lucene简单入门demo

package com.pdsu.lucene; /** * 类说明： * * @author 作者: LiuJunGuang * @version 创建时间：2011-12-29 下午04:40:39 */ public class Article { private int id; private String title; private String content; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public Article(int id, String title, String content) { super(); this.id = id; this.title = title; this.content = content; } public Article() { super(); } @Override public String toString() { return "Article [id=" + id + ", title=" + title + ", content=" + content + "]"; } }

lucene简单应用

package com.pdsu.lucene; import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.List; import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.analysis.standard.StandardAnalyzer; 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.IndexWriter; import org.apache.lucene.index.IndexWriter.MaxFieldLength; 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.store.Directory; import org.apache.lucene.store.FSDirectory; import org.apache.lucene.util.Version; import org.junit.Test; /** * 类说明： * * @author 作者: LiuJunGuang * @version 创建时间：2011-12-29 下午04:42:21 */ public class Lucene { @Test public void insert() throws IOException { Article article = new Article(1, "lucene is very good!", "lucene very good!,lucene very good!"); Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_30);// 分词器 Directory dir = FSDirectory.open(new File("./store")); // 数据存储目录 IndexWriter index = new IndexWriter(dir, analyzer, MaxFieldLength.LIMITED); Document document = new Document();// 文档对象 Field idField = new Field("id", String.valueOf(article.getId()), Store.YES, Index.NOT_ANALYZED); Field titleField = new Field("title", article.getTitle(), Store.YES, Index.ANALYZED); Field contentField = new Field("content", article.getContent(), Store.YES, Index.NOT_ANALYZED); document.add(idField); document.add(titleField); document.add(contentField); index.addDocument(document);// 添加文档对象 index.close(); } @Test public void query() throws Exception{ Directory dir = FSDirectory.open(new File("./store")); // 数据存储目录 IndexSearcher indexSearcher = new IndexSearcher(dir); Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_30);// 分词器 QueryParser qp = new QueryParser(Version.LUCENE_30, "title", analyzer); Query query = qp.parse("lucene"); TopDocs tops = indexSearcher.search(query, 10); //获得记录总条数 int count = tops.totalHits; ScoreDoc []scoreDocs = tops.scoreDocs;//得到目录 List<Article> articles = new ArrayList<Article>(); for (int i = 0; i < scoreDocs.length; i++) { float score = scoreDocs[i].score;//相关度得分 int doc = scoreDocs[i].doc; Document document = indexSearcher.doc(doc); Article article = new Article(Integer.parseInt(document.get("id")), document.get("title"),document.get("content")); articles.add(article); } System.out.println(articles); } }