Lucene自带示例精简

Lucene自带示例精简，只留下了主要代码。以备查看
对文件夹生成索引

 package  zhch.illq.lucene;

 import  java.io.File;
 import  java.io.FileReader;
 import  java.io.IOException;

 import  net.paoding.analysis.analyzer.PaodingAnalyzer;

 import  org.apache.lucene.analysis.standard.StandardAnalyzer;
 import  org.apache.lucene.document.DateTools;
 import  org.apache.lucene.document.Document;
 import  org.apache.lucene.document.Field;
 import  org.apache.lucene.index.IndexWriter;
 import  org.apache.lucene.store.FSDirectory;
 import  org.apache.lucene.util.Version;

 public   class  LuceneIndex {

     static   final  File INDEX_DIR =  new  File( "d:\\temp\\index" );

     // 主要代码 索引docDir文件夹下文档，索引文件在INDEX_DIR文件夹中
     public   static   void  main(String[] args) {
         File docDir = new  File( "d:\\temp\\neirong" );
         try  {
             IndexWriter standardWriter = new  IndexWriter(FSDirectory.open(INDEX_DIR),  new  StandardAnalyzer(
                     Version.LUCENE_CURRENT), true , IndexWriter.MaxFieldLength.LIMITED);
             // 如果是索引中文内容，可以使用Paoding中文分词器
             IndexWriter writer = new  IndexWriter(FSDirectory.open(INDEX_DIR),  new  PaodingAnalyzer(),  true ,
                     IndexWriter.MaxFieldLength.LIMITED);
             String[] files = docDir.list();
             for  (String fileStr : files) {
                 File file = new  File(docDir, fileStr);
                 if  (!file.isDirectory()) {
                     writer.addDocument(document(file));
                 }
             }
             writer.optimize();
             writer.close();

         } catch  (IOException e) {
             System.out.println(" caught a "  + e.getClass() +  "\n with message: "  + e.getMessage());
         }
     }

     public   static  Document document(File f)  throws  java.io.FileNotFoundException {

         Document doc = new  Document();

         // 添加path,索引（可查询）但不切词
         doc.add(new  Field( "path" , f.getPath(), Field.Store.YES, Field.Index.NOT_ANALYZED));

         // 添加最后修改日期
         doc.add(new  Field( "modified" , DateTools.timeToString(f.lastModified(), DateTools.Resolution.MINUTE),
                 Field.Store.YES, Field.Index.NOT_ANALYZED));

         // 添加内容，指定一个Reader，文件内容解析但不存储，这里的Reader使用系统默认的编码读入
         doc.add(new  Field( "contents" ,  new  FileReader(f)));
         return  doc;
     }
 }

对索引进行查询

 package  zhch.illq.lucene;

 import  java.io.BufferedReader;
 import  java.io.File;
 import  java.io.IOException;
 import  java.io.InputStreamReader;

 import  net.paoding.analysis.analyzer.PaodingAnalyzer;

 import  org.apache.lucene.analysis.Analyzer;
 import  org.apache.lucene.analysis.standard.StandardAnalyzer;
 import  org.apache.lucene.document.Document;
 import  org.apache.lucene.index.IndexReader;
 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.Searcher;
 import  org.apache.lucene.search.TopScoreDocCollector;
 import  org.apache.lucene.store.FSDirectory;
 import  org.apache.lucene.util.Version;

 public   class  LuceneSearch {

     /** Simple command-line based search demo. */
     public   static   void  main(String[] args)  throws  Exception {

         String index = "d:\\temp\\index" ;
         String field = "contents" ;
         String queries = null ;
         boolean  raw =  false ;
         // 要显示条数
         int  hitsPerPage =  10 ;

         // searching, so read-only=true
         IndexReader reader = IndexReader.open(FSDirectory.open(new  File(index)),  true );  // only

         Searcher searcher = new  IndexSearcher(reader);
         Analyzer standardAnalyzer = new  StandardAnalyzer(Version.LUCENE_CURRENT);
         // 如果是索引中文内容，可以使用Paoding中文分词器
         Analyzer analyzer = new  PaodingAnalyzer();

         BufferedReader in = new  BufferedReader( new  InputStreamReader(System.in));
         QueryParser parser = new  QueryParser(field, analyzer);
         while  ( true ) {
             if  (queries ==  null )  // prompt the user
                 System.out.println("Enter query: " );

             String line = in.readLine();

             if  (line ==  null  || line.length() == - 1 )
                 break ;

             line = line.trim();
             if  (line.length() ==  0 )
                 break ;

             Query query = parser.parse(line);
             System.out.println("Searching for: "  + query.toString(field));

             doPagingSearch(in, searcher, query, hitsPerPage, raw, queries == null );
         }
         reader.close();
     }

     public   static   void  doPagingSearch(BufferedReader in, Searcher searcher, Query query,  int  hitsPerPage,  boolean  raw,
             boolean  interactive)  throws  IOException {

         TopScoreDocCollector collector = TopScoreDocCollector.create(hitsPerPage, false );
         searcher.search(query, collector);
         ScoreDoc[] hits = collector.topDocs().scoreDocs;

         int  end, numTotalHits = collector.getTotalHits();
         System.out.println(numTotalHits + " total matching documents" );

         int  start =  0 ;

         end = Math.min(hits.length, start + hitsPerPage);

         for  ( int  i = start; i < end; i++) {
             Document doc = searcher.doc(hits[i].doc);
             String path = doc.get("path" );
             if  (path !=  null ) {
                 System.out.println((i + 1 ) +  ". "  + path);
                 System.out.println("   modified: "  + doc.get( "modified" ));

             } else  {
                 System.out.println((i + 1 ) +  ". "  +  "No path for this document" );
             }

         }

     }

 }