AWS SDK for Java 2.0提供了适用于Athena的客户端库。以下是使用AthenaClient执行查询并处理返回结果的示例：

import software.amazon.awssdk.auth.credentials.DefaultCredentialsProvider;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.athena.AthenaClient;
import software.amazon.awssdk.services.athena.model.*;

import java.util.List;
import java.util.concurrent.ExecutionException;

public class AthenaQueryExample {

    private static final String ATHENA_DB = "your-database-name";
    private static final String ATHENA_OUTPUT_BUCKET = "s3://your-bucket-name/your-folder-name/";
    private static final String ATHENA_QUERY_STRING = "SELECT count(*) FROM your-table-name WHERE your-column-name = 'your-value'";

    public static void main(String[] args) {
        // create Athena client
        AthenaClient athenaClient = AthenaClient.builder()
                .credentialsProvider(DefaultCredentialsProvider.create())
                .region(Region.US_WEST_2)
                .build();

        // setup query execution request
        StartQueryExecutionRequest startQueryExecutionRequest = StartQueryExecutionRequest.builder()
                .queryString(ATHENA_QUERY_STRING)
                .queryExecutionContext(QueryExecutionContext.builder().database(ATHENA_DB).build())
                .resultConfiguration(ResultConfiguration.builder().outputLocation(ATHENA_OUTPUT_BUCKET).build())
                .build();

        // execute query and get query execution ID
        String queryExecutionId = athenaClient.startQueryExecution(startQueryExecutionRequest).queryExecutionId();

        // setup query results request
        GetQueryResultsRequest getQueryResultsRequest = GetQueryResultsRequest.builder()
                .queryExecutionId(queryExecutionId)
                .build();

        // poll query status until query completes
        boolean isQueryStillRunning = true;
        while (isQueryStillRunning) {
            GetQueryExecutionRequest getQueryExecutionRequest = GetQueryExecutionRequest.builder().queryExecutionId(queryExecutionId).build();
            QueryExecution queryExecution = athenaClient.getQueryExecution(getQueryExecutionRequest).queryExecution();
            String queryState = queryExecution.status().state();

            if (queryState.equals(QueryExecutionState.FAILED.toString())) {
                throw new RuntimeException("Athena