lucene4.10.2实例（增删改查）

最新jar和src免费下载：http://download.csdn.net/detail/u011518709/8248403

lucene 包的组成结构：对于外部应用来说索引模块(index)和检索模块(search)是主要的外部应用入口

org.apache.Lucene.search/ 搜索入口

org.apache.Lucene.index/ 索引入口 
org.apache.Lucene.analysis/ 语言分析器 
org.apache.Lucene.queryParser/ 查询分析器 
org.apache.Lucene.document/ 存储结构 
org.apache.Lucene.store/ 底层IO/存储结构 
org.apache.Lucene.util/ 一些公用的数据结构

代码中引用的jar ,在上述相对于的文件下copy相关的jar文件

package com.util;

import java.io.File;
import java.io.IOException;
import java.io.StringReader;
import java.util.List;

import org.apache.log4j.Logger;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.StringField;
import org.apache.lucene.document.TextField;
import org.apache.lucene.document.Field.Store;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.LogDocMergePolicy;
import org.apache.lucene.index.LogMergePolicy;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.apache.lucene.queryparser.classic.MultiFieldQueryParser;
import org.apache.lucene.queryparser.classic.ParseException;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TermQuery;
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.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;
import org.wltea.analyzer.lucene.IKAnalyzer;
/**
 * version:lucene4.10.2
 * lucene download:
 * @author zp
 * date 2014-12-12
 */
public class Index410 {
    private final static Logger logger = Logger.getLogger(Index410.class);
    private static String indexPath = "G://lucene//index";

    public static void main(String[] args) {
        try {
          createIndex();
//           searchIndex("码农");
//           query();
//           deleteIndex();
//            forceDeleteIndex();
//            query();
//            highlighterSearch();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /**
     * 创建索引
     */
    public static void createIndex() {
        // 最细粒切分算法--true的话是 智能切分
        Analyzer analyzer = new IKAnalyzer(false);
        Document doc = null;
        IndexWriter indexWriter = null;
        try {
            indexWriter = getIndexWriter(analyzer);
            // 添加索引
            doc = new Document();
            doc.add(new StringField("id", "1", Store.YES));
            doc.add(new TextField("title", "标题：开始", Store.YES));
            doc.add(new TextField("content", "内容：我现在是个码农", Store.YES));
            indexWriter.addDocument(doc);
            doc = new Document();
            doc.add(new StringField("id", "2", Store.YES));
            doc.add(new TextField("title", "标题：结束", Store.YES));
            doc.add(new TextField("content", "内容:我现在是个lucene开发工程师的专家",Store.YES));
            indexWriter.addDocument(doc);
            indexWriter.commit();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            logger.info("索引器发送异常");
        } finally {
            try {
                destroyWriter(indexWriter);
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    /**
     * 搜索文档
     *
     * @param keyword
     */
    @SuppressWarnings("deprecation")
    public static void searchIndex(String keyword) {
        IndexReader indexReader = null;
        IndexSearcher indexSearcher = null;
        try {
            // 1.创建Directory 在硬盘上的G:/luence/index下建立索引
            Directory dir = FSDirectory.open(new File(indexPath));
            // 2.创建IndexReader
            indexReader = IndexReader.open(dir);
            // 实例化搜索器
            indexSearcher = new IndexSearcher(indexReader);

            // 使用QueryParser查询分析器构造Query对象
            QueryParser parse = new QueryParser(Version.LUCENE_4_10_1,"content", new IKAnalyzer(false));
            // 搜索包含keyword关键字的文档
            Query query = parse.parse(keyword.trim());

            // 使用lucene构造搜索引擎的时候，如果要针对多个域进行一次性查询
            // 这种方法的好处就是可以加权给字段的控制
            // 在这四个域中检索
            String[] fields = { "phoneType", "name", "category", "price" };
            Query querys = new MultiFieldQueryParser(Version.LATEST, fields,new IKAnalyzer(false)).parse(keyword.trim());

            TopDocs results = indexSearcher.search(query, 1000);
            // 6.根据TopDocs获取ScoreDoc对象
            ScoreDoc[] score = results.scoreDocs;
            if (score.length > 0) {
                logger.info("查询结果数：" + score.length);
                System.out.println("查询结果数：" + score.length);
                for (int i = 0; i < score.length; i++) {
                    // 7.根据Seacher和ScoreDoc对象获取具体的Document对象
                    Document doc = indexSearcher.doc(score[i].doc);
                    // 8.根据Document对象获取需要的值
                    System.out.println(doc.toString());
                    System.out.println(doc.get("title") + "["+ doc.get("content") + "]");
                }
            } else {
            }
        } catch (Exception e) {
            // TODO: handle exception
            logger.info("查询结果为空！");
        } finally {
            if (indexReader != null) {
                try {
                    indexReader.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }

