java识别条形码

这只是空闲之余做的，要是有前端配合或者会前端的话也不至于干这么无聊的事情，直接前端调起微信摄像头就解决了。

请求工具方法。

public static String httpRequest(String requestUrl, String requestMethod, String output) {
        try {
            URL url = new URL(requestUrl);
            HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
            connection.setRequestMethod(requestMethod);
            connection.setDoOutput(true);
            connection.setDoInput(true);
            connection.setUseCaches(false);
            if (null != output) {
                OutputStream outputStream = connection.getOutputStream();
                outputStream.write(output.getBytes("utf-8"));
                outputStream.close();
            }
            // 从输入流读取返回内容
            InputStream inputStream = connection.getInputStream();
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
            String str = null;
            StringBuffer buffer = new StringBuffer();
            while ((str = bufferedReader.readLine()) != null) {
                buffer.append(str);
            }
            bufferedReader.close();
            inputStreamReader.close();
            inputStream.close();
            inputStream = null;
            connection.disconnect();
            return buffer.toString();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }

调用。

结果：