<!--微信支付-->
<dependency>
    <groupId>com.github.wechatpay-apiv3</groupId>
    <artifactId>wechatpay-java</artifactId>
    <version>0.2.12</version>
</dependency>
// 调用下单方法，得到应答
PrepayResponse response = service.prepay(request);
// 使用微信扫描 code_url 对应的二维码，即可体验Native支付
System.out.println(response.getCodeUrl());
Map<String, Object> map = new HashMap<>(1);
map.put("codeUrl", response.getCodeUrl());
return map;