适用于 Java 的 AWS SDK提供了 Dynamo DBMapper 类,允许您将客户端类映射到表。 Amazon DynamoDB 要使用 Dynamo DBMapper 类,您可以使用注解来定义 DynamoDB 表中的项目与其在代码中对应的对象实例之间的关系(如以下代码示例所示)。Dynamo DBMapper 类允许您访问表;执行各种创建、读取、更新和删除 (CRUD) 操作;...
本主题详细介绍了 APIs 适用于亚马逊 DynamoDB 的 Java 开发工具包高级版本从 1.x 版本 (v1) 到 (v2) 的变化。 AWS SDK for Java 2.x 我们首先介绍 object-to-table映射 API,然后讨论用于处理 JSON 样式文档的文档 API。 高级别更改 在v1 和 v2 中,每个库中映射客户端的名称有所不同: ...
By using the Enhanced Document API, you can create an EnhancedDocument instance to represent an item with no fixed schema, and then use the DynamoDB Enhanced Client to read and write to DynamoDB. Furthermore, unlike the Document APIs of aws-sdk-java 1.x, which provided ...
The DynamoDB Enhanced client is able to perform operations asynchronously by leveraging the underlying asynchronous APIs provided by the AWS SDK for Java 2.0. Instead of returning results directly, the asynchronous enhanced client operations will return CompletableFuture objects for the re...
AWS Java SDK version used: 2.13.47 JDK version used: Java 11 Operating System and version: Ubuntu (on EC2), AWS Lambda (whatever version of Linux that is) 👍 45 bill-phast added feature-request needs-triage labels Jun 30, 2020 debora-ito added dynamodb-enhanced and removed needs-triag...
问找不到AWS Java SDK DynamoDBClient类文件EN版权声明：本文内容由互联网用户自发贡献，该文观点仅代表...
问找不到AWS Java SDK DynamoDBClient类文件EN版权声明：本文内容由互联网用户自发贡献，该文观点仅代表...
com.amazonaws » aws-java-sdkApache The Amazon Web Services SDK for Java provides Java APIs for building software on AWS' cost-effective, scalable, and reliable infrastructure products. The AWS Java SDK allows developers to code against APIs for all of Amazon's infrastructure web services (Ama...
DynamoDbTable.deleteItem() only works with a condition expression if both expression names and expression values are specified. Stack trace: Exception in thread "main" java.lang.NullPointerException at software.amazon.awssdk.enhanced.dynamodb.internal.operations.DeleteItemOperation.addExpressionsIfExist(...
通过Java SDK删除AWS DynamoDB 当试图通过AWS Java SDK执行删除时,我得到了错误 DeleteItemSpec deleteItemSpec =newDeleteItemSpec() .withPrimaryKey("pk", messageId) .withConditionExpression("#ip > :val") .withNameMap(newNameMap() .with("#ip","timestamp")) .withValueMap(newValueMap() .with...