前兩天看到了一箇中國新聞網,這個網站的搜索form的action是
http://search.chinanews.com/search.do
便知道是struts1的產物,現在都用struts2了,所以給自己的任務是實現Struts2 SSH分頁瀏覽新聞、Lucene分頁高亮排序搜索新聞這個兩個功能。
IDE使用的MyEclipse6.5,數據庫使用MySQL 5.0.37 , 另裝了Navicat for MySQL , jdk版本是6.0
工程做完的效果圖如下,com.zly.indexManager中兩個類,分別創建索引和搜索索引,
com.zly.test.entity中是使用的實體類,分別是NewsType(新聞類型),NewsItem(新聞具體條目),PageControl(分頁實體bean) , SearchResultBean(保存搜索結果的bean).
瀏覽和搜索的前提是有據可查,沒有數據什麼都實現不了 , 我使用了Htmlparser通過抓取頁面信息的形式將新聞添加進數據庫 , 添加數據庫數據使用了hibernate3
使用了Annotation的方式完成數據庫的映射。
//NewsType(新聞類型)
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(新聞具體條目)
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;
}
}
添加所有新聞類型的類放在了com.zly.test.newsFetch包下 , 具體代碼:
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 {
//插入數據新聞類型
//insertAllTypes();
//插入所有新聞數據
//國內新聞
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/gn/2009/05" ,"/news.shtml" ,1);
//國際新聞
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/gj/2009/05" ,"/news.shtml" ,2);
//社會新聞
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/sh/2009/05" ,"/news.shtml" ,3);
//港澳新聞
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/ga/2009/05" ,"/news.shtml" ,4);
//臺灣新聞
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/tw/2009/05" ,"/news.shtml" ,5);
//華人新聞
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/hr/2009/05" ,"/news.shtml" ,6);
//經濟新聞
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/cj/2009/05" ,"/news.shtml" ,7);
//文化新聞
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/wh/2009/05" ,"/news.shtml" ,8);
//娛樂新聞
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/yl/2009/05" ,"/news.shtml" ,9);
//體育新聞
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/ty/2009/05" ,"/news.shtml" ,10);
//教育新聞
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/edu/2009/05" ,"/news.shtml" ,11);
//健康新聞
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/jk/2009/05" ,"/news.shtml" ,12);
//生活新聞
//insertNewsItems("http://www.chinanews.com.cn/scroll-news/life/2009/05" ,"/news.shtml" ,13);
//IT新聞
//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("國內 國際 社會 港澳 臺灣 華人 經濟 文化 娛樂 體育 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();
}
//處理5.1 - 5.5 所有的具體類型的新聞
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();
//得到當前新聞所屬類別
NewsType newsType = (NewsType) session.get(NewsType.class, type);
final Set<NewsItem> set = new LinkedHashSet<NewsItem>();
//獲取5月1日-5月5日的新聞
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獲取每一條新聞的超鏈接
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爲news_list的div
if(divClass != null && divClass.equals("news_list")) {
div.accept(new NodeVisitor() {
//遍歷news_list裏面的所有超鏈接
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);
//找到超鏈接,將這個超鏈接所在的頁面進行處理,抓取新聞數據,並將其保存在Set中。
try{
insertOneNews(href , set);
}catch(Exception e) {
e.printStackTrace();
}
}
}
});
}
}
}
//獲取新聞完成後,將所有NewsItem添加到數據庫
session.beginTransaction();
for (NewsItem newsItem : set) {
newsItem.setType(newsType);
session.save(newsItem);
}
session.getTransaction().commit();
session.close();
}
//處理每一個具體的新聞超鏈接,得到NewsItem類
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 = "";
//遍歷網頁的div。將制定div裏面的信息設置到NewsItem實體類中
for (int i = 0; i < divList.size(); i++) {
Div div = (Div) divList.elementAt(i);
String divString = div.getAttribute("class");
if(divString != null) {
//設置標題
if(divString.equals("left_bt")) {
title = div.toPlainTextString();
}
//設置發佈時間
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);
}
//設置正文內容
