AWS 文档 AWS SDK示例 GitHub 存储库中还有更多SDK示例
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使用 DynamoDB 的代码示例 AWS SDKs
以下代码示例向您展示了如何将 Amazon DynamoDB 与软件开发套件 () 一起 AWS 使用。SDK
操作是大型程序的代码摘录,必须在上下文中运行。您可以通过操作了解如何调用单个服务函数,还可以通过函数相关场景和跨服务示例的上下文查看操作。
场景是展示如何通过在同一服务中调用多个函数来完成特定任务任务的代码示例。
跨服务示例 是指跨多个 AWS 服务工作的示例应用程序。
更多资源
DynamoDB 开发人员指南 — 有关 DynamoDB 的更多信息。
Dynam API oDB 参考 — 有关所有可用的 DynamoDB 操作的详细信息。
AWS 开发者中心
— 您可以按类别或全文搜索筛选的代码示例。 AWS SDK示例
— 包含首选语言完整代码的 GitHub repo。包括有关设置和运行代码的说明。
开始使用
以下代码示例演示如何开始使用 DynamoDB。
- .NET
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- AWS SDK for .NET
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注意
还有更多相关信息 GitHub。在 AWS 代码示例存储库
中查找完整实例,了解如何进行设置和运行。 using Amazon.DynamoDBv2; using Amazon.DynamoDBv2.Model; namespace DynamoDB_Actions; public static class HelloDynamoDB { static async Task Main(string[] args) { var dynamoDbClient = new AmazonDynamoDBClient(); Console.WriteLine($"Hello Amazon Dynamo DB! Following are some of your tables:"); Console.WriteLine(); // You can use await and any of the async methods to get a response. // Let's get the first five tables. var response = await dynamoDbClient.ListTablesAsync( new ListTablesRequest() { Limit = 5 }); foreach (var table in response.TableNames) { Console.WriteLine($"\tTable: {table}"); Console.WriteLine(); } } }
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有关API详细信息,请参阅 “AWS SDK for .NET API参考 ListTables” 中的。
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- C++
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- SDK对于 C++
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注意
还有更多相关信息 GitHub。在 AWS 代码示例存储库
中查找完整实例,了解如何进行设置和运行。 CMakeLists.txt CMake 文件的代码。
# Set the minimum required version of CMake for this project. cmake_minimum_required(VERSION 3.13) # Set the AWS service components used by this project. set(SERVICE_COMPONENTS dynamodb) # Set this project's name. project("hello_dynamodb") # Set the C++ standard to use to build this target. # At least C++ 11 is required for the AWS SDK for C++. set(CMAKE_CXX_STANDARD 11) # Use the MSVC variable to determine if this is a Windows build. set(WINDOWS_BUILD ${MSVC}) if (WINDOWS_BUILD) # Set the location where CMake can find the installed libraries for the AWS SDK. string(REPLACE ";" "/aws-cpp-sdk-all;" SYSTEM_MODULE_PATH "${CMAKE_SYSTEM_PREFIX_PATH}/aws-cpp-sdk-all") list(APPEND CMAKE_PREFIX_PATH ${SYSTEM_MODULE_PATH}) endif () # Find the AWS SDK for C++ package. find_package(AWSSDK REQUIRED COMPONENTS ${SERVICE_COMPONENTS}) if (WINDOWS_BUILD AND AWSSDK_INSTALL_AS_SHARED_LIBS) # Copy relevant AWS SDK for C++ libraries into the current binary directory for running and debugging. # set(BIN_SUB_DIR "/Debug") # if you are building from the command line you may need to uncomment this # and set the proper subdirectory to the executables' location. AWSSDK_CPY_DYN_LIBS(SERVICE_COMPONENTS "" ${CMAKE_CURRENT_BINARY_DIR}${BIN_SUB_DIR}) endif () add_executable(${PROJECT_NAME} hello_dynamodb.cpp) target_link_libraries(${PROJECT_NAME} ${AWSSDK_LINK_LIBRARIES})
hello_dynamodb.cpp 源文件的代码。
#include <aws/core/Aws.h> #include <aws/dynamodb/DynamoDBClient.h> #include <aws/dynamodb/model/ListTablesRequest.h> #include <iostream> /* * A "Hello DynamoDB" starter application which initializes an Amazon DynamoDB (DynamoDB) client and lists the * DynamoDB tables. * * main function * * Usage: 'hello_dynamodb' * */ int main(int argc, char **argv) { Aws::SDKOptions options; // Optionally change the log level for debugging. // options.loggingOptions.logLevel = Utils::Logging::LogLevel::Debug; Aws::InitAPI(options); // Should only be called once. int result = 0; { Aws::Client::ClientConfiguration clientConfig; // Optional: Set to the AWS Region (overrides config file). // clientConfig.region = "us-east-1"; Aws::DynamoDB::DynamoDBClient dynamodbClient(clientConfig); Aws::DynamoDB::Model::ListTablesRequest listTablesRequest; listTablesRequest.SetLimit(50); do { const Aws::DynamoDB::Model::ListTablesOutcome &outcome = dynamodbClient.ListTables( listTablesRequest); if (!outcome.IsSuccess()) { std::cout << "Error: " << outcome.GetError().GetMessage() << std::endl; result = 1; break; } for (const auto &tableName: outcome.GetResult().GetTableNames()) { std::cout << tableName << std::endl; } listTablesRequest.SetExclusiveStartTableName( outcome.GetResult().GetLastEvaluatedTableName()); } while (!listTablesRequest.GetExclusiveStartTableName().empty()); } Aws::ShutdownAPI(options); // Should only be called once. return result; }
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有关API详细信息,请参阅 “AWS SDK for C++ API参考 ListTables” 中的。
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- Java
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- SDK适用于 Java 2.x
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注意
还有更多相关信息 GitHub。在 AWS 代码示例存储库
