Solr:SolrJ（增删改查）

1、SolrJ

solrj是访问Solr服务的java客户端，提供索引和搜索的请求方法，java程序通过SolrJ请求Solr服务，最终Solr完在索引和搜索

2、增加文档

  @Test
    public void addDocument() throws Exception {
        SolrServer solrServer = new HttpSolrServer("http://localhost:8080/solr");
        SolrInputDocument document = new SolrInputDocument();
       
        document.addField("id", "p1");
        document.addField("title_ik", "z");
        document.addField("content_ik", "酸酸甜甜");
        document.addField("product_name", "橘子");
    
        solrServer.add(document);
     
        solrServer.commit();
    }

先获取Solr的连接，然后向文档中添加域，最后将域提交

"response": {
    "numFound": 1,
    "start": 0,
    "docs": [
      {
        "id": "p1",
        "title_ik": "z",
        "product_name": "橘子",
        "_version_": 1686879363571646500
      }
    ]

3、更新

与添加一样，ID相同时增加，ID不同是更新

4、删除

（1）根据ID

@Test
    public void deleteDocumentByid() throws Exception {
        SolrServer solrServer = new HttpSolrServer("http://localhost:8080/solr");
        solrServer.deleteById("c0001")；
        solrServer.commit();
    }

（2）根据条件

solrServer.deleteByQuery("*:*");

5、查询

（1）简单查询

 public void queryIndex() throws Exception {
        SolrServer solrServer = new HttpSolrServer("http://localhost:8080/solr");
        SolrQuery query = new SolrQuery();
        query.setQuery("*:*");
        QueryResponse queryResponse = solrServer.query(query);
        SolrDocumentList solrDocumentList = queryResponse.getResults();
        System.out.println("总量:" + solrDocumentList.getNumFound());
        for (SolrDocument solrDocument : solrDocumentList) {
            System.out.println(solrDocument.get("id"));
            System.out.println(solrDocument.get("product_name"));
            System.out.println(solrDocument.get("product_price"));
            System.out.println(solrDocument.get("product_catalog_name"));
            System.out.println(solrDocument.get("product_picture"));
        }
    }

默认只查询前十条数据

（2）复杂查询

@Test
    public void queryIndex2() throws Exception {
        //创建连接
        SolrServer solrServer = new HttpSolrServer("http://localhost:8080/solr");
        //创建一个query对象
        SolrQuery query = new SolrQuery();
        //设置查询条件
        query.setQuery("钻石");
        //过滤条件
        query.setFilterQueries("product_catalog_name:幽默杂货");
        //排序条件
        query.setSort("product_price", SolrQuery.ORDER.asc);
        //分页处理
        query.setStart(0);
        query.setRows(10);
        //结果中域的列表
        query.setFields("id","product_name","product_price","product_catalog_name","product_picture");
        //设置默认搜索域
        query.set("df", "product_keywords");
        //高亮显示
        query.setHighlight(true);
        //高亮显示的域
        query.addHighlightField("product_name");
        //高亮显示的前缀
        query.setHighlightSimplePre("<em>");
        //高亮显示的后缀
        query.setHighlightSimplePost("</em>");
        //执行查询
        QueryResponse queryResponse = solrServer.query(query);
        //取查询结果
        SolrDocumentList solrDocumentList = queryResponse.getResults();
        //共查询到商品数量
        System.out.println("共查询到商品数量:" + solrDocumentList.getNumFound());
        //遍历查询的结果
        for (SolrDocument solrDocument : solrDocumentList) {
            System.out.println(solrDocument.get("id"));
            //取高亮显示
            String productName = "";
            Map<String, Map<String, List<String>>> highlighting = queryResponse.getHighlighting();
            List<String> list = highlighting.get(solrDocument.get("id")).get("product_name");
            //判断是否有高亮内容
            if (null != list) {
                productName = list.get(0);
            } else {
                productName = (String) solrDocument.get("product_name");
            }

            System.out.println(productName);
            System.out.println(solrDocument.get("product_price"));
            System.out.println(solrDocument.get("product_catalog_name"));
            System.out.println(solrDocument.get("product_picture"));

        }
    }

高亮显示的数据与普通的数据是分开取出的