    }

    /**
     * 对搜索返回的前n条结果进行分页显示
     *
     * @param keyWord
     *            查询关键词
     * @param pageSize
     *            每页显示记录数
     * @param currentPage
     *            当前页
     * @throws ParseException
     */
    @SuppressWarnings("deprecation")
    public void paginationQuery(String keyWord, int pageSize, int currentPage)
            throws IOException, ParseException {
        String[] fields = { "title", "content" };
        QueryParser queryParser = new MultiFieldQueryParser(Version.LATEST,fields, new IKAnalyzer());
        Query query = queryParser.parse(keyWord.trim());

        IndexReader indexReader = IndexReader.open(FSDirectory.open(new File(
                indexPath)));
        IndexSearcher indexSearcher = new IndexSearcher(indexReader);

        // TopDocs 搜索返回的结果
        TopDocs topDocs = indexSearcher.search(query, 100);// 只返回前100条记录
        TopDocs all = indexSearcher.search(new MatchAllDocsQuery(), 100);
        // int totalCount = topDocs.totalHits; // 搜索结果总数量
        ScoreDoc[] scoreDocs = topDocs.scoreDocs; // 搜索返回的结果集合

        // 查询起始记录位置
        int begin = pageSize * (currentPage - 1);
        // 查询终止记录位置
        int end = Math.min(begin + pageSize, scoreDocs.length);

        // 进行分页查询
        for (int i = begin; i < end; i++) {
            int docID = scoreDocs[i].doc;
            System.out.println("docID=" + docID);
            Document doc = indexSearcher.doc(docID);
            String title = doc.get("title");
            System.out.println("title is : " + title);
        }
        indexReader.close();
    }

    @SuppressWarnings("deprecation")
    public static void highlighterSearch() throws IOException, ParseException, InvalidTokenOffsetsException {
        IndexReader reader = IndexReader.open(FSDirectory.open(new File(indexPath)));
        IndexSearcher searcher = new IndexSearcher(reader);

        // String []fields={"title","content"};
        // QueryParser parser=new MultiFieldQueryParser(Version.LATEST, fields,
        // new IKAnalyzer());
        // Query query=parser.parse("");

        Term term = new Term("content", "lucene");
        TermQuery query = new TermQuery(term);

        TopDocs topdocs = searcher.search(query, Integer.MAX_VALUE);
        ScoreDoc[] scoreDoc = topdocs.scoreDocs;
        System.out.println("查询结果总数:" + topdocs.totalHits);
        System.out.println("最大的评分:" + topdocs.getMaxScore());

        for(int i=0;i<scoreDoc.length;i++){
        	int docid=scoreDoc[i].doc;
       	    Document document=searcher.doc(docid);
        	System.out.println("检索关键字："+term.toString());
        	String  content=document.get("content");
        	//高亮展示
        	SimpleHTMLFormatter  formatter=new SimpleHTMLFormatter("<font color='red'>", "");
            Highlighter highlighter=new Highlighter(formatter, new QueryScorer(query));
            highlighter.setTextFragmenter(new SimpleFragmenter(content.length())); 

            if(!"".equals(content)){
                TokenStream tokenstream=new IKAnalyzer().tokenStream(content, new StringReader(content));
                String highLightText = highlighter.getBestFragment(tokenstream,content);
                System.out.println("高亮显示第 " + (i + 1) + " 条检索结果如下所示：");
                System.out.println(highLightText);
                /*End:结束关键字高亮*/
                System.out.println("文件内容:"+content);
                System.out.println("匹配相关度："+scoreDoc[i].score);
            }
        }
    }

    /**
     * 获取indexWriter对象---获取索引器
     *
     * @param dir
     * @param analyer
     * @return
     * @throws IOException
     */
    private static IndexWriter getIndexWriter(Analyzer analyzer)
            throws IOException {
        File indexFile = new File(indexPath);
        if (!indexFile.exists())
            indexFile.mkdir();// 索引库不存在 则新建一个
        Directory directory = FSDirectory.open(indexFile);
        // Directory directory = new RAMDirectory(); //在内存中建立索引

