前两天看到了一个中国新闻网,这个网站的搜索form的action是
http://search.chinanews.com/search.do
便知道是struts1的产物,现在都用struts2了,所以给自己的任务是实现Struts2 SSH分页浏览新闻、Lucene分页高亮排序搜索新闻这个两个功能。
IDE使用的MyEclipse6.5,数据库使用MySQL 5.0.37 , 另装了Navicat for MySQL , jdk版本是6.0
工程做完的效果图如下,com.zly.indexManager中两个类,分别创建索引和搜索索引,
com.zly.test.entity中是使用的实体类,分别是NewsType(新闻类型),NewsItem(新闻具体条目),PageControl(分页实体bean) , SearchResultBean(保存搜索结果的bean).
浏览和搜索的前提是有据可查,没有数据什么都实现不了 , 我使用了Htmlparser通过抓取页面信息的形式将新闻添加进数据库 , 添加数据库数据使用了hibernate3
使用了Annotation的方式完成数据库的映射。
//NewsType(新闻类型)
Java代码package com.zly.test.entity;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "t_newsType")
public class NewsType implements Serializable {
private static final long serialVersionUID = -5092622762025999122L;
private Integer id;
private String newsTypeName;
@Column
public String getNewsTypeName() {
return newsTypeName;
}
public void setNewsTypeName(String newsTypeName) {
this.newsTypeName = newsTypeName;
}
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
}
//NewsItem(新闻具体条目)
Java代码
package com.zly.test.entity;
import java.io.Serializable;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
@Entity
@Table(name = "t_newsItem")
public class NewsItem implements Serializable {
private static final long serialVersionUID = -7532888546907495633L;
private Integer id ;
private String newsTitle ;
private String newsContent;
private Date publishTime;
private String resource;
private NewsType type;
private String editor;
@Column
public String getEditor() {
return editor;
}
public void setEditor(String editor) {
this.editor = editor;
}
@ManyToOne
@JoinColumn(name = "t_newsType_id")
public NewsType getType() {
return type;
}
public void setType(NewsType type) {
this.type = type;
}
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
@Column
public String getNewsTitle() {
return newsTitle;
}
public void setNewsTitle(String newsTitle) {
this.newsTitle = newsTitle;
}
@Temporal(value = TemporalType.TIMESTAMP)
public Date getPublishTime() {
return publishTime;
}
public void setPublishTime(Date publishTime) {
this.publishTime = publishTime;
}
public String getResource() {
return resource;
}
public void setResource(String resource) {
this.resource = resource;
}
public String getNewsContent() {
return newsContent;
}
public void setNewsContent(String newsContent) {
this.newsContent = newsContent;
}
}
添加所有新闻类型的类放在了com.zly.test.newsFetch包下 , 具体代码:
Java代码
package com.zly.test.newsfetch;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
import org.htmlparser.Parser;
import org.htmlparser.Tag;
import org.htmlparser.filters.NodeClassFilter;
import org.htmlparser.tags.Div;
import org.htmlparser.tags.LinkTag;
import org.htmlparser.util.NodeList;
import org.htmlparser.visitors.NodeVisitor;
import com.zly.test.entity.NewsItem;
import com.zly.test.entity.NewsType;
public class GetNews {
public static void main(String[] args) throws Exception {
//插入数据新闻类型
//insertAllTypes();
//插入所有新闻数据
//国内新闻
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/gn/2009/05" ,"/news.shtml" ,1);
//国际新闻
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/gj/2009/05" ,"/news.shtml" ,2);
//社会新闻
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/sh/2009/05" ,"/news.shtml" ,3);
//港澳新闻
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/ga/2009/05" ,"/news.shtml" ,4);
//*新闻
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/tw/2009/05" ,"/news.shtml" ,5);
//华人新闻
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/hr/2009/05" ,"/news.shtml" ,6);
//经济新闻
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/cj/2009/05" ,"/news.shtml" ,7);
