请求的什么接口？具体的报错贴出来

/** 商户号 */
@Value("${webCart.merchantId}")
private  String merchantId ;
/** 商户API私钥路径 */
@Value("${webCart.privateKeyPath}")
private String privateKeyPath ;
/** 商户证书序列号 */
@Value("${webCart.merchantSerialNumber}")
private String merchantSerialNumber ;
/** 商户APIV3密钥 */
@Value("${webCart.apiV3key}")
private String apiV3key;

private static Config config;

public  PrepayResponse main() {
    // 构建service
    NativePayService service = new NativePayService.Builder().config(config).build();
    // request.setXxx(val)设置所需参数，具体参数可见Request定义
    PrepayRequest request = new PrepayRequest();
    Amount amount = new Amount();
    amount.setTotal(100);
    request.setAmount(amount);
    request.setAppid("wxxxxxxxxxxxxxxxc");
    request.setMchid("16xxxxxx93");
    request.setDescription("测试商品标题");
    request.setNotifyUrl("https://notify_url");
    request.setOutTradeNo("out_trade_no_001");
    // 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());
    return response;
}
@PostConstruct
private void init(){
    // 使用自动更新平台证书的RSA配置
    // 一个商户号只能初始化一个配置，否则会因为重复的下载任务报错
     config =
            new RSAAutoCertificateConfig.Builder()
                    .merchantId(merchantId)
                    .privateKeyFromPath(PathUtil.getPath(privateKeyPath))
                    .merchantSerialNumber(merchantSerialNumber)
                    .apiV3Key(apiV3key)
                    .build();
}
//修改后
// 构建service
JsapiService service = new JsapiService.Builder().config(config).build();
// request.setXxx(val)设置所需参数，具体参数可见Request定义
PrepayRequest request = new PrepayRequest();
Amount amount = new Amount();
amount.setTotal(100);
Payer payer = new Payer();
payer.setOpenid("oKxxxxxxxx-xxxxxxxxxxx");
request.setAmount(amount);
request.setAppid("wxxxxxxx71xxxxxx2c");
request.setMchid("1xxxxxxxxxx3");
request.setDescription("测试商品标题");
request.setNotifyUrl("https://notify_url");
request.setOutTradeNo("out_trade_no_001");
request.setPayer(payer);
// 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());*/
return response;