if(divString.equals("left_zw")) {
content = div.toHtml();
}
//設置記者名稱
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);
//設置新聞來源
newsItem.setResource("最快新聞網");
//將新聞添加到set中
set.add(newsItem);
}
}
通過上面的代碼完成了所有的數據添加工作。
下面根據ssh的流程分別定製dao , manager , action
com.zly.test.dao包中是所有操作dao的抽象類和接口
我們直接看這些接口的實現
//NewsItemDaoHibernate 新聞實體類dao
@SuppressWarnings("unchecked")
//根據分頁得到具體頁的內容
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();
}
});
}
//得到數據總條數 , 以便計算總頁數
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();
}
});
}
//顯示新聞數據頁面用到, 查詢具體新聞屬於哪個新聞類別
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類別
<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後面的值 , value是兩部分 , 被###分割開 , 前面的數值是所屬新聞類別的id值, 後面的文字是其類別的文字。將其保存在map中,避免不停地查詢數據庫。
分頁類PageControl的代碼如下:
package com.zly.test.entity;
import java.util.List;
public class PageControl {
private int curPage ; //當前是第幾頁
private int maxPage ; //一共有多少頁
private Long maxRowCount ; //一共有多少行
private int rowsPerPage = 8 ; //每頁有多少行
private List<?> data;//每頁的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() { //根據總行數計算總頁數
if (this.maxRowCount % this.rowsPerPage ==0){
this.maxPage = (int) (this.maxRowCount/this.rowsPerPage);
}else{
this.maxPage = (int) (this.maxRowCount/this.rowsPerPage + 1);
}
}
}
被許多頁所包含的page.jsp代碼如下:
<%@ 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="${pageControl.maxPage != 1}">
<form method="post" action="pageAction.action" name="pageForm">
<table>
<tr>
<td>
每頁${pageControl.rowsPerPage}行
</td>
<td>
共${pageControl.maxRowCount }行
</td>
<td>
第${pageControl.curPage }頁
</td>
<td>
共${pageControl.maxPage }頁
</td>
<td>
<c:choose>
<c:when test="${pageControl.curPage == 1}">
首頁 上一頁
</c:when>
<c:otherwise>
<A HREF="javascript:gotoPage(1)">首頁</A>
<A HREF="javascript:gotoPage(${pageControl.curPage - 1} )">上一頁</A>
</c:otherwise>
</c:choose>
<c:choose>
<c:when test="${pageControl.curPage == pageControl.maxPage}">
下一頁 尾頁
</c:when>
<c:otherwise>
<A HREF="javascript:gotoPage(${pageControl.curPage + 1})">下一頁</A>
<A HREF="javascript:gotoPage(${pageControl.maxPage })">尾頁</A>
</c:otherwise>
</c:choose>
轉到第
<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>
頁
</td>
</tr>
</table>
</form>
</c:if>
</body>
</html>
下面是struts.xml中關於頁面展示新聞的配置
<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>
首頁頁面index.jsp,裏面有幾個分類超鏈接和搜索對話框
<%@ page language="java" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>最快新聞網</title>
<link href="css/main.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="mainlink">
<span><a href="index.jsp">最快新聞網</a></span><br /><br />
<a href="newsAction.action?category=china" target="_blank">國內</a> | <a href="newsAction.action?category=world" target="_blank">國際</a> | <a href="newsAction.action?category=society" target="_blank">社會</a> | <a href="newsAction.action?category=compatriot" target="_blank">港澳</a> | <a href="newsAction.action?category=taiwan" target="_blank">臺灣</a> | <a href="newsAction.action?category=huaren" target="_blank">華人</a> | <a href="newsAction.action?category=economic" target="_blank">經濟</a> | <a href="newsAction.action?category=wenhua" target="_blank">文化</a> | <a href="newsAction.action?category=entertainment" target="_blank">娛樂</a> | <a href="newsAction.action?category=sports" target="_blank">體育</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"/>標題
<option value="content"/>內容
</select>
<input type="submit" value="搜索" style="height:23px"/>
</form>
</div>
</body>
</html>
其表現形式如下:
新聞分頁展示頁面result.jsp代碼如下:
<%@ 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>${typeString} -- 最快新聞網</title>
</head>
<body>
<jsp:include page="index.jsp"></jsp:include>
<div id="content">
<font color="red" size="5">${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>
顯示效果如下:
其中點擊具體超鏈接的效果圖如下:
任務1 到此完成,新聞顯示工作結束。下面是搜索引擎部分。
搜索的工具類放置在com.zly.indexManager包下面
說明,本程序使用了庖丁解牛中文分詞,用戶使用時需要中文字典,我的字典放在了c:/dic下面,使用庖丁還需要配置環境變量PAODING_DIC_HOME , 其值爲c:/dic , (就是你的字典文件所在的目錄)
代碼如下:
創建索引類IndexCreateUtil
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 {
//存放索引的文件夾
File indexFile = new File("c:/index/news");
//使用了庖丁解牛分詞器
Analyzer analyzer = new PaodingAnalyzer();
//使用索引文件夾,庖丁解牛分詞器創建IndexWriter
IndexWriter indexWriter = new IndexWriter(indexFile , analyzer , true);
//從數據庫中讀取出所有的新聞記錄以便進行索引的創建
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時mm分ss秒");
//對所有的新聞實體進行索引創建
for (NewsItem newsItem : list) {
//建立一個lucene文檔
Document doc = new Document();
//得到新聞標題
String newsTitle = newsItem.getNewsTitle();
//得到新聞內容
String newsContent = newsItem.getNewsContent();
//得到新聞事件
String publishDate = format.format(newsItem.getPublishTime());
//得到新聞主鍵id
String id = newsItem.getId() + "";
//將新聞標題加入文檔,因爲要搜索和高亮,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得到新聞內容html的純文本
Parser parser = new Parser();
parser.setInputHTML(newsContent);
String strings = parser.parse(null).elementAt(0).toPlainTextString().trim();
//添加新聞內容至文檔,與標題相似
doc.add(new Field("content" , strings , Field.Store.COMPRESS , Field.Index.TOKENIZED , Field.TermVector.WITH_POSITIONS_OFFSETS));
//添加時間至文檔,因爲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));
//添加主鍵至文檔,不分詞,不高亮。
doc.add(new Field("id" , id , Field.Store.YES , Field.Index.NO , Field.TermVector.NO));
indexWriter.addDocument(doc);
}
//創建索引
indexWriter.optimize();
indexWriter.close();
//關閉session
session.close();
}
public static void main(String[] args) throws Exception {
IndexCreateUtil util = new IndexCreateUtil();
util.createIndexForNews();
}
}
對索引進行搜索的代碼如下:
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{
//索引所在文件夾
File indexFile = new File("c:/index/news");
//讀取索引的indexReader
IndexReader reader = IndexReader.open(indexFile);
//庖丁解牛分詞器
Analyzer analyzer = new PaodingAnalyzer();
//指定對content還是title進行查詢
QueryParser parser = new QueryParser(searchWhich , analyzer);
//創建indexSearcher
IndexSearcher searcher = new IndexSearcher(reader);
//對用戶的輸入進行查詢
Query query = parser.parse(searchParam);
//根據date字段進行排序,得到查詢結果
Hits hits = searcher.search(query , new Sort("date" , true));
//創建list,將結果保存其中,以便在jsp頁面中進行顯示
List<SearchResultBean> list = new ArrayList<SearchResultBean>();
//模擬hibernate的serFirstResult和setMaxResult以便返回指定條目的結果
for (int i = firstResult - 1; i < firstResult + maxResult - 1; i++) {
Document doc = hits.doc(i);
//取得該條索引文檔
SearchResultBean srb = new SearchResultBean();
//從中取出標題
String title = doc.get("title");
//從中取出內容
String content = doc.get("content");
//從中取出主鍵id
String id = doc.get("id");
//從中取出發佈時間
String date = doc.get("date");
//高亮htmlFormatter對象
SimpleHTMLFormatter sHtmlF = new SimpleHTMLFormatter("<b><font color='red'>", "</font></b>");
//高亮對象
Highlighter highlighter = new Highlighter(sHtmlF,new QueryScorer(query));
//設置高亮附近的字數
highlighter.setTextFragmenter(new SimpleFragmenter(100));
//如果查詢的是標題,進行處理
if(searchWhich.equals("title")) {
String bestFragment = highlighter.getBestFragment(analyzer,searchWhich,title);
//獲得高亮後的標題內容
srb.setTitle(bestFragment);
//如果內容不足150個字,全部設置
