前提需要：

微信的access_token

跳轉(zhuǎn)頁面：pages/index/index

代碼實(shí)現(xiàn)：

//獲取微信小程序二維碼//sceneStr:頁面攜帶的參數(shù)public String getminiqrQr(String sceneStr) {String accessToken = "你自己的access_token";//隨機(jī)數(shù)代表圖片名Integer qrcodeId = (int) (1 + Math.random() * (1000 - 1 + 1));String urlQrCode = "";String urls = "https://api.weixin.qq.com/wxa/getwxacode?access_token=" + accessToken;Map<String, Object> param = new HashMap<>();//orgId:頁面攜帶的參數(shù)param.put("path", "pages/index/index?orgId=" + sceneStr);param.put("width", 430);param.put("auto_color", false);Map<String, Object> line_color = new HashMap<>();line_color.put("r", 0);line_color.put("g", 0);line_color.put("b", 0);param.put("line_color", line_color);logger.info("調(diào)用生成微信URL接口傳參:" + param);logger.info("調(diào)用生成微信URL接口:" + urls);try {URL url = new URL(urls);HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();httpURLConnection.setRequestMethod("POST");// 提交模式httpURLConnection.setConnectTimeout(10000);//連接超時(shí) 單位毫秒httpURLConnection.setReadTimeout(10000);//讀取超時(shí) 單位毫秒// 發(fā)送POST請(qǐng)求必須設(shè)置如下兩行httpURLConnection.setDoOutput(true);httpURLConnection.setDoInput(true);// 獲取URLConnection對(duì)象對(duì)應(yīng)的輸出流PrintWriter printWriter = new PrintWriter(httpURLConnection.getOutputStream());printWriter.write(JSON.toJSONString(param));// flush輸出流的緩沖printWriter.flush();//開始獲取數(shù)據(jù)BufferedInputStream bis = new BufferedInputStream(httpURLConnection.getInputStream());OutputStream os = new FileOutputStream(new File("二維碼生成地址"));int len;//設(shè)置緩沖寫入byte[] arr = new byte[2048];while ((len = bis.read(arr)) != -1) {os.write(arr, 0, len);os.flush();}os.close();} catch (Exception e) {e.printStackTrace();}return "二維碼生成地址";}

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