PDFが別画面に表示されてしまう

public class DownLoadServlet extends HttpServlet {



  public void doPost(HttpServletRequest request, HttpServletResponse response) {

    this.doService(request, response);

  }

  public void doGet(HttpServletRequest request, HttpServletResponse response) {

    this.doService(request, response);

  }



  public void doService(HttpServletRequest request, HttpServletResponse response) {



    String fileName = "d:\files\aaa.pdf";



    InputStream inputStream = null;

    try {

      inputStream = new FileInputStream(file);

    } catch (FileNotFoundException e) {

      e.printStackTrace();

      return;

    }



    response.setContentType("application/pdf");

    response.setHeader("Content-Disposition", "inline; filename=" + fileName);



    int size;

    byte[] buffer = new byte[1024];

    try {

      while ((size = inputStream.read(buffer)) != -1) {

        response.getOutputStream().write(buffer, 0, size);

        response.getOutputStream().flush();

      }

    } catch (IOException e) {

      e.printStackTrace();

      return;

    } finally {

      if (inputStream != null) {

        try {

          inputStream.close();

        } catch (IOException e2) {

          e.printStackTrace();

          return;

        }

      }

    }

  }

}