JAVA生成小程序码(太阳码)
首先准备工具类,这里我使用的是QrUtil;废话不多说,上工具类;
工具类是获取token使用;
appid = 小程序appID secret = 小程序秘钥
/** * @author : cph * @Email ：540826312@qq.com * @Date ：2020-07-04 9:27 */ @Component public class QrUtil { @Value("${wechat.appid}") private static String API_KEY; @Value("${wechat.secret}") private static String SECRET; public static String getApiKey() { return API_KEY; } public void setApiKey(String apiKey) { API_KEY = apiKey; } public static String getSECRET() { return SECRET; } public void setSECRET(String SECRET) { QrUtil.SECRET = SECRET; } public static String postToken() throws Exception { String requestUrl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+ API_KEY +"&secret="+SECRET; URL url = new URL(requestUrl); // 打开和URL之间的连接 HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("POST"); // 设置通用的请求属性 connection.setRequestProperty("Content-Type", "application/json"); connection.setRequestProperty("Connection", "Keep-Alive"); connection.setUseCaches(false); connection.setDoOutput(true); connection.setDoInput(true); // 得到请求的输出流对象 DataOutputStream out = new DataOutputStream(connection.getOutputStream()); out.writeBytes(""); out.flush(); out.close(); // 建立实际的连接 connection.connect(); // 定义 BufferedReader输入流来读取URL的响应 BufferedReader in = null; if (requestUrl.contains("nlp")) in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "GBK")); else in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8")); String result = ""; String getLine; while ((getLine = in.readLine()) != null) { result += getLine; } in.close(); JSONObject jsonObject = JSON.parseObject(result); String accesstoken=jsonObject.getString("access_token"); return accesstoken; } }生成小程序二维码接口 通过生成的小程序码转换成流返回给前端即可
@Override public String getminiqrQr(String sceneStr, String accessToken) { try { URL url = new URL("https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=" + accessToken); HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection(); httpURLConnection.setRequestMethod("POST");// 提交模式 // 发送POST请求必须设置如下两行 httpURLConnection.setDoOutput(true); httpURLConnection.setDoInput(true); // 获取URLConnection对象对应的输出流 PrintWriter printWriter = new PrintWriter(httpURLConnection.getOutputStream()); // 发送请求参数 JSONObject paramJson = new JSONObject(); paramJson.put("scene", sceneStr); paramJson.put("path", null); paramJson.put("width", 430); paramJson.put("auto_color", true); printWriter.write(paramJson.toString()); // flush输出流的缓冲 printWriter.flush(); //开始获取数据 // OutputStream os = new FileOutputStream(new File("C:/Users/Administrator/Desktop/1.png")); try (InputStream is = httpURLConnection.getInputStream(); ByteArrayOutputStream baos = new ByteArrayOutputStream();){ byte[] buffer = new byte[1024]; int len = -1; while ((len = is.read(buffer)) != -1) { baos.write(buffer, 0, len); } return Base64.getEncoder().encodeToString(baos.toByteArray()); } } catch (Exception e) { e.printStackTrace(); } return null; }到此为止,生成小程序码已完成,亲测可用
