Google pay java 后端验证方式二

Google Pay主要支付流程

1.手机端向Java服务端发起支付，生成预订单，给手机端返回生成的订单号

2.手机端向Google发起支付（传入本地服务器生成的订单号）

3.Google服务器将支付结果返回给手机端（因这边用到的是消耗型的产品，所以购买后必须要通知gp我已经消耗了这次交易）

4.手机端向Java服务端发送校验请求，校验通过后即可处理订单（服务端重试校验，发货，保证订单正常发货成功）

配置

packageName：应用包名

credential：密钥

Java服务端处理

前提条件，需要在海外服务器才能成功调取Google Api否则会出现超时的情况

maven依赖：

<project>
  <dependencies>
    <dependency>
      <groupId>com.google.apis</groupId>
      <artifactId>google-api-services-androidpublisher</artifactId>
      <version>v3-rev20211125-1.32.1</version>
    </dependency>
  </dependencies>
</project>

 校验代码：

@RestController
public class GoogleController {

    //	packageName为应用程序包名、productId商品id、purchaseToken谷歌返回的收据
    @PostMapping("/")
    public ProductPurchase checkOrder(@RequestBody GooglePayDto googlePayDto,
                              HttpServletRequest requestDto) throws IOException, GeneralSecurityException {
        //使用服务帐户Json文件获取Google凭据
        List<String> scopes = new ArrayList<>();
        scopes.add(AndroidPublisherScopes.ANDROIDPUBLISHER);
        ResourceLoader resourceLoader = new DefaultResourceLoader();
        Resource resource = resourceLoader.getResource("classpath:static/刚下载的json文件，这里放到了static目录下");
        GoogleCredential credential = GoogleCredential.fromStream(resource.getInputStream())
                .createScoped(scopes);
//        使用谷歌凭据和收据从谷歌获取购买信息
        HttpTransport httpTransport = GoogleNetHttpTransport.newTrustedTransport();
        JacksonFactory jsonFactory = new JacksonFactory();
        AndroidPublisher publisher = new AndroidPublisher.Builder(httpTransport, jsonFactory, credential)
                .setApplicationName("应用程序名").build();
        AndroidPublisher.Purchases purchases = publisher.purchases();
        final AndroidPublisher.Purchases.Products.Get request = purchases.products().get(googlePayDto.getPackageName(), googlePayDto.getProductId(),googlePayDto.getPurchaseToken());
        System.out.println("==============="+request+"================");
        final ProductPurchase purchase = request.execute();
        //处理业务
        Integer purchaseState = purchase.getPurchaseState();
        if (!GooglePayStatus.PURCHASED.getValue().equals(purchaseState) &&!GoogleConsumptionStatus.YET_TO_BE_CONSUMED.getValue().equals(purchase.getConsumptionState())) {
            log.info("==========>订单校验【成功】");
        } else {
            log.info("==========>订单校验【失败】");
        }
        return purchase;
    }
}

public class GooglePayDto {

    String packageName;
    String productId;
    String purchaseToken;

    public String getPackageName() {
        return packageName;
    }

    public void setPackageName(String packageName) {
        this.packageName = packageName;
    }

    public String getProductId() {
        return productId;
    }

    public void setProductId(String productId) {
        this.productId = productId;
    }

    public String getPurchaseToken() {
        return purchaseToken;
    }

    public void setPurchaseToken(String purchaseToken) {
        this.purchaseToken = purchaseToken;
    }
}

测试

前台传入三个参数

packageName：包名

productId：商品id

purchaseToken：支付凭证

结果：