[分组聚合] 基于 Lucene8 进行多值字段分组聚合 (多属性字段)

@RunWith(SpringRunner.class)@SpringBootTest(classes = {com.pap.lucene.LuceneAutoConfiguration.class})@TestPropertySource("classpath:application.properties")@FixMethodOrder(MethodSorters.JVM)public class LuceneAutoConfigurationTest {
    @Autowired    private SearcherManager searcherManager;    @Autowired    private IndexWriter indexWriter;    @Autowired    private DirectoryTaxonomyWriter taxoWriter;
    @Test    public void init() throws Exception {        FacetsConfig facetsConfigInit = new FacetsConfig();        facetsConfigInit.setMultiValued("MCategory", true);
        indexDocument(indexWriter, taxoWriter, facetsConfigInit, "pap.net.cn 1", "pap.net.cn of content 1", "alex,gao", "Tag A");        indexDocument(indexWriter, taxoWriter, facetsConfigInit, "pap.net.cn 2", "pap.net.cn of content 2", "alex,pap", "Tag B");        indexDocument(indexWriter, taxoWriter, facetsConfigInit, "pap.net.cn 3", "pap.net.cn of content 3", "gao", "Tag A");        indexDocument(indexWriter, taxoWriter, facetsConfigInit, "pap.net.cn 4", "pap.net.cn of content 4", "gao", "Tag B");
        indexWriter.commit();        taxoWriter.commit();
    }
    @Test    public void search() throws Exception {        Query query = new TermQuery(new Term("content", "content"));
        searcherManager.maybeRefresh();        IndexSearcher indexSearcher = searcherManager.acquire();
        FacetsCollector facetsCollector = new FacetsCollector();        FacetsCollector.search(indexSearcher, query, 10, facetsCollector);
        FacetsConfig facetsConfigSearch = new FacetsConfig();        Facets facets = new FastTaxonomyFacetCounts(new DirectoryTaxonomyReader(taxoWriter), facetsConfigSearch, facetsCollector);
        FacetResult category = facets.getTopChildren(10, "Category");        if(category != null) {            for(LabelAndValue labelValues : category.labelValues) {                System.out.println(labelValues.label + " : " + labelValues.value);            }        }        System.out.println("------");        FacetResult MCategory = facets.getTopChildren(10, "MCategory");        if(MCategory != null) {            for(LabelAndValue labelValues : MCategory.labelValues) {                System.out.println(labelValues.label + " : " + labelValues.value);            }        }    }
    private static void indexDocument(IndexWriter indexWriter, DirectoryTaxonomyWriter taxoWriter, FacetsConfig facetsConfig, String title, String content, String category, String tag) throws IOException {        Document doc = new Document();        doc.add(new StringField("title", title, Field.Store.YES));        doc.add(new TextField("content", content, Field.Store.YES));        doc.add(new FacetField("Category", category));        for(String tmp :category.split(",")) {            doc.add(new FacetField("MCategory", tmp));        }        doc.add(new FacetField("Tag", tag));        indexWriter.addDocument(facetsConfig.build(taxoWriter, doc));    }}