//文化新闻
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/wh/2009/05" ,"/news.shtml" ,8);
//娱乐新闻
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/yl/2009/05" ,"/news.shtml" ,9);
//体育新闻
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/ty/2009/05" ,"/news.shtml" ,10);
//教育新闻
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/edu/2009/05" ,"/news.shtml" ,11);
//健康新闻
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/jk/2009/05" ,"/news.shtml" ,12);
//生活新闻
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/life/2009/05" ,"/news.shtml" ,13);
//IT新闻
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/it/2009/05" ,"/news.shtml" ,14);
}
public static void insertAllTypes() {
Configuration cfg = new AnnotationConfiguration().configure();
SessionFactory factory = cfg.buildSessionFactory();
Session session = factory.openSession();
String str = new String("国内 国际 社会 港澳 * 华人 经济 文化 娱乐 体育 教育 健康 生活 IT");
String[] typesStr = str.split(" ");
NewsType[] types = new NewsType[typesStr.length];
session.beginTransaction();
for (int i = 0; i < typesStr.length; i++) {
types[i] = new NewsType();
types[i].setNewsTypeName(typesStr[i]);
session.save(types[i]);
}
session.getTransaction().commit();
session.close();
}
//处理5.1 - 5.5 所有的具体类型的新闻
public static void insertNewsItems(String before , String after , int type) throws Exception {
Configuration cfg = new AnnotationConfiguration().configure();
SessionFactory factory = cfg.buildSessionFactory();
Session session = factory.openSession();
//得到当前新闻所属类别
NewsType newsType = (NewsType) session.get(NewsType.class, type);
final Set<NewsItem> set = new LinkedHashSet<NewsItem>();
//获取5月1日-5月5日的新闻
for (int i = 1; i <= 5; i++) {
String src = before;
if(i < 10) {
src = src + "0" + i;
}else {
src = src + i ;
}
src = src + after;
//使用htmlParser获取每一条新闻的超链接
Parser parser = new Parser(src);
parser.setEncoding("gb2312");
NodeList divList = parser.parse(new NodeClassFilter(Div.class));
for (int j = 0; j < divList.size(); j++) {
Div div = (Div) divList.elementAt(j);
String divClass = div.getAttribute("id");
//取得id为news_list的div
if(divClass != null && divClass.equals("news_list")) {
div.accept(new NodeVisitor() {
//遍历news_list里面的所有超链接
public void visitTag(Tag tag) {
if(tag instanceof LinkTag) {
String href = ((LinkTag)tag).getLink();
if(!href.startsWith("http")) {
href = "http://www.chinanews.com.cn" + href;
}
System.out.println(href);
//找到超链接,将这个超链接所在的页面进行处理,抓取新闻数据,并将其保存在Set中。
try{
insertOneNews(href , set);
}catch(Exception e) {
e.printStackTrace();
}
}
}
});
}
}
}
//获取新闻完成后,将所有NewsItem添加到数据库
session.beginTransaction();
for (NewsItem newsItem : set) {
newsItem.setType(newsType);
session.save(newsItem);
}
session.getTransaction().commit();
session.close();
}
//处理每一个具体的新闻超链接,得到NewsItem类
public static void insertOneNews(String src , Set<NewsItem> set) throws Exception {
Parser parser = new Parser(src);
parser.setEncoding("gb2312");
NodeList divList = parser.extractAllNodesThatMatch(new NodeClassFilter(Div.class));
NewsItem newsItem = new NewsItem();
String title = "";
Date parse = null;
String content = "";
String editor = "";
//遍历网页的div。将制定div里面的信息设置到NewsItem实体类中
for (int i = 0; i < divList.size(); i++) {
Div div = (Div) divList.elementAt(i);
String divString = div.getAttribute("class");
if(divString != null) {
//设置标题
if(divString.equals("left_bt")) {
title = div.toPlainTextString();
}
//设置发布时间
if(divString.equals("left_time")) {
String publishStr = "";
Pattern pattern = Pattern.compile("[//d]{4}年[//d]{2}月[//d]{2}日 [//d]{2}:[//d]{2}");
