java springboot构建微信支付，使用apiv2密钥jsapi支付方式代码怎么写

以下是使用apiv2密钥jsapi支付方式的Java Spring Boot代码示例：

1. 创建微信支付配置类

@Configuration
public class WxPayConfig {

    @Value("${wxpay.appid}")
    private String appId;

    @Value("${wxpay.mchid}")
    private String mchId;

    @Value("${wxpay.key}")
    private String key;

    @Value("${wxpay.notifyurl}")
    private String notifyUrl;

    @Bean
    public WxPayService wxPayService() {
        WxPayService wxPayService = new WxPayServiceImpl();
        WxPayConfig payConfig = new WxPayConfig();
        payConfig.setAppId(appId);
        payConfig.setMchId(mchId);
        payConfig.setMchKey(key);
        payConfig.setNotifyUrl(notifyUrl);
        wxPayService.setConfig(payConfig);
        return wxPayService;
    }
}

2. 编写Controller接口

@RestController
@RequestMapping("/wxpay")
public class WxPayController {

    @Autowired
    private WxPayService wxPayService;

    @PostMapping("/jsapi")
    public ResultCode<Map<String, String>> jsapiPay(@RequestBody WxPayDto wxPayDto) throws WxPayException {
        WxPayUnifiedOrderRequest request = new WxPayUnifiedOrderRequest();
        request.setBody(wxPayDto.getBody());
        request.setOutTradeNo(wxPayDto.getOutTradeNo());
        request.setTotalFee(wxPayDto.getTotalFee());
        request.setSpbillCreateIp(wxPayDto.getSpbillCreateIp());
        request.setNotifyUrl(wxPayService.getConfig().getNotifyUrl());
        request.setTradeType(WxPayConstants.TradeType.JSAPI);
        request.setOpenid(wxPayDto.getOpenid());
        WxPayUnifiedOrderResult result = wxPayService.unifiedOrder(request);
        Map<String, String> jsApiParams = wxPayService.getJsapiPayParams(result.getPrepayId());
        return ResultCode.success(jsApiParams);
    }
}

3. 编写WxPayDto类（用于接收支付请求参数）

@Data
public class WxPayDto {

    @NotEmpty(message = "商品描述不能为空")
    private String body;

    @NotEmpty(message = "商户订单号不能为空")
    private String outTradeNo;

    @NotNull(message = "订单金额不能为空")
    private Integer totalFee;

    @NotEmpty(message = "终端IP不能为空")
    private String spbillCreateIp;

    @NotEmpty(message = "openid不能为空")
    private String openid;
}

4. 在application.yml文件中添加微信支付配置

wxpay:
  appid: your_appid  # 微信公众号appid
  mchid: your_mchid  # 商户号
  key: your_key  # 商户密钥
  notifyurl: your_notify_url  # 支付成功回调地址

以上代码示例仅供参考，具体实现方式可能会因业务需求而异。