lucene5(4)修改指定索引的搜索权重

1、介绍

lucene可以对指定索引的字段修改搜索权重，使权重大的索引优先显示

2、代码

@Test
public void TestBoot() throws Exception {
    IndexWriter writer = getIndexWriter(indexDir);
    Document document = new Document();
    // 添加一个文档信息，相当于一个数据库表字段
    Field nameField = new TextField("name", "hello world", Field.Store.YES);
    // 权值默认1,该值越大排名越前
    nameField.setBoost(1.5F);
    document.add(nameField);
    document.add(new TextField("describes", "测试luence", Field.Store.YES));
    writer.addDocument(document);
    writer.close();
}
 
@Test
public void TestSearch() throws Exception {
    IndexReader reader = getIndexReader();
    IndexSearcher searcher = new IndexSearcher(reader);
    // 指定Document的某个属性
    QueryParser parser = new QueryParser("name", getAnalyzer());
    // 指定索引内容，对应某个分词
    Query query = parser.parse("hello");
    TopDocs hits = searcher.search(query, 10);
    for (ScoreDoc sd : hits.scoreDocs) {
        Document doc = searcher.doc(sd.doc);
        //显示搜索结果的评分(评分=权重*搜索匹配评分)
        System.out.println("name:" + doc.get("name") + ",评分:"+sd.score);
    }
    reader.close();
}