使用IndexSearcher，IndexWriter对象对索引进行增删改查
直接贴代码了，方便日后查看，回顾
public class LuceneManager {
private IndexWriter getIndexWriter() throws IOException {
Directory directory = FSDirectory.open(new File("D://lucene//index"));//指定索引库存放位置Directory对象
Analyzer analyzer = new IKAnalyzer();
IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_4_10_3, analyzer);//指定分析器
IndexWriter indexWriter = new IndexWriter(directory, config);//创建IndexWriter
return indexWriter;
}
public IndexSearcher getIndexSearcher() throws Exception{
Directory directory = FSDirectory.open(new File("D://lucene//index"));
IndexReader r = DirectoryReader.open(directory);
return new IndexSearcher(r);
}
private void printResult(Query query,IndexSearcher indexSearcher) throws IOException {
TopDocs search = indexSearcher.search(query, 10);
for (ScoreDoc scoreDao : search.scoreDocs) {
int doc = scoreDao.doc;
Document document = indexSearcher.doc(doc);
System.out.println(document.get("fielName"));
//文件内容
// System.out.println(document.get("file_content"));
//文件大小
System.out.println(document.get("fileSize"));
//文件路径
System.out.println(document.get("filePath"));
System.out.println("=============");
}
}
@Test
public void testDeleteAll() throws Exception {
IndexWriter indexWriter = getIndexWriter();
indexWriter.deleteAll();//删除所有
indexWriter.close();
}
//按条件删除
@Test
public void testDelete() throws Exception{
IndexWriter indexWriter = getIndexWriter();
Query query = new TermQuery(new Term("fielName","apache"));
indexWriter.deleteDocuments(query);
indexWriter.close();
}
//修改，删掉一个在添加一个
@Test
public void testUpdate() throws Exception{
IndexWriter indexWriter = getIndexWriter();
Document doc = new Document();
doc.add(new TextField("fielName", "测试更新", Store.YES));
//先删，再添加
indexWriter.updateDocument(new Term("fielName","lucene"), doc,new IKAnalyzer());
indexWriter.close();
}
/*
* 使用Query的子类进行查询
*/
//查所有
@Test
public void findAll() throws Exception {
IndexSearcher indexSearcher = getIndexSearcher();
Query query = new MatchAllDocsQuery();
System.out.println(query);
printResult(query, indexSearcher);
//idnexSearch是通过构造创建，里面包含indexReader，可以这样关流
indexSearcher.getIndexReader().close();
}
//根据数值范围查
@Test
public void findByNumeriRangeQuery() throws Exception{
IndexSearcher indexSearcher = getIndexSearcher();
Query query = NumericRangeQuery.newLongRange("fileSize", 0L, 200L, true, false);//是否包含最大和最小值
System.out.println(query);
printResult(query, indexSearcher);
//idnexSearch是通过构造创建，里面包含indexReader，可以这样关流
indexSearcher.getIndexReader().close();
}
//组合查询 BooleanQuery
@Test
public void testBooleanQuery() throws Exception {
IndexSearcher indexSearcher = getIndexSearcher();
Query query1 = new TermQuery(new Term("fielName","apache"));
Query query2 = new TermQuery(new Term("fielName","lucene"));
/*
* 域值 +fielName:apache fielName:lucene
* MUST中域值前面带一个+，MUST_NOT是-号，should是空格
* must相当于and shuoud相当于or must_not相当于!(非)
*/
BooleanQuery bq = new BooleanQuery();
bq.add(query1, Occur.MUST_NOT);//必须，相当于and条件
bq.add(query2,Occur.MUST);//应该，
System.out.println(bq);
printResult(bq, indexSearcher);
indexSearcher.getIndexReader().close();
}
/*
* 使用queryparser查询
* 通过QueryParser也可以创建Query，
* QueryParser提供一个Parse方法，
* 此方法可以直接根据查询语法来查询。
* Query对象执行的查询语法可通过System.out.println(query);
*/
@Test
public void testQueryParse() throws Exception{
IndexSearcher searcher = getIndexSearcher();
//第一个参数默认搜索的域
String f = "fielName";
QueryParser queryParser = new QueryParser(f, new IKAnalyzer());
Query query = queryParser.parse("apache and java");//AND是关键字，会使用语法查询
searcher.search(query, 10);
printResult(query, searcher);
searcher.getIndexReader().close();
}
//指定多个默认域查询 MultiFieldQueryParser
@Test
public void testMultiField() throws Exception {
IndexSearcher indexSearcher = getIndexSearcher();
String[] f = {"fielName","fielContent"};
MultiFieldQueryParser fieldQueryParser = new MultiFieldQueryParser(f, new IKAnalyzer());
Query query = fieldQueryParser.parse("lucene AND lucene");
indexSearcher.search(query, 10);
printResult(query, indexSearcher);
