<dependency> <groupId>com.github.wechatpay-apiv3</groupId> <artifactId>wechatpay-java</artifactId> <version>0.2.1</version> </dependency> 调用微信支付方法PrepayResponse response = service.prepay(request); 报异常okhttp3.RequestBody.create(Ljava/lang/String;Lokhttp3/MediaType;)Lokhttp3/RequestBody;