Amazon dynamodb DynamoDB项目集合<；QueryYoutCome>；到java对象

我想将ItemCollection转换为我的java pojo对象。目前我想通过以下方式进行转换。最好的方法是什么

  QuerySpec spec = new QuerySpec()
                .withKeyConditionExpression("txn_id = :txnId")
                .withFilterExpression("rrn = :rrn")
                .withValueMap(new ValueMap()
                        .withString(":txnId", txnId)
                        .withString(":rrn", rrn))
                .withConsistentRead(true);
        ItemCollection<QueryOutcome> items = table.query(spec);

是的，看一看。使用相同的pojo注释

CatalogItem partitionKey = new CatalogItem();

partitionKey.setId(102);
DynamoDBQueryExpression<CatalogItem> queryExpression = new DynamoDBQueryExpression<CatalogItem>()
    .withHashKeyValues(partitionKey);

List<CatalogItem> itemList = mapper.query(CatalogItem.class, queryExpression);

for (int i = 0; i < itemList.size(); i++) {
    System.out.println(itemList.get(i).getTitle());
    System.out.println(itemList.get(i).getBookAuthors());
}

CatalogItem partitionKey=new CatalogItem（）；
partitionKey.setId（102）；
DynamoDBQueryExpression queryExpression=新建DynamoDBQueryExpression（）
.withHashKeyValues（partitionKey）；
List itemList=mapper.query（CatalogItem.class，queryExpression）；
对于（int i=0；i

public class Test implements Serializable {


@DynamoDBAttribute(attributeName = "txn_id")
@JsonProperty("txn_id")
@DynamoDBHashKey
private String txnId;

private String umn;
private String note;

@DynamoDBAttribute(attributeName = "rrn")
private String rrn;

@DynamoDBAttribute(attributeName = "expire_on")
private Date expireOn;



@DynamoDBAttribute(attributeName = "expire_after")
private Integer expireAfter;

@DynamoDBAttribute(attributeName = "created_on")
@DynamoDBAutoGeneratedTimestamp(strategy= DynamoDBAutoGenerateStrategy.CREATE)
private Date createdOn;

}

CatalogItem partitionKey = new CatalogItem();

partitionKey.setId(102);
DynamoDBQueryExpression<CatalogItem> queryExpression = new DynamoDBQueryExpression<CatalogItem>()
    .withHashKeyValues(partitionKey);

List<CatalogItem> itemList = mapper.query(CatalogItem.class, queryExpression);

for (int i = 0; i < itemList.size(); i++) {
    System.out.println(itemList.get(i).getTitle());
    System.out.println(itemList.get(i).getBookAuthors());
}