中查找完整实例,了解如何进行设置和运行。 import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.dynamodb.DynamoDbClient; import software.amazon.awssdk.services.dynamodb.model.DynamoDbException; import software.amazon.awssdk.services.dynamodb.model.ListTablesRequest; import software.amazon.awssdk.services.dynamodb.model.ListTablesResponse; import java.util.List; /** * Before running this Java V2 code example, set up your development * environment, including your credentials. * * For more information, see the following documentation topic: * * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html */ public class ListTables { public static void main(String[] args) { System.out.println("Listing your Amazon DynamoDB tables:\n"); Region region = Region.US_EAST_1; DynamoDbClient ddb = DynamoDbClient.builder() .region(region) .build(); listAllTables(ddb); ddb.close(); } public static void listAllTables(DynamoDbClient ddb) { boolean moreTables = true; String lastName = null; while (moreTables) { try { ListTablesResponse response = null; if (lastName == null) { ListTablesRequest request = ListTablesRequest.builder().build(); response = ddb.listTables(request); } else { ListTablesRequest request = ListTablesRequest.builder() .exclusiveStartTableName(lastName).build(); response = ddb.listTables(request); } List<String> tableNames = response.tableNames(); if (tableNames.size() > 0) { for (String curName : tableNames) { System.out.format("* %s\n", curName); } } else { System.out.println("No tables found!"); System.exit(0); } lastName = response.lastEvaluatedTableName(); if (lastName == null) { moreTables = false; } } catch (DynamoDbException e) { System.err.println(e.getMessage()); System.exit(1); } } System.out.println("\nDone!"); } }
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有关API详细信息,请参阅 “AWS SDK for Java 2.x API参考 ListTables” 中的。
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- JavaScript
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- SDK对于 JavaScript (v3)
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注意
还有更多相关信息 GitHub。在 AWS 代码示例存储库
中查找完整实例,了解如何进行设置和运行。 有关在中使用 DynamoDB 的更多详细信息,请参阅使用编程 DynamoDB AWS SDK for JavaScript。 JavaScript
import { ListTablesCommand, DynamoDBClient } from "@aws-sdk/client-dynamodb"; const client = new DynamoDBClient({}); export const main = async () => { const command = new ListTablesCommand({}); const response = await client.send(command); console.log(response.TableNames.join("\n")); return response; };
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有关API详细信息,请参阅 “AWS SDK for JavaScript API参考 ListTables” 中的。
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- Python
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- SDK适用于 Python (Boto3)
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注意
还有更多相关信息 GitHub。在 AWS 代码示例存储库
中查找完整实例,了解如何进行设置和运行。 import boto3 # Create a DynamoDB client using the default credentials and region dynamodb = boto3.client("dynamodb") # Initialize a paginator for the list_tables operation paginator = dynamodb.get_paginator("list_tables") # Create a PageIterator from the paginator page_iterator = paginator.paginate(Limit=10) # List the tables in the current AWS account print("Here are the DynamoDB tables in your account:") # Use pagination to list all tables table_names = [] for page in page_iterator: for table_name in page.get("TableNames", []): print(f"- {table_name}") table_names.append(table_name) if not table_names: print("You don't have any DynamoDB tables in your account.") else: print(f"\nFound {len(table_names)} tables.")
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有关API详细信息,请参阅ListTables中的 AWS SDKPython (Boto3) API 参考。
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- Ruby
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- SDK对于 Ruby
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注意
还有更多相关信息 GitHub。在 AWS 代码示例存储库
中查找完整实例,了解如何进行设置和运行。 require 'aws-sdk-dynamodb' require 'logger' # DynamoDBManager is a class responsible for managing DynamoDB operations # such as listing all tables in the current AWS account. class DynamoDBManager def initialize(client) @client = client @logger = Logger.new($stdout) end # Lists and prints all DynamoDB tables in the current AWS account. def list_tables @logger.info('Here are the DynamoDB tables in your account:') paginator = @client.list_tables(limit: 10) table_names = [] paginator.each_page do |page| page.table_names.each do |table_name| @logger.info("- #{table_name}") table_names << table_name end end if table_names.empty? @logger.info("You don't have any DynamoDB tables in your account.") else @logger.info("\nFound #{table_names.length} tables.") end end end if $PROGRAM_NAME == __FILE__ dynamodb_client = Aws::DynamoDB::Client.new manager = DynamoDBManager.new(dynamodb_client) manager.list_tables end
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有关API详细信息,请参阅 “AWS SDK for Ruby API参考 ListTables” 中的。
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