如何在ElasticSearch Java API中添加多个字段进行排序？

import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.sort.SortBuilders;
import org.elasticsearch.search.sort.SortOrder;

public class ElasticSearchExample {
    private RestHighLevelClient client;

    public ElasticSearchExample() {
        // 初始化Elasticsearch客户端
        client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http")));
    }

    public void searchWithMultipleSortFields() throws IOException {
        // 创建搜索请求
        SearchRequest searchRequest = new SearchRequest("your_index_name");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();

        // 设置查询条件
        sourceBuilder.query(QueryBuilders.matchAllQuery());

        // 添加多个排序字段
        sourceBuilder.sort(SortBuilders.fieldSort("field1").order(SortOrder.ASC));
        sourceBuilder.sort(SortBuilders.fieldSort("field2").order(SortOrder.DESC));
        // 可以继续添加更多的排序字段...

        searchRequest.source(sourceBuilder);

        // 执行搜索请求
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);

        // 处理搜索结果
        // ...

        // 关闭Elasticsearch客户端
        client.close();
    }

    public static void main(String[] args) {
        ElasticSearchExample example = new ElasticSearchExample();
        try {
            example.searchWithMultipleSortFields();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}