用Java实现带过滤表达式的DynamoDb查询

<dependency>
    <groupId>software.amazon.awssdk</groupId>
    <artifactId>dynamodb</artifactId>
</dependency>

import software.amazon.awssdk.services.dynamodb.DynamoDbClient;
import software.amazon.awssdk.services.dynamodb.model.*;

public class DynamoDbQueryExample {
    public static void main(String[] args) {
        // 创建DynamoDB客户端
        DynamoDbClient dynamoDbClient = DynamoDbClient.create();

        // 创建查询请求
        QueryRequest queryRequest = QueryRequest.builder()
                .tableName("your_table_name")
                .keyConditionExpression("#attr = :value")
                .expressionAttributeNames(Collections.singletonMap("#attr", "attribute_name"))
                .expressionAttributeValues(Collections.singletonMap(":value", AttributeValue.builder().s("attribute_value").build()))
                .filterExpression("filter_expression")
                .build();

        // 执行查询请求
        QueryResponse queryResponse = dynamoDbClient.query(queryRequest);

        // 处理查询结果
        for (Map<String, AttributeValue> item : queryResponse.items()) {
            // 处理每个查询结果项
        }
    }
}