Wechat applet order payment backend demo

Environmental preparation

• For the enterprise version of the applet, the appId and appSecret of the applet are obtained here.
• The small program opens WeChat payment, which involves the merchant account, and binds the merchant account and WeChat.

WeChat official document

下单URL地址：https://api.mch.weixin.qq.com/pay/unifiedorder
Some parameters are as follows:

add dependencies

<!--        微信支付生成随机字符序列的依赖-->
        <dependency>
            <groupId>com.github.wxpay