lucence完整项目

package cn.itcast0210.lucene.hellworld; import java.io.File; 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.Fieldable; 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.search.WildcardQuery; import org.apache.lucene.store.Directory; import org.apache.lucene.store.FSDirectory; import org.apache.lucene.util.Version; import org.junit.Test; import cn.itcast0210.lucene.bean.Article; /* * 把一篇文章上传到索引库中，并且检索出来 */ public class HelloWorld { /** * 为这个文章创建一个索引 */ @Test public void createIndex() throws Exception { /* * 思路： * 模拟创建一个文章对象 * 把文章这个对象放入到索引库中 */ // 1 创建文章对象 Article article = new Article(); article.setId(1); article.setTitle("lucene可以做搜索引擎"); article.setContent("baidu,google都是很好的搜索引擎"); // 2 放入到索引库中 IndexWriter indexWriter = null; // 1 对indexWriter进行初始化 /* * 创建IndexWriter的三个参数 * Directory 索引库 * Analyzer 分词器 */ /** * 创建Directory 在当前目录下创建索引库，索引库的名称为indexDir */ Directory directory = FSDirectory.open(new File("./indexDir")); /* * 创建分词器 基本的分析器 */ Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_30); indexWriter = new IndexWriter(directory, analyzer, MaxFieldLength.LIMITED); /** ******************************************************************************* */ /* * 从artile到document的转化 */ /** * 1、创建Document对象 */ Document document = new Document(); /* * Field构造函数有4个参数 name 属性的名称 value 属性的值 Store Index */ Field idField = new Field("id", article.getId().toString(), 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.ANALYZED); document.add(idField); document.add(titleField); document.add(contentField); indexWriter.addDocument(document); // 关闭io流的过程 indexWriter.close(); } /** * 根据关键字检索信息 */ @Test public void searchIndex() throws Exception { List<Article> articleList = new ArrayList<Article>(); IndexSearcher indexSearcher = null; /* * 构建query对象 */ /** * 先构建QueryParser对象 参数3个 * 版本 * 字段 * 分词器 */ Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_30); QueryParser queryParser = new QueryParser(Version.LUCENE_30, "content", analyzer); Query query = queryParser.parse("lucene");// 关键词 Directory directory = FSDirectory.open(new File("./indexDir")); // 创建indexSearch过程 indexSearcher = new IndexSearcher(directory); TopDocs topDocs = indexSearcher.search(query, 1); int totalCount = topDocs.totalHits;// 根据关键词搜索出来的总的记录数 ScoreDoc[] scoreDocs = topDocs.scoreDocs; for (int i = 0; i < scoreDocs.length; i++) { int index = scoreDocs[i].doc; float score = scoreDocs[i].score;// 相关度得分 Document document = indexSearcher.doc(index); /* * 把document转化成article ,并且输出 */ // document.getField("id").stringValue(); Article article = new Article(); article.setId(Integer.parseInt(document.get("id"))); article.setTitle(document.get("title")); article.setContent(document.get("content")); articleList.add(article); } for (Article article : articleList) { System.out.println(article.getId()); System.out.println(article.getTitle()); System.out.println(article.getContent()); } } }