IKAnalyzerDemo 全文检索及分词实例

/**  
 * IK Analyzer Demo  
 * @param args  
 */  
import java.io.File;
import java.io.IOException;
import java.io.StringReader;
import java.util.List;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
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.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.store.RAMDirectory;
import org.wltea.analyzer.IKSegmentation;
import org.wltea.analyzer.Lexeme;
import org.wltea.analyzer.lucene.IKAnalyzer;
import org.wltea.analyzer.lucene.IKQueryParser;
import org.wltea.analyzer.lucene.IKSimilarity;

import cn.jh.db.jdbc.DBO;
import cn.jh.db.jdbc.DBOManager;
  
/**  
 * @author linly  
 *  
 */  
public class IKAnalyzerDemo {   
	  static final File INDEX_DIR = new File("index");
	  static void test() throws Exception{
		 String fieldName = "text";   
         //检索内容   
        IndexWriter iwriter = null;  
	
		RAMDirectory ramDir  =   new  RAMDirectory();
		IKAnalyzer ika=new IKAnalyzer();
		
	
	
		
		  DBO newsdbo = DBOManager.createDBO("CMS34");
		  {
			iwriter=new IndexWriter(ramDir, ika, true , IndexWriter.MaxFieldLength.LIMITED);   
		    IndexWriter fileWriter = new IndexWriter(FSDirectory.open(INDEX_DIR),ika, true, IndexWriter.MaxFieldLength.LIMITED);
			fileWriter.addIndexesNoOptimize(new Directory[]{ramDir});   
			
			  Document doc = new Document(); 
		      doc.add(new Field(fieldName, "1234", Field.Store.YES, Field.Index.ANALYZED));   
	          iwriter.addDocument(doc); 
	          iwriter.commit();
	          iwriter.close();
			fileWriter.commit();  
			fileWriter.close();  
		  }
		  for(int i=0;i<1;i++){
			  iwriter = new IndexWriter(ramDir, ika, false , IndexWriter.MaxFieldLength.LIMITED);   
			  int m=1000*i;
			System.out.println("select Title from News_tab order by newsId desc  limit "+m+", 1000 ");
			  List<String> titles =  newsdbo.getObjList("select Title from News_tab limit "+m+", 5000 ", String.class);
			  for(String t:titles){
				  Document doc = new Document(); 
			      doc.add(new Field(fieldName, t, Field.Store.YES, Field.Index.ANALYZED));   
		          iwriter.addDocument(doc);   
			  }
			    iwriter.close();
			    
			    
			    IndexWriter fileWriter = new IndexWriter(FSDirectory.open(INDEX_DIR),ika, false, IndexWriter.MaxFieldLength.LIMITED);
				fileWriter.addIndexesNoOptimize(new Directory[]{ramDir});   
				//  =   new  IndexWriter(ramDir, ika, true );
				fileWriter.commit();  
				fileWriter.close();  
			    
		  }
      
          
	

	

		
	}
	  static void test2() throws Exception{
		  
		  
			IKAnalyzer ika=new IKAnalyzer();
		  RAMDirectory directory = null;   
     
        IndexSearcher isearcher = null;   
    
            //建立内存索引对象   
        

          
          IndexWriter iwriter = null;  
		
		  //实例化搜索器      
//		   
//		    directory = new RAMDirectory();     
//		    iwriter = new IndexWriter(directory, ika, true , IndexWriter.MaxFieldLength.LIMITED);   
//		    iwriter.addIndexesNoOptimize(new Directory[]{FSDirectory.open(INDEX_DIR)});
//		    iwriter.close();
		    
		    isearcher = new IndexSearcher(FSDirectory.open(INDEX_DIR));  
		    
		    //在索引器中使用IKSimilarity相似度评估器   
          isearcher.setSimilarity(new IKSimilarity());   
          
          String keyword = "铲除网上黄毒需法律亮剑"; 
          
          IKSegmentation ikSeg = new IKSegmentation(new StringReader(keyword),
  				true);
          keyword="";
	  		try {
	  			Lexeme l = null;
	  			while ((l = ikSeg.next()) != null) {
	  				if (l.getLexemeType() == 0){
	  					System.out.println(l.getLexemeText());
	  					keyword+=l.getLexemeText()+" ";
	  				}
	  				
	  			}
	  		} catch (IOException e) {
	  			e.printStackTrace();
	  		}
	          String fieldName = "text"; 
          //使用IKQueryParser查询分析器构造Query对象   
          Query query = IKQueryParser.parse(fieldName, keyword);   
             
          //搜索相似度最高的5条记录   
          int max=20;
          TopDocs topDocs = isearcher.search(query , max);   
          System.out.println("命中：" + topDocs.totalHits);   
          //输出结果   
          ScoreDoc[] scoreDocs = topDocs.scoreDocs;   
          for (int i = 0; i < topDocs.totalHits&&i<max; i++){   
              Document targetDoc = isearcher.doc(scoreDocs[i].doc);   
              System.out.println("内容：" + targetDoc.toString()+"\t\t"+targetDoc);   
          }              
             
		 

			
		}
    public static void main(String[] args) throws Exception{ 
     	test();
    	test2();
    	
//    	test2();
//    	test();
//    	test2();
//    	test();
//    	test2();
//    	test();
//    	test2();

    }   
}