indexSearcher.getIndexReader().close();
}
}
public class LuceneManager {
private IndexWriter getIndexWriter() throws IOException {Directory directory = FSDirectory.open(new File("D://lucene//index"));//指定索引库存放位置Directory对象Analyzer analyzer = new IKAnalyzer();IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_4_10_3, analyzer);//指定分析器IndexWriter indexWriter = new IndexWriter(directory, config);//创建IndexWriterreturn indexWriter;}public IndexSearcher getIndexSearcher() throws Exception{Directory directory = FSDirectory.open(new File("D://lucene//index"));IndexReader r = DirectoryReader.open(directory);return new IndexSearcher(r);}private void printResult(Query query,IndexSearcher indexSearcher) throws IOException {TopDocs search = indexSearcher.search(query, 10);for (ScoreDoc scoreDao : search.scoreDocs) {int doc = scoreDao.doc;Document document = indexSearcher.doc(doc); System.out.println(document.get("fielName")); //文件内容 // System.out.println(document.get("file_content")); //文件大小 System.out.println(document.get("fileSize")); //文件路径 System.out.println(document.get("filePath")); System.out.println("=============");}}@Testpublic void testDeleteAll() throws Exception {IndexWriter indexWriter = getIndexWriter();indexWriter.deleteAll();//删除所有indexWriter.close();}//按条件删除@Testpublic void testDelete() throws Exception{IndexWriter indexWriter = getIndexWriter();Query query = new TermQuery(new Term("fielName","apache"));indexWriter.deleteDocuments(query);indexWriter.close();}//修改，删掉一个在添加一个@Testpublic void testUpdate() throws Exception{IndexWriter indexWriter = getIndexWriter();Document doc = new Document();doc.add(new TextField("fielName", "测试更新", Store.YES));//先删，再添加indexWriter.updateDocument(new Term("fielName","lucene"), doc,new IKAnalyzer());indexWriter.close();}/* * 使用Query的子类进行查询 *///查所有@Testpublic void findAll() throws Exception {IndexSearcher indexSearcher = getIndexSearcher();Query query = new MatchAllDocsQuery();System.out.println(query);printResult(query, indexSearcher);//idnexSearch是通过构造创建，里面包含indexReader，可以这样关流indexSearcher.getIndexReader().close();}
//根据数值范围查@Testpublic void findByNumeriRangeQuery() throws Exception{IndexSearcher indexSearcher = getIndexSearcher();Query query = NumericRangeQuery.newLongRange("fileSize", 0L, 200L, true, false);//是否包含最大和最小值System.out.println(query);printResult(query, indexSearcher);//idnexSearch是通过构造创建，里面包含indexReader，可以这样关流indexSearcher.getIndexReader().close();}//组合查询 [email protected] void testBooleanQuery() throws Exception {IndexSearcher indexSearcher = getIndexSearcher();Query query1 = new TermQuery(new Term("fielName","apache"));Query query2 = new TermQuery(new Term("fielName","lucene"));/* * 域值 +fielName:apache fielName:lucene * MUST中域值前面带一个+，MUST_NOT是-号，should是空格 * must相当于and shuoud相当于or must_not相当于!(非) */BooleanQuery bq = new BooleanQuery();bq.add(query1, Occur.MUST_NOT);//必须，相当于and条件bq.add(query2,Occur.MUST);//应该，System.out.println(bq);printResult(bq, indexSearcher);indexSearcher.getIndexReader().close();}/* * 使用queryparser查询 * 通过QueryParser也可以创建Query， * QueryParser提供一个Parse方法， * 此方法可以直接根据查询语法来查询。 * Query对象执行的查询语法可通过System.out.println(query); */@Testpublic void testQueryParse() throws Exception{IndexSearcher searcher = getIndexSearcher();//第一个参数默认搜索的域String f = "fielName";QueryParser queryParser = new QueryParser(f, new IKAnalyzer());Query query = queryParser.parse("apache and java");//AND是关键字，会使用语法查询searcher.search(query, 10);printResult(query, searcher);searcher.getIndexReader().close();}//指定多个默认域查询 [email protected] void testMultiField() throws Exception {IndexSearcher indexSearcher = getIndexSearcher();String[] f = {"fielName","fielContent"};MultiFieldQueryParser fieldQueryParser = new MultiFieldQueryParser(f, new IKAnalyzer());Query query = fieldQueryParser.parse("lucene AND lucene");indexSearcher.search(query, 10);printResult(query, indexSearcher);indexSearcher.getIndexReader().close();}}
原文地址：https://www.cnblogs.com/a-small-lyf/p/10008872.html