, 0, pos);
        }
} catch (Exception e) {
        log.error("Error on writing content : ", e);
}