@Test
    public void queryTest() throws SolrServerException, IOException {
        // 连接solr服务器
        HttpSolrServer solrServer = new HttpSolrServer("http://localhost:8080/solr/core2");
         
        // 创建查询条件对象
        SolrQuery params = new SolrQuery("*:*");
        // 执行查询，获取响应数据
        QueryResponse response = solrServer.query(params);
        // 获取结果集数据
        SolrDocumentList list = response.getResults();
        // 处理结果集
        System.out.println("一共获取了" + list.size()+"条结果：");
        for (SolrDocument solrDocument : list) {
            System.out.println("id: " + solrDocument.getFieldValue("id"));
            System.out.println("title:" + solrDocument.getFieldValue("title"));
        }
    }