我可以使用以下代码重新索引整个solr核心：

 public void indexSolr() throws SolrServerException, IOException {
    HttpSolrServer solr = new HttpSolrServer(solrIndexPath);
    logger.info("Indexing fcv solr at " + solrIndexPath);

    // reindex to pickup new articles
    ModifiableSolrParams params = new ModifiableSolrParams();
    params.set("qt", "/" + solrDataImportPath);
    params.set("command", "full-import");
    params.set("clean", "true");
    params.set("commit", "true");
    solr.query(params);
}

如何仅将一个文档插入索引而不必对整个对象进行索引？

解决方法:

您是否正在寻找这样的东西？

public void insertOneDoc() throws SolrServerException, IOException {
  HttpSolrServer solr = new HttpSolrServer(solrIndexPath);
  SolrInputDocument doc = new SolrInputDocument();
  doc.addField("fieldName", "fieldValue");
  solr.add(doc);
  solr.commit();
}

因为那样会将单个文档添加到HttpSolrServer引用的索引中.