1. 添加微信支付相关依赖

<!-- 微信支付 -->
<dependency><groupId>com.github.wxpay</groupId><artifactId>wxpay-sdk</artifactId><version>0.0.3</version>
</dependency>
<dependency><groupId>com.github.binarywang</groupId><artifactId>weixin-java-miniapp</artifactId><version>4.4.2.B</version>
</dependency>
<dependency><groupId>com.github.binarywang</groupId><artifactId>weixin-java-pay</artifactId><version>4.2.0</version>
</dependency>
<dependency><groupId>com.github.binarywang</groupId><artifactId>weixin-java-mp</artifactId><version>4.4.0</version>
</dependency>

2. 在 a