Lucene日期排序及组合查询

public class SearchUtil {
	//索引所在文件夹
	private String indexDir;
	private String sDateStr;
	private String eDateStr;
	private RangeQuery rangeQuery;
	private Query query;
	private BooleanQuery booleanQuery,booleanQuery2;
	private DateFormat format = new SimpleDateFormat("yyyyMMdd");
	private Logger logger=Logger.getLogger(this.getClass());
	
	public List<Information> getSearchResult(String searchWhich,Set<Type> types,String key,Date sDate, Date eDate,int start,int limit) throws Exception{
		 booleanQuery = new BooleanQuery();
		 booleanQuery2=new BooleanQuery();
		 Iterator<Type> it=types.iterator();
		  
		 while(it.hasNext()){
			
			 Term t=new Term("informationTypeId",it.next().getId()+"");
			 Query typeQuery=new TermQuery(t);
			 booleanQuery2.add(typeQuery, BooleanClause.Occur.SHOULD);
		
		 }
			
		//获取记录数组
 	   List<Information> list=new ArrayList<Information>();
		Analyzer analyzer=new IKAnalyzer();
		//定义解析器
		QueryParser parser=new QueryParser(searchWhich,analyzer);
		//读入索引文件
		IndexReader reader=IndexReader.open(indexDir);
		//定义查询器
	    Searcher searcher=new IndexSearcher(reader);
	    //定义查询结果集，最多显示200条结果记录
	   // TopDocCollector topCollector=new TopDocCollector(200);
	    //若只有结束值起始值默认为1900年1月1日
	    if((sDate==null || "".equals(sDate))&&(eDate!=null && !"".equals(eDate))){
	    	Calendar calendar= Calendar.getInstance(); 
	    	calendar.set(1900, 1,1);
	    	sDate=calendar.getTime();
	    }
	    //若只有起始值结束值默认为当天
	    if((sDate!=null && !"".equals(sDate))&&(eDate==null||"".equals(eDate))){
	    	eDate=new Date();
	    }
	    if((sDate!=null && !"".equals(sDate))&&(eDate!=null||!"".equals(eDate))){
	    	
	    	//Lucene日期转换格式不准，改用format格式
	    	//sDateStr=DateTools.dateToString(sDate, DateTools.Resolution.MINUTE);
	        //eDateStr=DateTools.dateToString(eDate, DateTools.Resolution.MINUTE);
	    	sDateStr=format.format(sDate);
	    	eDateStr=format.format(eDate);
	    	
	        Term tstart=new Term("informationCreateDate",sDateStr);
	        Term tend=new Term("informationCreateDate",eDateStr);
		    rangeQuery= new RangeQuery(tstart,tend,true);	
	    }
	   
	    if(key!=null&&!"".equals(key)){
	    	 query=parser.parse(key);
	    }
	   
       if((sDate!=null && !"".equals(sDate))&&(eDate!=null && !"".equals(eDate))&&(key!=null) && !"".equals(key)){
    	   booleanQuery.add(booleanQuery2,BooleanClause.Occur.MUST);
            booleanQuery.add(rangeQuery, BooleanClause.Occur.MUST);
            booleanQuery.add(query,BooleanClause.Occur.MUST); 
       }else if((sDate!=null && !"".equals(sDate))&&(eDate!=null && !"".equals(eDate))){
    	   booleanQuery.add(booleanQuery2,BooleanClause.Occur.MUST);
            booleanQuery.add(rangeQuery, BooleanClause.Occur.MUST);
          
       }else if(key!=null && !"".equals(key)){      
    	   booleanQuery.add(booleanQuery2,BooleanClause.Occur.MUST);
           booleanQuery.add(query,BooleanClause.Occur.MUST);
    	   
       }else{
    	   booleanQuery.add(booleanQuery2,BooleanClause.Occur.MUST);
    	   booleanQuery.add(rangeQuery, BooleanClause.Occur.SHOULD);
           booleanQuery.add(query,BooleanClause.Occur.SHOULD); 
       }
       
       Sort sort = new Sort(new SortField("informationCreateDate",SortField.STRING,true));
      TopFieldDocs docs=searcher.search(booleanQuery, null, 200, sort);
     
             
       //执行查询操作
     //  searcher.search(booleanQuery, topCollector);
       //返回附带评分机制的结果集数组
    

       ScoreDoc[] scoreDocs=docs.scoreDocs;
       if(scoreDocs.length==0){
    	   System.out.println("没有符合条件的记录");
       }else{
    	   
		    	  for(int i=start;i<scoreDocs.length&&i<start+limit;i++){
		    		  //找到这个document原来的索引值
		    		  int docId=scoreDocs[i].doc;
		    		  //根据这个值找到对象的document
		    		  Document doc=searcher.doc(docId);
		    			Information info = new Information();
		    			String title = doc.get("informationTitle");
		    			String content = doc.get("informationContent");
		    			String source = doc.get("informationSource");
		    			String url = doc.get("informationUrl"); 
		    			String id = doc.get("informationId");
		    			String date = doc.get("informationCreateDate");
		    			// 高亮
		    			SimpleHTMLFormatter sHtmlF = new SimpleHTMLFormatter("<span style='background-color:yellow'>", "</span>");
		    			Highlighter highlighter=null;
		    			String titleFragment=null;
		    			String contentFragment=null;
		    			if(query!=null){
		    				
				    			highlighter = new Highlighter(sHtmlF, new QueryScorer(query)); 
				    			
				    			// 设置高亮附近的字数
				    			highlighter.setTextFragmenter(new SimpleFragmenter(200));
				    			
				    			// 标题
				    			titleFragment = highlighter.getBestFragment(analyzer,"title", title);
				    			
				    		 contentFragment= highlighter.getBestFragment(analyzer, searchWhich, content);
				    			
		    			}
		    			if(titleFragment != null && !titleFragment.trim().equals("")) {

		    				info.setTitle(titleFragment);
		    				
		    			}else{
		    				info.setTitle(title);
		    			
		    			}
		    			
		    			if(contentFragment!=null&&!contentFragment.trim().equals("")){
		    				info.setContent(contentFragment);
		    			}else{
		    				info.setContent(content);
		    			}
		    		
		    			info.setSource(source);
		    			info.setUrl(url);
		    			info.setCreateDate(DateUtil.getDate(date, "yyyyMMdd")); 
		    			info.setId(new Integer(id));
		    			
		    			list.add(info);
		    		   
		    	  }
    	   
       }//else
       logger.debug("search:" + list.size());
		  return list;
	}
       
}