SolrJ增刪改查操作（入門級）

最近學習了Lucene和Solr，Java操作Solr就叫SolrJ了，這是我膚淺的理解，下面記錄下簡單的一些操作，方面日後複習

 

首先導入jar包座標

<!--SolrJ-->
        <dependency>
            <groupId>org.apache.solr</groupId>
            <artifactId>solr-solrj</artifactId>
            <version>7.7.2</version>
        </dependency>

 

然後編寫測試類代碼（隨着Jar包版本更新，寫法會不一樣，注意一下）：

 

添加：

@Test
    public void testAdd() throws IOException, SolrServerException {

        String solrURL="http://localhost:8080/solr/collection1";

        HttpSolrClient.Builder builder = new HttpSolrClient.Builder(solrURL);
        HttpSolrClient client = builder.build();

        SolrInputDocument doc = new SolrInputDocument();
        doc.setField("id","123");
        doc.setField("age",22);
        
        //doc.setField("asd","nono");
        /*添加一個不存在的Field數據，竟然不報錯*/
        
        client.add(doc);
        client.commit();
        /*記得提交，不然結果不生效*/

    }

 

刪除

@Test
    public void testDelete() throws IOException, SolrServerException {

        String solrURL="http://localhost:8080/solr/collection1";

        HttpSolrClient.Builder builder = new HttpSolrClient.Builder(solrURL);
        HttpSolrClient client = builder.build();

        client.deleteById("123");

        /*刪除所有*/
        //client.deleteByQuery("*:*");
        
        client.commit();
    }

 

修改

修改與添加調用的方法是一致的，都是使用add方法，當ID已經存在時，直接覆蓋，這樣等同於修改

 

查詢（重點）

 @Test
    public void test2() throws IOException, SolrServerException {
        String solrURL="http://localhost:8080/solr/collection1";
        HttpSolrClient.Builder builder = new HttpSolrClient.Builder(solrURL);
        HttpSolrClient client = builder.build();

        SolrQuery query = new SolrQuery();
//        query.setFields("id");
        query.set("q","*:*");
        query.set("fq","age:[1 TO 20]");
        query.addSort("age", SolrQuery.ORDER.desc);

        QueryResponse response = client.query(query);
        SolrDocumentList results = response.getResults();
        long num = results.getNumFound();

        System.out.println("num "+num);
        for (SolrDocument doc : results) {
            System.out.printf("id:%s，name:%s age:%s\n", doc.get("id"), doc.get("name"), doc.get("age"));
        }

    }

 

修改：（api沒有修改的方法，只能通過id，先獲取之前的doc裏面的值，然後新建一個doc，進行覆蓋，id相同就可以覆蓋）

        SolrInputDocument document = new SolrInputDocument();   //新的文檔，直接覆蓋舊的
        SolrDocument originalDoc = solrClient.getById(id);
        Collection<String> fieldNames = originalDoc.getFieldNames();
        for (String fieldName : fieldNames) {
            Object value = originalDoc.getFieldValue(fieldName);
            document.addField(fieldName, value);
        }
        
        solrClient.add(document);
        solrClient.commit();