        IndexWriterConfig conf = new IndexWriterConfig(Version.LUCENE_4_10_1,
                analyzer);
        LogMergePolicy mergePolicy = new LogDocMergePolicy();
        // 索引基本配置
        // 设置segment添加文档(Document)时的合并频率
        // 值较小,建立索引的速度就较慢
        // 值较大,建立索引的速度就较快,>10适合批量建立索引
        mergePolicy.setMergeFactor(30);
        // 设置segment最大合并文档(Document)数
        // 值较小有利于追加索引的速度
        // 值较大,适合批量建立索引和更快的搜索
        mergePolicy.setMaxMergeDocs(5000);
        conf.setMaxBufferedDocs(10000);
        conf.setMergePolicy(mergePolicy);
        conf.setRAMBufferSizeMB(64);

        conf.setOpenMode(OpenMode.CREATE_OR_APPEND);
        if (IndexWriter.isLocked(directory)) {// ?
            IndexWriter.unlock(directory);
        }
        IndexWriter indexWriter = new IndexWriter(directory, conf);
        return indexWriter;
    }

    /**
     * 销毁writer
     *
     * @param writer
     * @throws IOException
     */
    private static void destroyWriter(IndexWriter indexWriter)
            throws IOException {
        if (indexWriter != null) {
            indexWriter.close();
        }
    }

    /**
     * 批量删除
     *
     * @param list
     * @throws IOException
     */
    public static void deleteIndexs(List list) throws IOException {
        if (list == null || list.size() > 0) {
            logger.debug("beans is null");
            return;
        }
        for (int i=0 ;i<list.size();i++) {
            deleteIndex();
        }
    }

    /**
     * 删除单个索引 --不会立刻删除，生成.del文件
     *
     * @param bean
     * @throws IOException
     */
    private static void deleteIndex() throws IOException {
        // if(bean==null){
        // logger.debug("Get search bean is empty!");
        // return;
        // }
        IndexWriter indexWriter = getIndexWriter(new IKAnalyzer());
        // 参数是一个选项，可以是一个Query,也可以是一个term,term是一个精确查找的值
        // 这里删除id=1的文档，还会留在”回收站“。xxx.del
        indexWriter.deleteDocuments(new Term("id", "1"));
        destroyWriter(indexWriter);
    }

    /**
     * 查询文档
     */
    @SuppressWarnings("deprecation")
    public static void query() {
        // 1.创建Directory 在硬盘上的F:/luence/index下建立索引
        try {
            IndexReader indexReader = IndexReader.open(FSDirectory
                    .open(new File(indexPath)));
            System.out.println("存储的文档数:" + indexReader.numDocs());
            System.out.println("总存储量:" + indexReader.maxDoc());
            System.out.println("被删除的文档：" + indexReader.numDeletedDocs());
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /**
     * 回滚回收站
     *
     * @throws IOException
     */
    public void recoveryIndexByIsDelete() throws IOException {
        IndexWriter indexWriter = getIndexWriter(new IKAnalyzer());
        indexWriter.rollback();
        destroyWriter(indexWriter);
    }

    /**
     * 清空回收站 在版本3.6之后，已经没有了unDeleteAll()方法了
     *
     * @throws IOException
     */
    public static void forceDeleteIndex() throws IOException {
        IndexWriter indexWriter = getIndexWriter(new IKAnalyzer());
        indexWriter.forceMergeDeletes();
        destroyWriter(indexWriter);
    }

    /**
     * 更新索引
     *
     * @throws IOException
     */
    public void update() throws IOException {
        IndexWriter indexWriter = new IndexWriter(FSDirectory.open(new File(
                indexPath)), new IndexWriterConfig(Version.LATEST,
                new IKAnalyzer(true)));
        Document document = new Document();
        document.add(new Field("id", "10", Field.Store.YES,Field.Index.NOT_ANALYZED_NO_NORMS));
        document.add(new Field("email", "9481629991", Field.Store.YES,Field.Index.NOT_ANALYZED));
        document.add(new Field("name", "小米", Field.Store.YES,Field.Index.NOT_ANALYZED_NO_NORMS));
        document.add(new Field("content", "小米好", Field.Store.NO,Field.Index.ANALYZED));

        // 这里的更新，从方法上可以看出，它实际上时将旧的删除，然后添加一个新文档的进去，将匹配到term的文档删除，然后就新的document添加进去
        indexWriter.updateDocument(new Term("id", "1"), document);
        indexWriter.close();
    }

}