Matcher matcher = pattern.matcher(div.toPlainTextString()) ;
if(matcher.find()) {
publishStr = matcher.group();
}
DateFormat format = new SimpleDateFormat("yyyy年MM月dd日 HH:mm");
parse = format.parse(publishStr);
}
//设置正文内容
if(divString.equals("left_zw")) {
content = div.toHtml();
}
//设置记者名称
if(divString.equals("left_name")) {
editor = div.toPlainTextString().trim();
editor = editor.substring(editor.indexOf(":") + 1, editor.lastIndexOf("】"));
}
}
}
newsItem.setEditor(editor);
newsItem.setNewsContent(content);
newsItem.setNewsTitle(title);
newsItem.setPublishTime(parse);
//设置新闻来源
newsItem.setResource("最快新闻网");
//将新闻添加到set中
set.add(newsItem);
}
}
通过上面的代码完成了所有的数据添加工作。
下面根据ssh的流程分别定制dao , manager , action
com.zly.test.dao包中是所有操作dao的抽象类和接口
我们直接看这些接口的实现
//NewsItemDaoHibernate 新闻实体类dao
Java代码
@SuppressWarnings("unchecked")
//根据分页得到具体页的内容
public List<com.zly.test.entity.NewsItem> getNewsItemByFirstResultAndMaxResult(
final int firstResult, final int maxResult , final int type) {
return (List<NewsItem>) this.getHibernateTemplate().execute(new HibernateCallback() {
public Object doInHibernate(Session session)
throws HibernateException, SQLException {
return session.createQuery(" from NewsItem where type.id = '" + type + "'").setFirstResult(firstResult).setMaxResults(maxResult).list();
}
});
}
//得到数据总条数 , 以便计算总页数
public Long getItemCount(final int id) {
return (Long) this.getHibernateTemplate().execute(new HibernateCallback(){
public Object doInHibernate(Session session)
throws HibernateException, SQLException {
return session.createQuery("select count(*) from NewsItem where type.id = '" + id + "'").uniqueResult();
}
});
}
//显示新闻数据页面用到, 查询具体新闻属于哪个新闻类别
public int getNewsType(final int id) {
return (Integer) this.getHibernateTemplate().execute(new HibernateCallback() {
public Object doInHibernate(Session session)
throws HibernateException, SQLException {
NewsItem newsItem = get(id);
NewsType type = newsItem.getType();
return type.getId();
}
});
}
在applicationContext-action.xml中配置action类别
Java代码<bean class="com.zly.test.action.NewsAction" id="newsAction" scope="request">
<property name="newsManager" ref="newsManager"></property>
<property name="map" ref="map"></property>
<property name="map1" ref="map1"></property>
</bean>
key是?category后面的值 , value是两部分 , 被###分割开 , 前面的数值是所属新闻类别的id值, 后面的文字是其类别的文字。将其保存在map中,避免不停地查询数据库。
分页类PageControl的代码如下:
Java代码
package com.zly.test.entity;
import java.util.List;
public class PageControl {
private int curPage ; //当前是第几页
private int maxPage ; //一共有多少页
private Long maxRowCount ; //一共有多少行
private int rowsPerPage = 8 ; //每页有多少行
private List<?> data;//每页的User
public int getCurPage() {
return curPage;
}
public void setCurPage(int curPage) {
this.curPage = curPage;
}
public int getMaxPage() {
return maxPage;
}
public void setMaxPage(int maxPage) {
this.maxPage = maxPage;
}
public List<?> getUserList() {
return data;
}
public void setUserList(List<?> data) {
this.data = data;
}
public Long getMaxRowCount() {
return maxRowCount;
}
public void setMaxRowCount(Long amaxRowCountxRowCount) {
this.maxRowCount = amaxRowCountxRowCount;
}
public int getRowsPerPage() {
return rowsPerPage;
}
public void setRowsPerPage(int rowsPerPage) {
this.rowsPerPage = rowsPerPage;
}
public void countMaxPage() { //根据总行数计算总页数
if (this.maxRowCount % this.rowsPerPage ==0){
this.maxPage = (int) (this.maxRowCount/this.rowsPerPage);
}else{
this.maxPage = (int) (this.maxRowCount/this.rowsPerPage + 1);
}
}
}
被许多页所包含的page.jsp代码如下:
Java代码
<%@ page language="java" contentType="text/html;charset=utf-8"
pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<script language="javascript">
function jumping() {
document.pageForm.submit();
return true;
}
function gotoPage(pageNum) {
document.pageForm.jumpPage.value = pageNum ;
document.pageForm.submit();
return true;
}
</script>
</head>
<body>
<c:if test="${pageControl.maxPage != 1}">
<form method="post" action="pageAction.action" name="pageForm">
<table>
<tr>
<td>
每页${pageControl.rowsPerPage}行
</td>
<td>
共${pageControl.maxRowCount }行
</td>
<td>
第${pageControl.curPage }页
</td>
<td>
共${pageControl.maxPage }页
</td>
<td>
<c:choose>
<c:when test="${pageControl.curPage == 1}">
首页 上一页
</c:when>
<c:otherwise>
<A HREF="javascript:gotoPage(1)">首页</A>
<A HREF="javascript:gotoPage(${pageControl.curPage - 1} )">上一页</A>
</c:otherwise>
</c:choose>
<c:choose>
<c:when test="${pageControl.curPage == pageControl.maxPage}">
下一页 尾页
</c:when>
<c:otherwise>
<A HREF="javascript:gotoPage(${pageControl.curPage + 1})">下一页</A>
<A HREF="javascript:gotoPage(${pageControl.maxPage })">尾页</A>
</c:otherwise>
</c:choose>
转到第
<SELECT name="jumpPage" onchange="jumping()">
<c:forEach var="i" begin="1" end="${pageControl.maxPage}" step="1">
<c:choose>
<c:when test="${i == pageControl.curPage}">
<OPTION selected value="${i}">${i }</OPTION>
</c:when>
<c:otherwise>
<OPTION value="${i}">${i}</OPTION>
</c:otherwise>
</c:choose>
</c:forEach>
</SELECT>
页
</td>
</tr>
</table>
</form>
</c:if>
</body>
</html>
下面是struts.xml中关于页面展示新闻的配置
Java代码
<action name="newsAction" class="newsAction" >
<result type="redirect">pageAction.action</result>
</action>
<action name="pageAction" class="newsAction" method="pageAction">
<result>/result.jsp</result>
</action>
<action name="detailAction" class="newsAction" method="showDetail">
<result>/detail.jsp</result>
</action>
首页页面index.jsp,里面有几个分类超链接和搜索对话框
Java代码
<%@ page language="java" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>最快新闻网</title>
<link href="css/main.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="mainlink">
<span><a href="index.jsp">最快新闻网</a></span><br /><br />
<a href="newsAction.action?category=china" target="_blank">国内</a> | <a href="newsAction.action?category=world" target="_blank">国际</a> | <a href="newsAction.action?category=society" target="_blank">社会</a> | <a href="newsAction.action?category=compatriot" target="_blank">港澳</a> | <a href="newsAction.action?category=*" target="_blank">*</a> | <a href="newsAction.action?category=huaren" target="_blank">华人</a> | <a href="newsAction.action?category=economic" target="_blank">经济</a> | <a href="newsAction.action?category=wenhua" target="_blank">文化</a> | <a href="newsAction.action?category=entertainment" target="_blank">娱乐</a> | <a href="newsAction.action?category=sports" target="_blank">体育</a> | <a href="newsAction.action?category=jiaoyu" target="_blank">教育</a> | <a href="newsAction.action?category=jiankang" target="_blank">健康</a> | <a href="newsAction.action?category=life" target="_blank">生活</a> | <a href="newsAction.action?category=keji" target="_blank">IT</a><br />
<form action="searchAction.action" method="post" target="_blank">
本站搜索:
<input type="text" name="searchParam" style="height:20px"/>
<select name="searchWhich">
<option value="title"/>标题
<option value="content"/>内容
</select>
<input type="submit" value="搜索" style="height:23px"/>
</form>
</div>
</body>
</html>
其表现形式如下:
新闻分页展示页面result.jsp代码如下:
Html代码<%@ page language="java" contentType="text/html;charset=utf-8"
pageEncoding="utf-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>${typeString} -- 最快新闻网</title>
