applicationsearcher.java

一个很好的开源项目管理系统源代码

package net.java.workeffort.webapp.support;

import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import net.java.workeffort.searchengine.CustomQueryParser;
import net.java.workeffort.service.domain.PageResult;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Searcher;
import org.apache.lucene.store.FSDirectory;
import org.springframework.context.ApplicationContext;
import org.springframework.core.io.Resource;

/**
 * Application help searcher using Lucene
 * @author Antony Joseph
 */
public class ApplicationSearcher {

    private ApplicationContext context;

    public ApplicationSearcher(ApplicationContext context) {
        this.context = context;
    }

    public List search(HelpSearchQuery query) {
        List list = new ArrayList();

        // if no query entered return empty list.
        if (query.getQuery() == null || query.getQuery().length() == 0) {
           return list;
        }

        try {
            Resource resource = context.getResource("classpath:searchindex");
            File indexDir = resource.getFile();

            Searcher searcher = new IndexSearcher(FSDirectory.getDirectory(
                    indexDir, false));
            String[] fields = { "title", "body" };
            Hits hits = searcher.search(CustomQueryParser.parse(query
                    .getQuery(), fields, new StandardAnalyzer()));

            for (int i=0; i < hits.length(); i++) {
                Document doc = hits.doc(i);
                Map map = new HashMap();
                map.put("path", doc.get("path"));
                map.put("title", doc.get("title"));
                map.put("body", doc.get("body"));
                list.add(map);
                // System.out.println("title=" + doc.get("title") + "\n body="
                //         + doc.get("body") + "\n path=" + doc.get("path"));

            }
        }
        catch (Exception e) {
            throw new RuntimeException("Exception in  search()", e);
        }
       return list;
    }

}