? ????? Java ???? ?? ??? ?? ? WeChat ??? QR ??? ???? HTML ???? ???? ??? ?????. Java ??? ???? WeChat ?????? ???? QR ??? ???? Base64 ???? ?? ?????? ?? ??? ???? ??? ??? ???? ??? ?? ???. ?? ?? ??? ??? ??? ??? QR ??? ????? ???????. ?? ??? WeChat ?????? ?? ?? ? ?? ??? ???? ????? ?? ??? ?????.

?? ? Java ??? ??? ?? ???? Base64 ???? ???? ???? ? ??? ???.

 ??? accessToken = getAccessToken (); // ac
httpurlConnection Connection = (httpurlConnection) url.openConnection ();
Connection.setRequestMethod ( "post");
Connection.setDoOutput (true);
Connection.SetDoInput (true);
Connection.setRequestProperty ( "Content-Type", "Application/JSON; charset = utf-8");

// ?? ?? ?? ??? jsonobject paramjson = new JsonObject ();
paramjson.put ( "scene", "id = 1");
paramjson.put ( "page", "/pages/index/index");
outputStream outputStream = connection.getOutputStream ();
outputStream.write (paramjson.toString (). getBytes ( "UTF-8"));
outputStream.flush ();
outputStream.close ();


// ?? ??? ?? ?? inputStream inputStream = connection.getInputStream ();
??? [] imageBytes = inputStream.readallBytes (); // readAllBytes ()? ???? ?? ????? ???????. inputStream.close ();
??? base64image = base64.getEncoder (). encodetostring (imageBytes);

// Base64 ??? ? QR ?? ??? ???? ??? ??? ??????.

??? ?? HTML ? JavaScript ??? ??? ?????. ???? Base64? ??? ? ??? ???? ???? ???????. ??? ??? ???? base64Image ???? ?? ???? ???????. ??? ??? ?? ? ? data:image/jpeg;base64, ???? base64Image ???? ???? IMG ??? SRC ??? ???? QR ??? ???? ?????. ??? ??? ?? ??? ?? base64Image ???? ??? ??? ????? ???? ???? ?? ?? ? ? ??? ??? Content-Type application/json ?? ??? ??? ??? ?? ???? ???????. ?? ???? Base64 ???? ???? ???? ?? ??? ???? ? ?????.

? ??? Java? ?? ?? QR ??? WeChat ???? ???? ???? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!