【微信小程序】 java如何生成小程序码，并跳转到指定落地页 demo

article/2025/3/18 22:11:03

前言：
需求场景，用户通过扫描小程序码，到指定的页码，希望能帮到大家，切记，要等到小程序发版测能测试。

1、微信官网

https://developers.weixin.qq.com/miniprogram/dev/framework/open-ability/qr-code.html 官网中给出了几个接口：
在这里插入图片描述
我们用接口b，wxacode.getUnlimited

看到官网说明：page会跳用到某一个界面，如果页面有参数，放在scene里，这里有一掉我们要注意，小程序必须要发版，才能进行测试。

2、代码

	import cn.hutool.core.io.FileUtil;import cn.hutool.core.io.IoUtil;import cn.hutool.http.HttpRequest;import cn.hutool.http.HttpUtil;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.JSONObject;@Value("${wx.miniapp.url.getTokenUrl}")private String GET_TOKEN_URL;@Value("${wx.miniapp.configs[2].appid}")private String appId;@Value("${wx.miniapp.configs[2].secret}")private String secret;@Value("${wx.miniapp.url.getQrCodeUrl}")private String GET_QR_CODE_URL;@Value("${tmp.save.url}")private String SAVE_IMG_URL;/*** 获得小程序accessToken** @return*/public String getAccessToken() {String fullUrl = String.format(GET_TOKEN_URL, appId, secret);String result = HttpUtil.get(fullUrl);if (StringUtils.isBlank(result)) {log.info(QR_CODE_APPID_SECRET_FAIL.getMessage());throw new ServiceException(MbUserResultEnum.QR_CODE_APPID_SECRET_FAIL);}log.info("getAccessToken(),result:{}", result);JSONObject jsonObject = JSON.parseObject(result);String accessToken = (String) jsonObject.get("access_token");if (StringUtils.isBlank(accessToken)) {log.info(QR_CODE_APPID_SECRET_FAIL.getMessage());throw new ServiceException(MbUserResultEnum.QR_CODE_APPID_SECRET_FAIL);}return accessToken;}/*** 从小程序获得二维码图片** @param req* @return*/private byte[] getImgByWX(QrCodeMappingReq req) {String accessToken = getAccessToken();String fullUrl = String.format(GET_QR_CODE_URL, accessToken);JsonObject scene = new JsonObject();scene.addProperty("scene", req.getQrCode());if(null != req.getPage()){scene.addProperty("page",req.getPage());}if(null != req.getCheck_path()){scene.addProperty("check_path",req.getCheck_path());}if(null != req.getEnv_version()){scene.addProperty("env_version",req.getEnv_version());}if(null != req.getWidth()){scene.addProperty("width",req.getWidth());}if(null != req.getAuto_color()){scene.addProperty("auto_color",req.getAuto_color());}if(null != req.getLine_color()){scene.addProperty("line_color",req.getLine_color());}if(null != req.getIs_hyaline()){scene.addProperty("is_hyaline",req.getIs_hyaline());}log.info("scene:,{}",scene.toString());byte[] bytes = HttpRequest.post(fullUrl).body(scene.toString()).execute().bodyBytes();if (null == bytes) {log.info(MbUserResultEnum.WX_CREATR_IMG_FAIL.getMessage());throw new ServiceException(MbUserResultEnum.WX_CREATR_IMG_FAIL);}return bytes;}