lucene3.0 分页显示与高亮显示

分页类

 

package com.cee.com;

import java.util.List;

//分页类
public class PageBean {

	private List list; // 要返回的某一页的记录列表
	private int allRow; // 总记录数
	private int totalPage; // 总页数
	private int currentPage; // 当前页
	private int pageSize; // 每页记录数
	private int offset;

	public int getOffset() {
		return offset;
	}

	public void setOffset(int offset) {
		this.offset = offset;
	}

	private boolean isFirstPage; // 是否为第一页
	private boolean isLastPage; // 是否为最后一页
	private boolean hasPreviousPage; // 是否有前一页
	private boolean hasNextPage; // 是否有下一页

	public List getList() {
		return list;
	}

	public void setList(List list) {
		this.list = list;
	}

	public int getAllRow() {
		return allRow;
	}

	public void setAllRow(int allRow) {
		this.allRow = allRow;
	}

	public int getTotalPage() {
		int totalPage = allRow % pageSize == 0 ? allRow / pageSize : allRow
				/ pageSize + 1;
		return totalPage;
	}

	public void setTotalPage(int totalPage) {
		this.totalPage = totalPage;
	}

	public int getCurrentPage() {
		return currentPage;
	}

	public void setCurrentPage(int currentPage) {
		this.currentPage = currentPage;
	}

	public int getPageSize() {
		return pageSize;
	}

	public void setPageSize(int pageSize) {
		this.pageSize = pageSize;
	}

	/** */
	/**
	 * 初始化分页信息
	 */
	public void init() {
		this.isFirstPage = isFirstPage();
		this.isLastPage = isLastPage();
		this.hasPreviousPage = isHasPreviousPage();
		this.hasNextPage = isHasNextPage();
	}

	/** */
	/**
	 * 以下判断页的信息,只需getter方法(is方法)即可
	 * 
	 * @return
	 */

	public boolean isFirstPage() {
		return currentPage == 1; // 如是当前页是第1页
	}

	public boolean isLastPage() {
		return currentPage == totalPage; // 如果当前页是最后一页
	}

	public boolean isHasPreviousPage() {
		return currentPage != 1; // 只要当前页不是第1页
	}

	public boolean isHasNextPage() {
  if(totalPage==0){
   return false;
  }else{
   return currentPage != totalPage; // 只要当前页不是最后1页
  }
  
 }	/** */
	/**
	 * 计算总页数,静态方法,供外部直接通过类名调用
	 * 
	 * @param pageSize
	 *            每页记录数
	 * @param allRow
	 *            总记录数
	 * @return 总页数
	 */
	public static int countTotalPage(final int pageSize, final int allRow) {
		int totalPage = allRow % pageSize == 0 ? allRow / pageSize : allRow
				/ pageSize + 1;
		return totalPage;
	}

	/** */
	/**
	 * 计算当前页开始记录
	 * 
	 * @param pageSize
	 *            每页记录数
	 * @param currentPage
	 *            当前第几页
	 * @return 当前页开始记录号
	 */
	public static int countOffset(final int pageSize, final int currentPage) {
		final int offset = pageSize * (currentPage - 1);
		return offset;
	}

	/** */
	/**
	 * 计算当前页,若为0或者请求的URL中没有"?page=",则用1代替
	 * 
	 * @param page
	 *            传入的参数(可能为空,即0,则返回1)
	 * @return 当前页
	 */
	public static int countCurrentPage(int page) {
		final int curPage = (page == 0 ? 1 : page);
		return curPage;
	}

	public static int lastSqlIdx(int rowStartIdx, int pageSize) {
		return rowStartIdx + pageSize;
	}
}

 

 分页代码与高亮代码

 

  注意 indexDir 目录下存放的是 lucene 的索引， 直接运行代码会发生错误，请看上篇文章生成索引

 

package com.cee.test;

import java.io.File;
import java.io.IOException;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.queryParser.MultiFieldQueryParser;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.Searcher;
import org.apache.lucene.search.TopScoreDocCollector;
import org.apache.lucene.search.highlight.Highlighter;
import org.apache.lucene.search.highlight.InvalidTokenOffsetsException;
import org.apache.lucene.search.highlight.QueryScorer;
import org.apache.lucene.search.highlight.SimpleHTMLFormatter;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;

import com.cee.com.PageBean;

/**
 * 分页与高亮显示
 * 
 * @author qcy
 * 
 */
public class PageSearcher {

	/**
	 * 
	 * @param pageNo
	 * @param pageSize
	 * @param q
	 *            表示查询条件
	 * @return
	 */
	public final static String indexDir = "d:\\TestLucene\\indexDB";

