分页检索及完善站内搜索

	public static final int pageSize = 5; //每页显示多少条记录
	private int pageNum;//当前页码
	private int totalPageSize;//总页数

 

/**
	 * 通过关键词 得到结果
	 */

	public void searchIndex(String path, String keywords) throws Exception {
		long startTime = new Date().getTime();
		 
		
		FSDirectory directory = FSDirectory.open(new File(path));
		IndexReader reader = IndexReader.open(directory);

		Searcher searcher = new IndexSearcher(directory);

		// MultiFieldQueryParser.parse中的参数分别为:
		// 1.关键词
		// 2.要查询的字段,字符串类型的数组
		String[] field = { "article_title", "article_content" };
		// 3.两个字段的关系（与或非）
		BooleanClause.Occur[] flags = new BooleanClause.Occur[] {
				BooleanClause.Occur.SHOULD, BooleanClause.Occur.SHOULD };
		// 4.指明分词的时候所用的分词器
		Analyzer analyzer = new IKAnalyzer();
		// Query query = MultiFieldQueryParser.parse(keywords, field, flags,
		// analyzer);
		Query query = MultiFieldQueryParser.parse(Version.LUCENE_30, keywords,
				field, flags, analyzer);
		// 由于我们目前使用的查询是多字段查询，需要匹配度的排序
		// QueryScorer内置计分器
		query.rewrite(reader);// 用于重写query对象，目的能够让计分器识别当前的query.

		// 获得结果集
		// Hits hits = searcher.search(query);
		TopFieldCollector tc = TopFieldCollector.create(Sort.INDEXORDER, 20000, false, false, false, false);
		//TopDocs hits = searcher.search(query,20000);
		searcher.search(query, tc);
		if(pageNum > 0 ){
			pageNum -= 1;
		}
		TopDocs hits = tc.topDocs(pageNum * pageSize);
		
		this.maxResultSize = String.valueOf(tc.getTotalHits());
		if(tc.getTotalHits()%this.pageSize == 0){
			this.totalPageSize = tc.getTotalHits()/this.pageSize;
		}else{
			this.totalPageSize = tc.getTotalHits()/this.pageSize + 1;
		}
		
		for (int i = 0; i < hits.scoreDocs.length&&i < this.pageSize ; i++) {

			ScoreDoc sdoc = hits.scoreDocs[i];
			Document doc = searcher.doc(sdoc.doc);
			Article article = new Article();
			article.setId(Integer.valueOf(doc.get("id")));
			article.setIsCreate(String.valueOf(doc.get("isCreate")).toCharArray()[0]);
			// title
			String title = doc.get("article_title");
			// content
			String content = doc.get("article_content");
			// 以上两项需要加亮

			// Highlighter的构造函数中需要添加两个参数
			// 1.高亮文字的格式(这个格式是基于html)
			SimpleHTMLFormatter simpleHTMLFOrmatter = new SimpleHTMLFormatter(
					"<font color=red>", "</font>");
			// 2.计分器
			Highlighter highlighter = new Highlighter(simpleHTMLFOrmatter,
					new QueryScorer(query));

			// 关键字附近字符串的截取,截取120个字
			Fragmenter fragmenter = new SimpleFragmenter(120);
			highlighter.setTextFragmenter(fragmenter);

			// 针对某个字段的加亮以及截取
			TokenStream tokenStream = analyzer.tokenStream("article_content",
					new StringReader(content));
			// 将加亮并截取的字符串取出来
			String highLightText = highlighter.getBestFragment(tokenStream,
					content);

			article.setArticleContent(highLightText);

			// 针对某个字段的加亮以及截取
			TokenStream title_tokenStream = analyzer.tokenStream(
					"article_title", new StringReader(title));
			// 将加亮并截取的字符串取出来
			String title_highLightText = highlighter.getBestFragment(
					title_tokenStream, title);
			article.setArticleTitle(title_highLightText);

			searcheResult.add(article);
		}
		reader.close();
			}

 

   <s:bean name="org.apache.struts2.util.Counter" id="counter">
		<s:param name="first" value="1"/>
		<s:param name="last" value="#request.totalPageSize"/>
			<s:iterator>
				<span style="cursor:pointer;color:blue;" onclick="submitForm('${current - 1}')"><u>[${current - 1}]</u></span>
			</s:iterator>
   </s:bean>

 

 

给 标题和正文加连接

<s:iterator value="#request.searcheResult" id="article">
		<a href="${article.id}_${article.isCreate}.html" target="_blank">${article.articleTitle}</a><br/>
		${article.articleContent}...
		<br/><br/><br/>
	</s:iterator>