直接上代码：
1.首先引入maven依赖：
<dependency><groupId>com.github.binarywang</groupId><artifactId>weixin-java-miniapp</artifactId><version>3.8.0</version></dependency>
2.工具类：
/*** description: 微信小程序推送* create by: YangLinWei* create time: /7/28 2:24 下午*/@Slf4jpublic class SendMiniApp {private WxMaMsgService msgService;/*** description: 构造函数（初始化配置）* param: wxMpConfig 配置内容*/public SendMiniApp(String appId, String appSercret) {if (StringUtils.isEmpty(appId)) {throw new RuntimeException("appId不能为空");}if (StringUtils.isEmpty(appSercret)) {throw new RuntimeException("secret不能为空");}WxMaDefaultConfigImpl config = new WxMaDefaultConfigImpl();config.setAppid(appId);config.setSecret(appSercret);WxMaServiceImpl wxMaService = new WxMaServiceImpl();wxMaService.setWxMaConfig(config);msgService = wxMaService.getMsgService();}/*** description: 发送订阅消息* param: openId 用户的openid* param: templateId 模板id* param: dataParam 参数内容*/public void sendSubscribeMsg(String openId, String templateId, List<WxMaSubscribeMessage.Data> dataParam) throws WxErrorException {// 3.8.0版本使用的使用WxMaSubscribeMessageWxMaSubscribeMessage.WxMaSubscribeMessageBuilder builder = WxMaSubscribeMessage.builder();builder.toUser(openId);//推送消息的目标对象openIdbuilder.templateId(templateId); //这里填写的就是在后台申请添加的模板IDbuilder.data(dataParam);//添加请求参数WxMaSubscribeMessage msg = builder.build();msgService.sendSubscribeMsg(msg);}/*** description: 发送订阅消息* param: openId 用户的openid* param: templateId 模板id* param: dataParam 参数内容* param: page 跳转链接*/public void sendSubscribeMsg(String openId, String templateId, List<WxMaSubscribeMessage.Data> dataParam, String page) throws WxErrorException {// 3.8.0版本使用的使用WxMaSubscribeMessageWxMaSubscribeMessage.WxMaSubscribeMessageBuilder builder = WxMaSubscribeMessage.builder();builder.toUser(openId);//推送消息的目标对象openIdbuilder.templateId(templateId); //这里填写的就是在后台申请添加的模板IDbuilder.data(dataParam);//添加请求参数builder.page(page); //添加跳转链接，如果目标用户点击了推送的消息，则会跳转到小程序主页WxMaSubscribeMessage msg = builder.build();msgService.sendSubscribeMsg(msg);}}