</head>
<body>
<jsp:include page="index.jsp"></jsp:include>
<div id="content">
<font color="red" size="5">${typeString}</font>
<br /><br /><br /><br />
<div id="newsListTitle" style="float:left;">
<c:forEach items="${pageControl.data}" var="news">
<div style="margin-top: 20px;">
<span>
<a href="detailAction.action?id=${news.id }">${news.newsTitle }</a>
</span>
<br />
</div>
</c:forEach>
</div>
<div id="newsListTime">
<c:forEach items="${pageControl.data}" var="news">
<div style="margin-top: 20px;">
<span>
<fmt:formatDate value="${news.publishTime}" pattern="MM-dd HH:mm"/>
</span>
<br />
</div>
</c:forEach>
</div>
<br /><br /><br /><br />
<%@ include file="page.jsp" %>
</div>
</body>
</html>
显示效果如下:
其中点击具体超链接的效果图如下:
任务1 到此完成,新闻显示工作结束。下面是搜索引擎部分。
搜索的工具类放置在com.zly.indexManager包下面
说明,本程序使用了庖丁解牛中文分词,用户使用时需要中文字典,我的字典放在了c:/dic下面,使用庖丁还需要配置环境变量PAODING_DIC_HOME , 其值为c:/dic , (就是你的字典文件所在的目录)
代码如下:
创建索引类IndexCreateUtil
Java代码
package com.zly.indexManager;
import java.io.File;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.List;
import net.paoding.analysis.analyzer.PaodingAnalyzer;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
import org.hibernate.Session;
import org.htmlparser.Parser;
import com.zly.test.entity.NewsItem;
public class IndexCreateUtil {
@SuppressWarnings("unchecked")
public void createIndexForNews() throws Exception {
//存放索引的文件夹
File indexFile = new File("c:/index/news");
//使用了庖丁解牛分词器
Analyzer analyzer = new PaodingAnalyzer();
//使用索引文件夹,庖丁解牛分词器创建IndexWriter
IndexWriter indexWriter = new IndexWriter(indexFile , analyzer , true);
//从数据库中读取出所有的新闻记录以便进行索引的创建
Configuration cfg = new AnnotationConfiguration().configure();
SessionFactory factory = cfg.buildSessionFactory();
Session session = factory.openSession();
List<NewsItem> list = session.createQuery(" from NewsItem").list();
DateFormat format = new SimpleDateFormat("yyyy年MM月dd日 HH时mm分ss秒");
//对所有的新闻实体进行索引创建
for (NewsItem newsItem : list) {
//建立一个lucene文档
Document doc = new Document();
//得到新闻标题
String newsTitle = newsItem.getNewsTitle();
//得到新闻内容
String newsContent = newsItem.getNewsContent();
//得到新闻事件
String publishDate = format.format(newsItem.getPublishTime());
//得到新闻主键id
String id = newsItem.getId() + "";
//将新闻标题加入文档,因为要搜索和高亮,所以index是tokennized,TermVector是WITH_POSITIONS_OFFSETS
doc.add(new Field("title" , newsTitle , Field.Store.YES , Field.Index.TOKENIZED , Field.TermVector.WITH_POSITIONS_OFFSETS));
//利用htmlparser得到新闻内容html的纯文本
Parser parser = new Parser();
parser.setInputHTML(newsContent);
String strings = parser.parse(null).elementAt(0).toPlainTextString().trim();
//添加新闻内容至文档,与标题相似
doc.add(new Field("content" , strings , Field.Store.COMPRESS , Field.Index.TOKENIZED , Field.TermVector.WITH_POSITIONS_OFFSETS));
//添加时间至文档,因为要按照此字段降序排列排序,所以tokenzied,不用高亮所以TermVector是no就行了
doc.add(new Field("date" , publishDate , Field.Store.YES , Field.Index.TOKENIZED , Field.TermVector.NO));
//添加主键至文档,不分词,不高亮。
doc.add(new Field("id" , id , Field.Store.YES , Field.Index.NO , Field.TermVector.NO));
indexWriter.addDocument(doc);
}
//创建索引
indexWriter.optimize();
indexWriter.close();
//关闭session
session.close();
}
public static void main(String[] args) throws Exception {
IndexCreateUtil util = new IndexCreateUtil();
util.createIndexForNews();
}
}
对索引进行搜索的代码如下:
Java代码
package com.zly.indexManager;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import net.paoding.analysis.analyzer.PaodingAnalyzer;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexReader;
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 org.apache.lucene.search.Sort;
