How to force files to open in browser instead of download (pdf)?

其實這是治標不治本的方法，因為之前程序就已經(jīng)實現(xiàn)了該功能。

        response.setHeader("Content-Disposition", "attachment;filename=" +finalFileName);//To have the file downloaded rather than viewed
        response.addHeader("Content-Length", "" + file.length());
        response.setContentType("application/octet-stream");