if(content.length() < 150) {
srb.setContent(content);
}else {
//如果內容多於150個字,只取出前面150個字
srb.setContent(content.substring(0 , 150));
}
} else {
//如果查詢的是內容字段
String bestFragment = highlighter.getBestFragment(analyzer,searchWhich,content);
//取得高亮內容並設置
srb.setContent(bestFragment);
//設置標題,全部設置
srb.setTitle(title);
}
//設置日期
srb.setDate(date);
//設置主鍵
srb.setId(id);
//添加到list中,以便在jsp頁面上顯示
list.add(srb);
}
return list;
}
//取得符合搜索條件的所有記錄總數,以便分頁 , 與上面方法類似
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();
}
}
分頁action代碼如下:
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;
//查詢索引實體類
private IndexSearchUtil indexSearcher;
//對應搜索字段是標題還是內容
private String searchWhich;
//對應用戶輸入的搜索內容
private String searchParam;
//對應分頁跳轉到的頁面
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 {
//如果爲空,說明第一次進入分頁
if(jumpPage == null) {
jumpPage = "1";
}
//從request範圍內取得pageControl對象
PageControl pageControl = (PageControl) this.getRequest().getAttribute("pageControl");
//如果爲空,則是第一次分頁,創建分頁對象,並且設置總的記錄條數,以便設置最大頁數
if(pageControl == null) {
pageControl = new PageControl();
pageControl.setMaxRowCount((long)indexSearcher.getResultCount(searchWhich, searchParam));
pageControl.countMaxPage();
}
//設置當前頁
pageControl.setCurPage(Integer.parseInt(jumpPage));
//計算firstResult
int firstResult = (pageControl.getCurPage() - 1) * pageControl.getRowsPerPage() + 1;
//計算從當前條數算還有多少條記錄
long left = pageControl.getMaxRowCount() - firstResult;
int maxResult = -1;
//如果剩餘的記錄數不如每頁顯示數,就設置maxResult爲剩餘條數
if(left < pageControl.getRowsPerPage()) {
maxResult = Integer.valueOf(left + "");
//如果剩餘記錄數大於每頁顯示頁數,就設置maxResult爲每頁條數
}else {
maxResult = pageControl.getRowsPerPage();
}
//取得查詢結果集
List<SearchResultBean> userList = indexSearcher.getSearchResult(searchWhich, searchParam, firstResult, maxResult);
//設置爲pageControl
pageControl.setData(userList);
//將pageControl設置到request範圍,以便在jsp現實結果
this.getRequest().setAttribute("pageControl", pageControl);
//將searchWhich和searchParam設置到request範圍,以便添加到分頁jsp的form裏面的hidden表單域,以便下次分頁時,能夠將值提交過來
this.getRequest().setAttribute("searchWhich", searchWhich);
this.getRequest().setAttribute("searchParam", searchParam);
//跳轉到分頁視圖
return SUCCESS;
}
public IndexSearchUtil getIndexSearcher() {
return indexSearcher;
}
public void setIndexSearcher(IndexSearchUtil indexSearcher) {
this.indexSearcher = indexSearcher;
}
}
搜索的action在struts.xml中設置如下:
<action name="searchAction" class="searchAction" method="search">
<result>/searchResult.jsp</result>
</action>
//searchResult.jsp代碼如下:
<%@ 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} 的搜查結果 -- 最快新聞網</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>
其運行結果如圖所示(按標題搜索):
按內容搜索的運行結果如下:
至此,本小項目的所有功能完成,雖然沒有多少難度,也不是什麼高科技, 俺還是在google和javaeye上查了不少資料,總算是做完了,貼出來,與大家分享,也給新手學習提供資料。
所有的資源我都添加到了附件中,學過ssh的同學應該能夠成功部署項目並運行。
其中NewsWithSearch.rar是工程文件夾,包含了所有的代碼文件和jar包,加壓完直接引到MyEclipse裏就 行,data.rar是所有的sql語句,插入到MySQL之前應先建立數據庫mynews , dic.rar是庖丁解牛用到的字典文件,
解壓成一個文件夾,並配置環境變量PAODING_DIC_HOME,其值就是你把它解壓成的文件夾(例如c:/dic),最後如果你不想創建索引的話,可以把news.rar解壓成一個文件夾,拷貝到c:/index/news下面。
以上是那位牛兄的代碼,實在太多了,機械的粘貼複製也是挺累的。不過堅持就是勝利嗎,終於複製完了。但可能會有篡行或複製錯的地方,請多諒解。
源代碼下載:
SSH + Lucene + 分頁 + 排序 + 高亮 模擬簡單新聞網站搜索引擎--NewsWithSearch.part3
SSH + Lucene + 分頁 + 排序 + 高亮 模擬簡單新聞網站搜索引擎--NewsWithSearch.part2
SSH + Lucene + 分頁 + 排序 + 高亮 模擬簡單新聞網站搜索引擎--NewsWithSearch.part1
SSH + Lucene + 分頁 + 排序 + 高亮 模擬簡單新聞網站搜索引擎--news.part2
SSH + Lucene + 分頁 + 排序 + 高亮 模擬簡單新聞網站搜索引擎--news.part1
SSH + Lucene + 分頁 + 排序 + 高亮 模擬簡單新聞網站搜索引擎--dic
原出處請看:http://www.javaeye.com/post/1068335