import org.apache.lucene.search.highlight.Highlighter;
import org.apache.lucene.search.highlight.QueryScorer;
import org.apache.lucene.search.highlight.SimpleFragmenter;
import org.apache.lucene.search.highlight.SimpleHTMLFormatter;
import com.zly.test.entity.SearchResultBean;
public class IndexSearchUtil {
public List<SearchResultBean> getSearchResult(String searchWhich , String searchParam , int firstResult , int maxResult) throws Exception{
//索引所在文件夹
File indexFile = new File("c:/index/news");
//读取索引的indexReader
IndexReader reader = IndexReader.open(indexFile);
//庖丁解牛分词器
Analyzer analyzer = new PaodingAnalyzer();
//指定对content还是title进行查询
QueryParser parser = new QueryParser(searchWhich , analyzer);
//创建indexSearcher
IndexSearcher searcher = new IndexSearcher(reader);
//对用户的输入进行查询
Query query = parser.parse(searchParam);
//根据date字段进行排序,得到查询结果
Hits hits = searcher.search(query , new Sort("date" , true));
//创建list,将结果保存其中,以便在jsp页面中进行显示
List<SearchResultBean> list = new ArrayList<SearchResultBean>();
//模拟hibernate的serFirstResult和setMaxResult以便返回指定条目的结果
for (int i = firstResult - 1; i < firstResult + maxResult - 1; i++) {
Document doc = hits.doc(i);
//取得该条索引文档
SearchResultBean srb = new SearchResultBean();
//从中取出标题
String title = doc.get("title");
//从中取出内容
String content = doc.get("content");
//从中取出主键id
String id = doc.get("id");
//从中取出发布时间
String date = doc.get("date");
//高亮htmlFormatter对象
SimpleHTMLFormatter sHtmlF = new SimpleHTMLFormatter("<b><font color='red'>", "</font></b>");
//高亮对象
Highlighter highlighter = new Highlighter(sHtmlF,new QueryScorer(query));
//设置高亮附近的字数
highlighter.setTextFragmenter(new SimpleFragmenter(100));
//如果查询的是标题,进行处理
if(searchWhich.equals("title")) {
String bestFragment = highlighter.getBestFragment(analyzer,searchWhich,title);
//获得高亮后的标题内容
srb.setTitle(bestFragment);
//如果内容不足150个字,全部设置
if(content.length() < 150) {
srb.setContent(content);
}else {
//如果内容多于150个字,只取出前面150个字
srb.setContent(content.substring(0 , 150));
}
} else {
//如果查询的是内容字段
String bestFragment = highlighter.getBestFragment(analyzer,searchWhich,content);
//取得高亮内容并设置
srb.setContent(bestFragment);
//设置标题,全部设置
srb.setTitle(title);
}
//设置日期
srb.setDate(date);
//设置主键
srb.setId(id);
//添加到list中,以便在jsp页面上显示
list.add(srb);
}
return list;
}
//取得符合搜索条件的所有记录总数,以便分页 , 与上面方法类似
public int getResultCount(String searchWhich , String searchParam) throws Exception {
File indexFile = new File("c:/index/news");
IndexReader reader = IndexReader.open(indexFile);
Analyzer analyzer = new PaodingAnalyzer();
QueryParser parser = new QueryParser(searchWhich , analyzer);
IndexSearcher searcher = new IndexSearcher(reader);
Query query = parser.parse(searchParam);
Hits hits = searcher.search(query);
return hits.length();
}
}
分页action代码如下:
Java代码package com.zly.test.action;
import java.util.List;
import com.zly.indexManager.IndexSearchUtil;
import com.zly.test.entity.PageControl;
import com.zly.test.entity.SearchResultBean;
public class SearchAction extends BaseAction {
private static final long serialVersionUID = -2387037924517370511L;
//查询索引实体类
private IndexSearchUtil indexSearcher;
//对应搜索字段是标题还是内容
private String searchWhich;
//对应用户输入的搜索内容
private String searchParam;
//对应分页跳转到的页面
private String jumpPage;
public String getJumpPage() {
return jumpPage;
}
public void setJumpPage(String jumpPage) {
this.jumpPage = jumpPage;
}
public String getSearchWhich() {
return searchWhich;
}
public void setSearchWhich(String searchWhich) {
this.searchWhich = searchWhich;
}
public String getSearchParam() {
