www.pudn.com > java_search_engineer_develop.rar > SearchManager.java

package sample.dw.paper.lucene.search; 
 
import java.io.IOException; 
import java.util.ArrayList; 
import java.util.List; 
 
import org.apache.lucene.analysis.Analyzer; 
import org.apache.lucene.analysis.standard.StandardAnalyzer; 
import org.apache.lucene.queryParser.ParseException; 
import org.apache.lucene.queryParser.QueryParser; 
import org.apache.lucene.search.Hits; 
import org.apache.lucene.search.IndexSearcher; 
import org.apache.lucene.search.Query; 
 
import sample.dw.paper.lucene.index.IndexManager; 
 
/** 
 * This class is used to search the  
 * Lucene index and return search results 
 */ 
public class SearchManager { 
	 
    private String searchWord; 
     
    private IndexManager indexManager; 
     
    private Analyzer analyzer; 
     
    public SearchManager(String searchWord){ 
    	this.searchWord   =  searchWord; 
    	this.indexManager =  new IndexManager(); 
    	this.analyzer     =  new StandardAnalyzer(); 
    } 
     
    /** 
     * do search 
     */ 
    public List search(){ 
    	List searchResult = new ArrayList(); 
    	if(false == indexManager.ifIndexExist()){ 
    		try { 
				if(false == indexManager.createIndex()){ 
					return searchResult; 
				} 
			} catch (IOException e) { 
				e.printStackTrace(); 
				return searchResult; 
			} 
    	} 
    	 
    	IndexSearcher indexSearcher = null; 
    	 
    	try{ 
    		indexSearcher = new IndexSearcher(indexManager.getIndexDir()); 
    	}catch(IOException ioe){ 
    		ioe.printStackTrace(); 
    	} 
         
    	QueryParser queryParser = new QueryParser("content",analyzer); 
    	Query query = null; 
    	try { 
			query = queryParser.parse(searchWord); 
		} catch (ParseException e) { 
			e.printStackTrace(); 
		} 
		if(null != query && null != indexSearcher){			 
			try { 
				Hits hits = indexSearcher.search(query); 
				for(int i = 0; i < hits.length(); i ++){ 
					SearchResultBean resultBean = new SearchResultBean(); 
					resultBean.setHtmlPath(hits.doc(i).get("path")); 
					resultBean.setHtmlTitle(hits.doc(i).get("title")); 
					searchResult.add(resultBean); 
				} 
			} catch (IOException e) { 
				e.printStackTrace(); 
			} 
		} 
    	return searchResult; 
    } 
}