如何在solrj中添加多值文字

import org.apache.solr.client.solrj.SolrClient;
import org.apache.solr.client.solrj.impl.HttpSolrClient;
import org.apache.solr.common.SolrInputDocument;

public class SolrjExample {
    public static void main(String[] args) throws Exception {
        // 创建SolrClient对象
        String solrUrl = "http://localhost:8983/solr/mycollection";
        SolrClient solrClient = new HttpSolrClient.Builder(solrUrl).build();

        // 创建SolrInputDocument对象
        SolrInputDocument document = new SolrInputDocument();

        // 添加多值字段和值
        document.addField("id", "1");
        document.addField("title", "Solrj Example");
        document.addField("category", "Search");
        document.addField("category", "Big Data");

        // 提交文档
        solrClient.add(document);

        // 提交更改
        solrClient.commit();

        // 关闭SolrClient连接
        solrClient.close();
    }
}