	@SuppressWarnings({ "unchecked", "unchecked", "deprecation", "deprecation" })
	public static PageBean getPageQuery(int pageNo, int pageSize, String[] q)
			throws CorruptIndexException, IOException, ParseException, InvalidTokenOffsetsException {
		List result = new ArrayList();
		Searcher searcher = new IndexSearcher(FSDirectory.open(new File(
				indexDir)), true);
		Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_CURRENT);
		String[] fields = { "cbs", "zz" };
		Query query = MultiFieldQueryParser.parse(Version.LUCENE_CURRENT, q,
				fields, analyzer);

		TopScoreDocCollector topCollector = TopScoreDocCollector.create(
				searcher.maxDoc(), false);
		searcher.search(query, topCollector);
		// 高亮设置
		SimpleHTMLFormatter simpleHtmlFormatter = new SimpleHTMLFormatter(
				"<B>", "</B>");//
		Highlighter highlighter = new Highlighter(simpleHtmlFormatter,
				new QueryScorer(query));

		// 查询当页的记录
		ScoreDoc[] docs = topCollector.topDocs((pageNo - 1) * pageSize,
				pageSize).scoreDocs;
		for (ScoreDoc scdoc : docs) {
			Document document = searcher.doc(scdoc.doc);
			TokenStream tokenStream = analyzer.tokenStream("text",
					new StringReader(document.get("cbs")));
			String str = highlighter.getBestFragment(tokenStream, document.get("cbs"));  
			result.add("id=" + document.get("id") + "|cbs="
					+ document.get("cbs") + "|zz=" + document.get("zz")+"|red"+str);

		}
		PageBean pb = new PageBean();
		pb.setCurrentPage(pageNo);// 当前页
		pb.setPageSize(pageSize);
		pb.setAllRow(topCollector.getTotalHits());// hit中的记录数目
		pb.setList(result);
		return pb;

	}

	public static void main(String[] args) throws CorruptIndexException,
			IOException, ParseException, InvalidTokenOffsetsException {
		String[] q = { "中国", "外国" };
		long start = new Date().getTime();
		PageBean pb = getPageQuery(1, 4, q);
		System.out.println("页面内容-------开始---");
		List pgResult = pb.getList();
		for (int i = 0; i < pgResult.size(); i++) {
			System.out.println(pgResult.get(i).toString());
		}
		System.out.println("页面内容-------结束---");
		System.out.println("当前页号 " + pb.getCurrentPage());
		System.out.println("是否是第一个页? " + pb.isFirstPage());
		System.out.println("是否是最后页? " + pb.isLastPage());
		System.out.println("存在上一页? " + pb.isHasPreviousPage());
		System.out.println("存在下一页? " + pb.isHasNextPage());
		System.out.println("每页的记录数 " + pb.getPageSize());
		System.out.println("总页数 " + pb.getTotalPage());
		System.out.println("总记录数 " + pb.getAllRow());
		long end = new Date().getTime();
		System.out.println("花费时间：" + (double) (end - start) / 1000 + "秒");

	}

}

 

 

分页类有个小bug

 分页的前台scrip

 

function changepage(pid){
	    var url="";
	    if(pid=='1'){
	    	window.location=url+"&page=1";
	    }
	    if(pid=='2'){
	    	window.location=url+"&page=${dataList.currentPage-1}";
	    }
	    if(pid=='3'){
	    	window.location=url+"&page=${dataList.currentPage+1}";
	    }
	    if(pid=='4'){
	   		window.location=url+"&page=${dataList.totalPage}";
	    }
	}

 前台分页java

 

 

 

<table>
<tr>
<td>
<table>
<c:forEach items="${dataList.list}" var="m"> ${m}</c:forEach>
</table>
</td>
</tr>
<tr>
<td>
<table width="100%" border="0" cellspacing="2" cellpadding="0">
						<tr>
							<td height="25" align="center">
								<div id="page" class="txt_p">
									共${dataList.totalPage}页
									<c:choose>
										<c:when test="${dataList.hasPreviousPage}">
											<a href="javascript:changepage('1')">首页</a>
											<a href="javascript:changepage('2')"> <img
													src="${skinPath}images/hygl/left_h.gif" align="absmiddle"
													border="0" /> </a>
											<a href="javascript:changepage('2')">上一页</a>
										</c:when>
										<c:otherwise>
											首页
										<img src="${skinPath}images/hygl/left_b.gif" align="absmiddle" />上一页
										</c:otherwise>
									</c:choose>
									第${dataList.currentPage}页
									<c:choose>
										<c:when test="${dataList.hasNextPage}">
											<a href="javascript:changepage('3')">下一页</a>
											<a href="javascript:changepage('3')"> <img
													src="${skinPath}images/hygl/right_h.gif" align="absmiddle"
													border="0" /> </a>
											<a href="javascript:changepage('4')">尾页</a>
										</c:when>
										<c:otherwise>
                                              下一页<img
												src="${skinPath}images/hygl/right_b.gif" align="absmiddle" />尾页
                                         </c:otherwise>
									</c:choose>
								</div>
							</td>
						</tr>
					</table>
</td>
</tr>

</table>