更新 (22.03.2021)

随着本周SAP Cloud SDK 的发布，3.41.0我们将启用对类型安全 API 上 OData 批处理请求中的读取操作的支持。请在相应的文档中找到相关章节。例子：

BusinessPartnerService service;
BusinessPartnerAddress addressToCreate1;
BusinessPartnerAddress addressToCreate2;

BusinessPartnerFluentHelper requestTenEntities = service.getAllBusinessPartner().top(10);
BusinessPartnerByKeyFluentHelper requestSingleEntity = service.getBusinessPartnerByKey("bupa9000");

BatchResponse result =
    service
        .batch()
        .addReadOperations(requestTenEntities)
        .addReadOperations(requestSingleEntity)
        .executeRequest(destination);

List<BusinessPartner> entities = result.getReadResult(requestTenEntities);
BusinessPartner entity = result.getReadResult(requestSingleEntity);

原回复：

我来自SAP Cloud SDK团队。通常，我们建议用户为其 OData 服务交互生成类。通过这种方式，你可以轻松确保请求符合规范，同时兼顾类型安全。

不幸的是，我无法帮助你使用 的 API BatchRequestBuilder，BatchRequest或者BatchResult因为它们不是SAP Cloud SDK 的直接一部分，也不是由我们维护的。相反，我们建议我们自己的请求构建器。

如果类的生成，上面的联系，是不适合你的选择，那么我会建议尝试我们的专家API为特色的通用的OData客户端的SAP云SDK。这是我们也将在内部用于生成的请求构建器的代码：

String servicePath = "/sap/opu/odata/sap/YY1_QUANTITYCONTRACTTRACKI_CDS";
ODataRequestBatch requestBatch = new ODataRequestBatch(servicePath, ODataProtocol.V2);
Map<Contract, ODataRequestRead> batchedRequests = new HashMap<>();

// iterate over contracts, construct OData query objects and add them to the OData batch request builder
for (Contract contract : contracts) {
    String entityName = sapConfig.getEssentialsContractListEntity();
    String serviceUrl = sapConfig.getEssentialsContractServiceUrl();
    StructuredQuery structuredQuery = StructuredQuery.onEntity(entityName, ODataProtocol.V2);

    structuredQuery.select("SalesSchedulingAgreement", "PurchaseOrderByCustomer", "Customer", "CustomerName", "SalesSchedulingAgreementItem", "Material", "MaterialByCustomer");
    structuredQuery.filter(FieldReference.of("SalesSchedulingAgreement").equalTo(contract.getSchAgrmntNo()));
    structuredQuery.filter(FieldReference.of("PurchaseOrderByCustomer").equalTo(contract.getCustRefNo()));

    String encodedQuery = structuredQuery.getEncodedQueryString();
    ODataRequestRead requestRead = new ODataRequestRead(serviceUrl, entityName, encodedQuery, ODataProtocol.V2);
    batchedRequests.put(contract, requestRead);
    requestBatch.addRead(requestRead);
}

// execute the OData batch request
ODataRequestResultMultipartGeneric batchResult = requestBatch.execute(httpClient);

// extract information from batch response, by referring to the individual OData request references
for( Map.Entry<Contract, ODataRequestRead> requestMapping : batchedRequests.entrySet() ) {
    ODataRequestResultGeneric queryResult = batchResult.getResult(requestMapping.getValue());
    List<Map<String, Object>> itemsForQuery = queryResult.asListOfMaps();
}

亲切的问候

亚历山大