lucene的代码示范

import java.io.BufferedReader;import java.io.File;import java.io.FileReader;import java.io.IOException;import java.nio.file.FileSystems;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.TextField;import org.apache.lucene.index.DirectoryReader;import org.apache.lucene.index.IndexWriter;import org.apache.lucene.index.IndexWriterConfig;import org.apache.lucene.index.Term;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.Query;import org.apache.lucene.search.ScoreDoc;import org.apache.lucene.search.TermQuery;import org.apache.lucene.search.TopDocs;import org.apache.lucene.store.Directory;import org.apache.lucene.store.FSDirectory;import org.apache.lucene.util.Version;public class IndexFile {        String indexFile = null;        String sourceDir = null;        public IndexFile(String sourceDir, String indexFile){            this.sourceDir = sourceDir;            this.indexFile = indexFile;        }    public  void index() throws Exception {    //  RAMDirectory ramdirectory = new RAMDirectory(); //创建内存索引对象        Directory directory = FSDirectory.open(FileSystems.getDefault().getPath(this.indexFile)); //创建磁盘目录对象        Analyzer analyzer = new StandardAnalyzer();  //创建分词器        IndexWriterConfig writerConfig = new IndexWriterConfig(analyzer);  //创建索引写入对象控制        IndexWriter writer = new IndexWriter(directory, writerConfig); //创建写入对象        this.writeDocuments(writer); //将文档写入对象//      directory.close();    }    public void writeDocuments(IndexWriter writer) throws Exception{        File directory = new File(sourceDir);        File[] fileList = directory.listFiles();        for(int i = 0 ; i < fileList.length; i++){            String title = fileList[i].getName();            String content= this.readFile(fileList[i]);            System.out.println(content);            System.out.println(title);            Document doc = new Document();            doc.add(new Field("name", title, TextField.TYPE_STORED));            doc.add(new Field("address", this.indexFile, TextField.TYPE_STORED));            doc.add(new Field("thing", content, TextField.TYPE_STORED));            writer.addDocument(doc);            System.out.println("add one document");        }        writer.close();    }    public String readFile(File file) throws Exception{        BufferedReader br = null;        String content = null;        try{            br = new BufferedReader(new FileReader(file));            String line ;            while ( (line = br.readLine()) != null){                content += line;            }        }        finally{            if(br != null ){                br.close();            }        }        return content;    }    public void query(String queryStr) throws IOException, ParseException{        Directory directory = FSDirectory.open(FileSystems.getDefault().getPath(this.indexFile));        DirectoryReader directoryReader = DirectoryReader.open(directory);        IndexSearcher indexSearcher = new IndexSearcher(directoryReader);        Analyzer analyzer = new StandardAnalyzer();        QueryParser qp = new QueryParser("thing",  analyzer);        qp.setDefaultOperator(QueryParser.AND_OPERATOR);        Query query = qp.parse(queryStr);//      Term term = new Term("name", queryStr);//      Query query = new TermQuery(term);        TopDocs topDocs = indexSearcher.search(query, 10);        ScoreDoc[] scoreDocs = topDocs.scoreDocs;        System.out.println( "检索到" + topDocs.totalHits + "条记录。");        for( ScoreDoc scoreDoc : scoreDocs){            Document document = indexSearcher.doc(scoreDoc.doc);            System.out.println("title:" + document.getField("name").stringValue());            System.out.println("content:" + document.getField("thing").stringValue());        }        directory.close();    }    public static void main(String[] agrs) throws Exception{        String indexFileName  =  "/home/quincy1994/QA/LuceneIndex/data";        String sourceDir =  "./MovieList";        IndexFile indexFile = new IndexFile(sourceDir, indexFileName);//      indexFile.index();        System.out.println("nice!");        String queryStr = "大城小事讲的是什么";        indexFile.query(queryStr);    }}