后台生成的二维码图片怎么传给前台？java

Question

sevelet在后台生成了微信支付的二维码图片，怎么传给前台，我是一个新手，老师留的大作业，就差微信支付没做了，这是后台生成的二维码，怎么在前台调用，这是后台生成二维码的代码 try {

int width = 200;

int height = 200;

System.out.println("123");
String format = "png";

Hashtable hints = new Hashtable();

hints.put(EncodeHintType.CHARACTER_SET, "utf-8");

BitMatrix bitMatrix = new MultiFormatWriter().encode(code_url, BarcodeFormat.QR_CODE, width, height, hints);

OutputStream out = null;

out = response.getOutputStream();

MatrixToImageWriter.writeToStream(bitMatrix, format, out);

out.flush();

out.close();

Answer 1

http://blog.csdn.net/u012418896/article/details/44021351