Lucene详解

代码语言：javascript复制

package com.lucene.entity; 
 public class Ans { 
public final static String LUCENE_PATH="/WEB-INF/lucene"; 
private String name; 
private String content; 
public String getName() { 
return name; 
} 
public void setName(String name) { 
this.name = name; 
} 
public String getContent() { 
return content; 
} 
public void setContent(String content) { 
this.content = content; 
} 
}
package com.lucene;
 
 
 import javax.servlet.http.HttpServletRequest;
 
 
 import com.lucene.entity.Ans;
 
 
 public interface Content {
 public  boolean saveConten(Ans ans,String path);
 public String getConet(String name,String path);
 
 
 }
 
package com.lucene.impl;
 
 
 import java.io.File;
 import java.io.IOException;
 import java.io.Reader;
 
 
 import javax.servlet.ServletContext;
 import javax.servlet.http.HttpServletRequest;
 
 import org.apache.lucene.analysis.Analyzer;
 import org.apache.lucene.analysis.TokenStream;
 import org.apache.lucene.analysis.standard.StandardAnalyzer;
 import org.apache.lucene.document.Document;
 import org.apache.lucene.document.Field;
 import org.apache.lucene.document.Field.Index;
 import org.apache.lucene.document.Field.Store;
 import org.apache.lucene.index.IndexReader;
 import org.apache.lucene.index.IndexWriter;
 import org.apache.lucene.queryParser.ParseException;
 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.TopDocs;
 import org.apache.lucene.store.Directory;
 import org.apache.lucene.store.SimpleFSDirectory;
 import org.apache.lucene.util.Version;
 import org.wltea.analyzer.lucene.IKAnalyzer;
 import org.wltea.analyzer.lucene.IKTokenizer;
 
 
 import com.lucene.Content;
 import com.lucene.entity.Ans;
 
 
 public class ContentImpl implements Content{
 
 
 @Override
 public boolean saveConten(Ans ans,String path) {
 
 try {
 Directory dir=new SimpleFSDirectory(new File(path));
 boolean exits=IndexReader.indexExists(dir);
 IKAnalyzer analyzer=new IKAnalyzer(true);
 IndexWriter writer=new IndexWriter(dir, new StandardAnalyzer(Version.LUCENE_30), !exits, IndexWriter.MaxFieldLength.LIMITED);
 //IndexWriter writer=new IndexWriter(dir, analyzer, !exits, IndexWriter.MaxFieldLength.LIMITED);
 Document doc=new Document();
 /**
 * Field.Store.YES表示存储field
 * Field.Index.ANALYZED 进行分词
 */
 doc.add(new Field("name",ans.getName(),Field.Store.YES,Field.Index.ANALYZED));
 doc.add(new Field("content",ans.getContent(),Field.Store.YES,Field.Index.ANALYZED));
 writer.addDocument(doc);
 System.out.println(writer.numDocs());
 writer.optimize();
 writer.close();
 return true;
 } catch (IOException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 return false;
 }
 
 }
 
 
 @Override
 public String getConet(String name,String path) {
 try {
 Directory dir=new SimpleFSDirectory(new File(path));
 IndexReader reader=IndexReader.open(dir);
 IndexSearcher searcher=new IndexSearcher(reader);
 
 IKAnalyzer analyzer=new IKAnalyzer(true);
 //searcher.setSimilarity(new IKTokenizer(null, false));
 QueryParser query=new QueryParser(Version.LUCENE_30, "name", new StandardAnalyzer(Version.LUCENE_30));
 //QueryParser query=new QueryParser(Version.LUCENE_30, "name", analyzer);
 Query q=query.parse(name);
 TopDocs docs=searcher.search(q, 10);
 ScoreDoc[] hits = docs.scoreDocs;
 System.out.println(hits.length);
 /*for(ScoreDoc doc:hits){
 Document document=searcher.doc(doc.doc);
 System.out.println(document);
 System.out.println(document.getField("name") "==========" document.getField("content"));
 }*/
 for(int i=0;i
 Document document=searcher.doc(hits[i].doc);
 //System.out.println(document.getValues("name") "" document.ge);
 System.out.println(document.getField("name").stringValue() "==========" document.getField("content").stringValue());
 }
 } catch (IOException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 } catch (ParseException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 return null;
 }
 
 }
 

 
 
 
 import javax.servlet.http.HttpServletRequest;
 
 
 import com.lucene.Content;
 import com.lucene.entity.Ans;
 import com.lucene.impl.ContentImpl;
 
 
 public class LuceneTest {
 
 
 public static void main(String[] args) {
 // TODO Auto-generated method stub
 Ans ans=new Ans();
 ans.setName("上星期我在哪里？");
 ans.setContent("上个星期我在广东...");
 //ans.setName("hello");
 //ans.setContent("welcome to here");
 Content content=new ContentImpl();
 LuceneTest test=new LuceneTest();
 String path=test.getLucenePath();
 //content.saveConten(ans,path);
 content.getConet("我在哪里啊？？？", path);
 }
 public String getLucenePath(){
 //String path=request.getSession().getServletContext().getRealPath(Ans.LUCENE_PATH);
 String root=this.getClass().getResource("").getPath();
 String path=root.substring(0, root.indexOf("classes")) "luceneData";
 System.out.println("The lucene's file save path is: " path);
 return path;
 }
 }
 

lucene

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