Lucene

package com.util.search;

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

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.document.DateTools;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
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.TopScoreDocCollector;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.SimpleFSDirectory;
import org.directwebremoting.WebContext;
import org.directwebremoting.WebContextFactory;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.wltea.analyzer.lucene.IKAnalyzer;
import org.wltea.analyzer.lucene.IKQueryParser;
import org.wltea.analyzer.lucene.IKSimilarity;

public class CaseSearch {

private static String indexDir = "c:\\lucene\\index";

private static String fileDir = "c:\\lucene\\files" ;

private static String content = "content";

private static String filename = "filename";

private static String indexdate = "indexdate";

public WebContext ctxCase = WebContextFactory.get();

protected Object getBeanDwr(String id) {
WebApplicationContext ctx = WebApplicationContextUtils
.getWebApplicationContext(ctxCase.getServletContext());

return ctx.getBean(id);
}
public static void  createIndex() throws IOException{

IndexWriter indexWriter = null;
Analyzer analyzer = new IKAnalyzer();
Directory dir = new SimpleFSDirectory(new File(indexDir));
//FSDirectory.open(new File(indexDir));
indexWriter =new IndexWriter(dir, analyzer, true ,
IndexWriter.MaxFieldLength.LIMITED);;

File[] files = new File(fileDir).listFiles();  
System.out.println(files.length);
for (int i = 0; i < files.length; i++) {  
Document doc = new Document();  
//创建Field对象，并放入doc对象中  
doc.add(new Field(content, new FileReader(files[i])));   
doc.add(new Field(filename, files[i].getName(),Field.Store.YES, Field.Index.NOT_ANALYZED));
doc.add(new Field(indexdate,DateTools.dateToString(new Date(), DateTools.Resolution.DAY),Field.Store.YES,Field.Index.NOT_ANALYZED));  
//写入IndexWriter  
indexWriter.addDocument(doc);  
}  
indexWriter.close();
}

public static void search(String[] fields,String keyword) throws IOException{

//String[] fields = field.split(",");
IndexSearcher isearcher = null;

IKSimilarity iKSimilarity = new IKSimilarity();

Directory dir = new SimpleFSDirectory(new File(indexDir));

IndexReader indexReader = IndexReader.open(dir, true);

isearcher = new IndexSearcher(indexReader);

Analyzer analyzer = new IKAnalyzer();

isearcher.setSimilarity(iKSimilarity);

//QueryParser parser = new QueryParser(Version.LUCENE_30,field,analyzer);

Query query = IKQueryParser.parseMultiField(fields, keyword);

TopScoreDocCollector collector = TopScoreDocCollector.create(3, false);

isearcher.search(query, collector);

//TopDocs topDocs = isearcher.search(query , 5);

TopDocs topDocs = collector.topDocs();

ScoreDoc[] scoreDocs = topDocs.scoreDocs;

for (int i = 0; i < scoreDocs.length; i++) {
Document doc = isearcher.doc(scoreDocs[i].doc);
System.out.println(doc.getField(filename));
System.out.println("weight:" + (isearcher.explain(query, scoreDocs[i].doc)).getValue());
}
}
}