return searchParam;
}
public void setSearchParam(String searchParam) {
this.searchParam = searchParam;
}
public String search() throws Exception {
//如果为空,说明第一次进入分页
if(jumpPage == null) {
jumpPage = "1";
}
//从request范围内取得pageControl对象
PageControl pageControl = (PageControl) this.getRequest().getAttribute("pageControl");
//如果为空,则是第一次分页,创建分页对象,并且设置总的记录条数,以便设置最大页数
if(pageControl == null) {
pageControl = new PageControl();
pageControl.setMaxRowCount((long)indexSearcher.getResultCount(searchWhich, searchParam));
pageControl.countMaxPage();
}
//设置当前页
pageControl.setCurPage(Integer.parseInt(jumpPage));
//计算firstResult
int firstResult = (pageControl.getCurPage() - 1) * pageControl.getRowsPerPage() + 1;
//计算从当前条数算还有多少条记录
long left = pageControl.getMaxRowCount() - firstResult;
int maxResult = -1;
//如果剩余的记录数不如每页显示数,就设置maxResult为剩余条数
if(left < pageControl.getRowsPerPage()) {
maxResult = Integer.valueOf(left + "");
//如果剩余记录数大于每页显示页数,就设置maxResult为每页条数
}else {
maxResult = pageControl.getRowsPerPage();
}
//取得查询结果集
List<SearchResultBean> userList = indexSearcher.getSearchResult(searchWhich, searchParam, firstResult, maxResult);
//设置为pageControl
pageControl.setData(userList);
//将pageControl设置到request范围,以便在jsp现实结果
this.getRequest().setAttribute("pageControl", pageControl);
//将searchWhich和searchParam设置到request范围,以便添加到分页jsp的form里面的hidden表单域,以便下次分页时,能够将值提交过来
this.getRequest().setAttribute("searchWhich", searchWhich);
this.getRequest().setAttribute("searchParam", searchParam);
//跳转到分页视图
return SUCCESS;
}
public IndexSearchUtil getIndexSearcher() {
return indexSearcher;
}
public void setIndexSearcher(IndexSearchUtil indexSearcher) {
this.indexSearcher = indexSearcher;
}
}
搜索的action在struts.xml中设置如下:
Xml代码
<action name="searchAction" class="searchAction" method="search">
<result>/searchResult.jsp</result>
</action>
<action name="searchAction" class="searchAction" method="search">
<result>/searchResult.jsp</result>
</action>
//searchResult.jsp代码如下:
Html代码
<%@ page language="java" contentType="text/html;charset=utf-8"
pageEncoding="utf-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>${searchParam} 的搜查结果 -- 最快新闻网</title>
</head>
<body>
<jsp:include page="index.jsp"></jsp:include>
<div id="content">
<div id="searchResults" >
<c:forEach items="${pageControl.data}" var="result">
<div style="margin-top: 20px;">
<span>
<a href="detailAction.action?id=${result.id }">${result.title}</a><br />
${result.content }
<font color="green">http://localhost:8080/NewsWithSearch/detailAction.action?id=${result.id } ${result.date }</font>
</span>
<br />
</div>
</c:forEach>
</div>
<br /><br /><br /><br />
<%@ include file="searchPage.jsp" %>
</div>
</body>
</html>
其运行结果如图所示(按标题搜索):
按内容搜索的运行结果如下:
至此,本小项目的所有功能完成,虽然没有多少难度,也不是什么高科技, 俺还是在google和javaeye上查了不少资料,总算是做完了,贴出来,与大家分享,也给新手学习提供资料。
所有的资源我都添加到了附件中,学过ssh的同学应该能够成功部署项目并运行。
其中NewsWithSearch.rar是工程文件夹,包含了所有的代码文件和jar包,加压完直接引到MyEclipse里就行,data.rar是所有的sql语句,插入到MySQL之前应先建立数据库mynews , dic.rar是庖丁解牛用到的字典文件,
解压成一个文件夹,并配置环境变量PAODING_DIC_HOME,其值就是你把它解压成的文件夹(例如c:/dic),最后如果你不想创建索引的话,可以把news.rar解压成一个文件夹,拷贝到c:/index/news下面。
以上是那位牛兄的代码,实在太多了,机械的粘贴复制也是挺累的。不过坚持就是胜利吗,终于复制完了。但可能会有篡行或复制错的地方,请多谅解。
源代码下载:
SSH + Lucene + 分页 + 排序 + 高亮 模拟简单新闻网站搜索引擎--NewsWithSearch.part3
SSH + Lucene + 分页 + 排序 + 高亮 模拟简单新闻网站搜索引擎--NewsWithSearch.part2
SSH + Lucene + 分页 + 排序 + 高亮 模拟简单新闻网站搜索引擎--NewsWithSearch.part1
SSH + Lucene + 分页 + 排序 + 高亮 模拟简单新闻网站搜索引擎--news.part2
SSH + Lucene + 分页 + 排序 + 高亮 模拟简单新闻网站搜索引擎--news.part1
SSH + Lucene + 分页 + 排序 + 高亮 模拟简单新闻网站搜索引擎--dic
原出处请看:http://www.javaeye.com/post/1068335