使用java Dynamodb通过非主键获取数据

import software.amazon.awssdk.services.dynamodb.DynamoDbClient;
import software.amazon.awssdk.services.dynamodb.model.AttributeValue;
import software.amazon.awssdk.services.dynamodb.model.GetItemRequest;
import software.amazon.awssdk.services.dynamodb.model.GetItemResponse;

DynamoDbClient dynamoDbClient = DynamoDbClient.create();

String tableName = "your_table_name";
String primaryKey = "your_primary_key_value";
String nonPrimaryKey = "your_non_primary_key_value";

HashMap<String, AttributeValue> keyToGet = new HashMap<>();
keyToGet.put("primary_key_column_name", AttributeValue.builder().s(primaryKey).build());

HashMap<String, AttributeValue> nonKeyConditions = new HashMap<>();
nonKeyConditions.put("non_primary_key_column_name", AttributeValue.builder().s(nonPrimaryKey).build());

GetItemRequest getItemRequest = GetItemRequest.builder()
        .tableName(tableName)
        .key(keyToGet)
        .consistentRead(true)
        .build();

GetItemResponse getItemResponse = dynamoDbClient.getItem(getItemRequest);

Map<String, AttributeValue> item = getItemResponse.item();
if (item != null) {
    // 处理查询到的数据
} else {
    // 未找到匹配的数据
}