lucene3.0+版本中文分词测试+搜索结果+创建索引测试
- import java.io.File;
- import java.io.IOException;
- import java.io.StringReader;
- import org.apache.lucene.analysis.Analyzer;
- import org.apache.lucene.analysis.TokenStream;
- import org.apache.lucene.analysis.tokenattributes.TermAttribute;
- import org.apache.lucene.document.Document;
- import org.apache.lucene.document.Field;
- import org.apache.lucene.document.Field.Index;
- import org.apache.lucene.document.Field.Store;
- import org.apache.lucene.index.CorruptIndexException;
- import org.apache.lucene.index.IndexWriter;
- import org.apache.lucene.index.IndexWriter.MaxFieldLength;
- import org.apache.lucene.queryParser.ParseException;
- import org.apache.lucene.queryParser.QueryParser;
- import org.apache.lucene.search.IndexSearcher;
- import org.apache.lucene.search.Query;
- import org.apache.lucene.search.ScoreDoc;
- import org.apache.lucene.search.TopDocs;
- import org.apache.lucene.search.highlight.Highlighter;
- import org.apache.lucene.search.highlight.InvalidTokenOffsetsException;
- import org.apache.lucene.search.highlight.QueryScorer;
- import org.apache.lucene.search.highlight.SimpleFragmenter;
- import org.apache.lucene.search.highlight.SimpleHTMLFormatter;
- import org.apache.lucene.store.FSDirectory;
- import org.apache.lucene.store.LockObtainFailedException;
- import org.apache.lucene.util.Version;
- import org.wltea.analyzer.lucene.IKAnalyzer;
- public class AnalzyerTest {
- /**
- * lucene3.0开始已经抛弃了原来的分词方式,转而使用新的分词方式<br>
- * 本方法以SmartChineseAnalyzer为例,演示如何分词以及取得分词之后的term
- * http://blog.csdn.net/yjflinchong/article/details/7906116
- * @throws Exception
- */
- public static void analysis() throws Exception {
- Analyzer analyzer = new IKAnalyzer();
- String string = "据外媒报道,菲律宾国防部长加斯明9日称,多种新式战机、船只将于年内陆续交付军方,菲国防实力将得到大幅增强。但加斯明同时强调,此次军备采购与黄岩岛争端无关。";
- StringReader reader = new StringReader(string);
- TokenStream ts = analyzer.tokenStream("", reader);
- TermAttribute termAttribute = ts.getAttribute(TermAttribute.class);
- while (ts.incrementToken()) {
- System.out.println(termAttribute.term() + " ");
- }
- System.out.println();
- }
- /**
- * 建索引
- * 在构造IndexWriter时必须使用Directory作为参数了
- *
- * @throws CorruptIndexException
- * @throws LockObtainFailedException
- * @throws IOException
- */
- private static void build() throws CorruptIndexException, LockObtainFailedException, IOException {
- String path = "index";
- IndexWriter writer = new IndexWriter(FSDirectory.open(new File(path)), new IKAnalyzer(), true, MaxFieldLength.LIMITED);
- Document document = new Document();
- document.add(new Field("text", "中国人民银行采取了一系列措施防止人民币升值,但是很遗憾,这些措施在今天看来其作用是微乎其微的。难道真的就没有什么别的措施防止人民币再次疯狂升值了吗?", Store.YES, Index.ANALYZED));
- writer.addDocument(document);
- writer.optimize();
- writer.close();
- }
- /**
- *
- * @param keyword
- * @throws CorruptIndexException
- * @throws IOException
- * @throws ParseException
- * @throws InvalidTokenOffsetsException
- */
- private static void search(String keyword) throws CorruptIndexException, IOException, ParseException, InvalidTokenOffsetsException {
- Analyzer analyzer = new IKAnalyzer();
- QueryParser parser = new QueryParser(Version.LUCENE_30, "text", analyzer);
- IndexSearcher searcher = new IndexSearcher(FSDirectory.open(new File("index")));
- Query query = parser.parse(keyword);
- System.out.println(query);
- TopDocs topDocs = searcher.search(query, 10);
- ScoreDoc[] scoreDocs = topDocs.scoreDocs;
- System.out.println("hits:" + topDocs.totalHits);
- for (ScoreDoc scoreDoc : scoreDocs) {
- Document doc = searcher.doc(scoreDoc.doc);
- String text = doc.get("text");
- System.out.println(highlight(text, query, analyzer));
- }
- }
- /**
- * 高亮关键词
- * http://blog.csdn.net/yjflinchong/article/details/7906116
- * @param content
- * 需要高亮的内容
- * @param query
- * 搜索时使用的Query对象
- * @param analyzer
- * 分词器
- * @return 高亮之后的文本
- * @throws IOException
- * @throws InvalidTokenOffsetsException
- */
- private static String highlight(String content, Query query, Analyzer analyzer) throws IOException, InvalidTokenOffsetsException {
- SimpleHTMLFormatter formatter = new SimpleHTMLFormatter("<b>", "</b>");
- Highlighter highlighter = new Highlighter(formatter, new QueryScorer(query));
- highlighter.setTextFragmenter(new SimpleFragmenter(100));
- String resultString = highlighter.getBestFragment(analyzer.tokenStream("", new StringReader(content)), content);
- return resultString + "...";
- }
- public static void main(String[] args) throws Exception {
- analysis();
- build();
- search("人民币 升值");
- }
- }
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时间: 2024-12-10 11:59:42