Lucene4.3.1实例

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

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.cn.smart.SmartChineseAnalyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
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.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;

public class LuceneStudy {
	    private String dataSourceFile = "D:\\test\\txt";
	    private File indexFile=new File("D:\\test\\luceneIndex");
	    private Analyzer analyzer = new SmartChineseAnalyzer(Version.LUCENE_43,true);  
	    private String[] queryString={"filepath","content"};  
	    
	    public void createIndex() throws IOException {  
	       Directory directory = FSDirectory.open(indexFile);  
	       IndexWriterConfig indexWriterConfig = new IndexWriterConfig(Version.LUCENE_43, analyzer);  
	        indexWriterConfig.setOpenMode(IndexWriterConfig.OpenMode.CREATE); 
	        IndexWriter writer = new IndexWriter(directory, indexWriterConfig);  
	  
	        File[] files = new File(dataSourceFile).listFiles();  
	        if (files.length > 0) {  
	            long time1 = System.currentTimeMillis();  
	            for (int i = 0; i < files.length; i++) {  
	                Document document = new Document(); 
	                String content = getTXT(files[i], "GBK");
	                document.add(new Field("content", content, Field.Store.YES, Field.Index.ANALYZED));
	                document.add(new Field("filepath", files[i].getName(), Field.Store.YES, Field.Index.ANALYZED));  
	                writer.addDocument(document);  
	            }  
	            long time2 = System.currentTimeMillis();  
	            System.out.println("创建了" + writer.numDocs() + "索引");    
                System.out.println("一共花了" + (time2 - time1) + "时间"); 
	        }  	  
	        writer.close();  
	    }  
	    
	    public void nocnIndex() throws IOException {  
		       Directory directory = FSDirectory.open(indexFile);  
		       Analyzer ana = new StandardAnalyzer(Version.LUCENE_43);
		       IndexWriterConfig indexWriterConfig = new IndexWriterConfig(Version.LUCENE_43, ana);  
		        indexWriterConfig.setOpenMode(IndexWriterConfig.OpenMode.CREATE); 
		        IndexWriter writer = new IndexWriter(directory, indexWriterConfig);  
		  
		        File[] files = new File(dataSourceFile).listFiles();  
		        if (files.length > 0) {  
		            long time1 = System.currentTimeMillis();  
		            for (int i = 0; i < files.length; i++) {  
		                Document document = new Document(); 
		                String content = getTXT(files[i], "GBK");
		                document.add(new Field("content", content, Field.Store.YES, Field.Index.ANALYZED));
		                document.add(new Field("filepath", files[i].getName(), Field.Store.YES, Field.Index.ANALYZED));  
		                writer.addDocument(document);  
		            }  
		            long time2 = System.currentTimeMillis();  
		            System.out.println("创建了" + writer.numDocs() + "索引");    
	                System.out.println("一共花了" + (time2 - time1) + "时间"); 
		        }  	  
		        writer.close();  
		    }
	    
	    public void search() throws IOException {  
	    	IndexReader reader = DirectoryReader.open(FSDirectory.open(indexFile));		
		    IndexSearcher indexSearcher = new IndexSearcher(reader);
	        QueryParser queryParser = new MultiFieldQueryParser(Version.LUCENE_43, queryString, analyzer);  
	        Query query = null;
			try {
				query = queryParser.parse("人"); 
			} catch (ParseException e) {
				e.printStackTrace();
			}  
	        TopDocs topDocs = indexSearcher.search(query, 10000);  
	        System.out.println("一共查到:" + topDocs.totalHits + "记录");
	        ScoreDoc[] scoreDoc = topDocs.scoreDocs;  
	  
	        for (int i = 0; i < scoreDoc.length; i++) {  
	            int doc = scoreDoc[i].doc;  
	            System.out.println("内部编号:" + doc);
	            Document mydoc = indexSearcher.doc(doc);  
	            System.out.println("文档路径:" + mydoc.get("filepath")); 
	        }  
	    }  
	    
	    public static String getTXT(File file, String charset) throws IOException { 
			BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(file), charset));     
		    String line = new String();     
		    String temp = new String();                  
		    while ((line = reader.readLine()) != null) {  
		    	temp += line;     
		    }     
		    reader.close();     
		    return temp;     
		}
	  
	    public static void main(String[] args) throws IOException {
	    	LuceneStudy ls = new LuceneStudy();
	    	//ls.createIndex();
	    	ls.nocnIndex();
	    	ls.search();
	    }
	}