注意:在ImageServlet中最后一行 ImageIO.write(bi, "JPG", response.getOutputStream()); 改为
ImageServlet
ImageIO.write(bi, "JPG", response.getOutputStream());
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(response.getOutputStream()); encoder.encode(bi);
因为可能发生java.nio.file.AccessDeniedException