SSH + Lucene + 分页 + 排序 + 高亮 模拟简单新闻网站搜索引擎
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。
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).
- 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;
- }
- }
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)
- 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;
- }
- }
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:
- 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);
- //台湾新闻
- //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 台湾 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);
- }
- }
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); //台湾新闻 //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 台湾 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
- @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();
- }
- });
- }
@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(); } }); }
只用到了一个 NewsManagerImpl
- package com.zly.test.service.impl;
- import java.util.List;
- import com.zly.test.dao.NewsItemDao;
- import com.zly.test.entity.NewsItem;
- import com.zly.test.service.NewsManager;
- public class NewsManagerImpl implements NewsManager {
- //新闻条目dao
- private NewsItemDao newsItemDao;
- public NewsItemDao getNewsItemDao() {
- return newsItemDao;
- }
- public void setNewsItemDao(NewsItemDao newsItemDao) {
- this.newsItemDao = newsItemDao;
- }
- //根据分页得到内容
- public List<NewsItem> getNewsItemByFirstResultAndMaxResult(int firstResult,
- int maxResult , int type) {
- return newsItemDao.getNewsItemByFirstResultAndMaxResult(firstResult, maxResult , type);
- }
- //得到总记录数,以便计算总页数
- public Long getItemCounts(int id) {
- return newsItemDao.getItemCount(id);
- }
- //通过id得到具体新闻
- public NewsItem getNewsById(int id) {
- return newsItemDao.get(id);
- }
- //通过id得到所属新闻类别的id
- public int getNewsType(int id) {
- return newsItemDao.getNewsType(id);
- }
- }
package com.zly.test.service.impl; import java.util.List; import com.zly.test.dao.NewsItemDao; import com.zly.test.entity.NewsItem; import com.zly.test.service.NewsManager; public class NewsManagerImpl implements NewsManager { //新闻条目dao private NewsItemDao newsItemDao; public NewsItemDao getNewsItemDao() { return newsItemDao; } public void setNewsItemDao(NewsItemDao newsItemDao) { this.newsItemDao = newsItemDao; } //根据分页得到内容 public List<NewsItem> getNewsItemByFirstResultAndMaxResult(int firstResult, int maxResult , int type) { return newsItemDao.getNewsItemByFirstResultAndMaxResult(firstResult, maxResult , type); } //得到总记录数,以便计算总页数 public Long getItemCounts(int id) { return newsItemDao.getItemCount(id); } //通过id得到具体新闻 public NewsItem getNewsById(int id) { return newsItemDao.get(id); } //通过id得到所属新闻类别的id public int getNewsType(int id) { return newsItemDao.getNewsType(id); } }
在applicationContext-action.xml中配置action类别
- <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>
<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>
其中定一个两个map , 因为主页的查看分类新闻的url是采用的这种形式<a href="newsAction.action?category=china" target="_blank">国内</a> 名字为map的Map中保存信息如下
- <bean id="map" class="java.util.HashMap">
- <constructor-arg>
- <map>
- <entry key="china" value="1###国内新闻" />
- <entry key="world" value="2###国际新闻" />
- <entry key="society" value="3###社会新闻" />
- <entry key="compatriot" value="4###港台新闻" />
- <entry key="taiwan" value="5###台湾新闻" />
- <entry key="huaren" value="6###华人新闻" />
- <entry key="economic" value="7###经济新闻" />
- <entry key="wenhua" value="8###文化新闻" />
- <entry key="entertainment" value="9###娱乐新闻" />
- <entry key="sports" value="10###体育新闻" />
- <entry key="jiaoyu" value="11###教育新闻" />
- <entry key="jiankang" value="12###健康新闻" />
- <entry key="life" value="13###生活新闻" />
- <entry key="keji" value="14###科技新闻" />
- </map>
- </constructor-arg>
- </bean>
<bean id="map" class="java.util.HashMap"> <constructor-arg> <map> <entry key="china" value="1###国内新闻" /> <entry key="world" value="2###国际新闻" /> <entry key="society" value="3###社会新闻" /> <entry key="compatriot" value="4###港台新闻" /> <entry key="taiwan" value="5###台湾新闻" /> <entry key="huaren" value="6###华人新闻" /> <entry key="economic" value="7###经济新闻" /> <entry key="wenhua" value="8###文化新闻" /> <entry key="entertainment" value="9###娱乐新闻" /> <entry key="sports" value="10###体育新闻" /> <entry key="jiaoyu" value="11###教育新闻" /> <entry key="jiankang" value="12###健康新闻" /> <entry key="life" value="13###生活新闻" /> <entry key="keji" value="14###科技新闻" /> </map> </constructor-arg> </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:
- 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);
- }
- }
- }
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:
- <%@ 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>
<%@ 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
- <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>
<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>
NewsAction代码如下:
- package com.zly.test.action;
- import java.util.List;
- import java.util.Map;
- import com.zly.test.entity.NewsItem;
- import com.zly.test.entity.PageControl;
- import com.zly.test.service.NewsManager;
- public class NewsAction extends BaseAction {
- private static final long serialVersionUID = 7780804627621048756L;
- //对应分页jsp中的跳转到第几页
- private String jumpPage;
- //对应url?category的值
- private String category;
- //对新闻数据进行处理
- private NewsManager newsManager;
- //保存<entry key="china" value="1###国内新闻" />这样的信息
- private Map<String , String> map;
- //保存<entry key="1" value="china###国内新闻" />这样的信息
- private Map<String , String> map1;
- public Map<String, String> getMap1() {
- return map1;
- }
- public void setMap1(Map<String, String> map1) {
- this.map1 = map1;
- }
- public Map<String, String> getMap() {
- return map;
- }
- public void setMap(Map<String, String> map) {
- this.map = map;
- }
- public String getJumpPage() {
- return jumpPage;
- }
- public void setJumpPage(String jumpPage) {
- this.jumpPage = jumpPage;
- }
- public NewsManager getNewsManager() {
- return newsManager;
- }
- public void setNewsManager(NewsManager newsManager) {
- this.newsManager = newsManager;
- }
- //处理newsAction.action?category=xxx
- public String execute() {
- //得到相应的 1###国内新闻
- String typeIdInfo = map.get(category);
- //这里得到的是新闻类别id
- Integer typeId = Integer.parseInt(typeIdInfo.split("###")[0]);
- //这里得到的是新闻类别字符串
- String typeString = typeIdInfo.split("###")[1];
- //将上面三个变量保存在session中,在jsp页面中显示
- this.getSession().setAttribute("category", category);
- this.getSession().setAttribute("typeString" , typeString);
- this.getSession().setAttribute("id", typeId);
- //跳转到pageAction中,处理分页
- return SUCCESS;
- }
- public String pageAction() {
- //取出新闻类别id
- Integer id = (Integer) this.getSession().getAttribute("id");
- //查看是不是第一次来分页,如果是,当前页设置成第一个
- if(jumpPage == null) {
- jumpPage = "1";
- }
- //从request范围内取出PageControl , 如为空,则第一次分页,创建pageControl对象
- PageControl pageControl = (PageControl) this.getRequest().getAttribute("pageControl");
- if(pageControl == null) {
- pageControl = new PageControl();
- //第一次的时候得到相应新闻类别所对应的记录的总数
- pageControl.setMaxRowCount(newsManager.getItemCounts(id));
- //计算一共多少页
- pageControl.countMaxPage();
- }
- //设置jumpPage的值为当前页
- pageControl.setCurPage(Integer.parseInt(jumpPage));
- //计算出hibernate中firstResult的值
- int firstResult = (pageControl.getCurPage() - 1) * pageControl.getRowsPerPage() + 1;
- //设置hibernate中maxResult的值
- int maxResult = pageControl.getRowsPerPage();
- //利用hibernate得到当前页的数据,并保存在pageControl分页实体类中
- List<NewsItem> userList = newsManager.getNewsItemByFirstResultAndMaxResult(firstResult, maxResult , id);
- pageControl.setData(userList);
- //将分页实体类保存在request范围内。
- this.getRequest().setAttribute("pageControl", pageControl);
- //将页面视图跳转到result.jsp
- return SUCCESS;
- }
- public String showDetail() {
- //得到url中的?id=xxx
- String newsId = this.getRequest().getParameter("id");
- int id = Integer.parseInt(newsId);
- //使用hibernate得到具体id的新闻记录
- NewsItem item = newsManager.getNewsById(id);
- //得到id记录所对应的新闻类型的值 map1这种形式<entry key="1" value="china###国内新闻" />
- int typeId = newsManager.getNewsType(id);
- //得到china,添加到jsp页面的<a href="newsAction?category=">里面
- String category = map1.get("" + typeId).split("###")[0];
- //得到国内新闻,显示在jsp页面的多个位置
- String typeString = map1.get("" + typeId).split("###")[1];
- //将以上多个数据添加到request范围内,以便显示。
- this.getRequest().setAttribute("news", item);
- this.getRequest().setAttribute("category", category);
- this.getRequest().setAttribute("typeString", typeString);
- return SUCCESS;
- }
- public String getCategory() {
- return category;
- }
- public void setCategory(String category) {
- this.category = category;
- }
- }
package com.zly.test.action; import java.util.List; import java.util.Map; import com.zly.test.entity.NewsItem; import com.zly.test.entity.PageControl; import com.zly.test.service.NewsManager; public class NewsAction extends BaseAction { private static final long serialVersionUID = 7780804627621048756L; //对应分页jsp中的跳转到第几页 private String jumpPage; //对应url?category的值 private String category; //对新闻数据进行处理 private NewsManager newsManager; //保存<entry key="china" value="1###国内新闻" />这样的信息 private Map<String , String> map; //保存<entry key="1" value="china###国内新闻" />这样的信息 private Map<String , String> map1; public Map<String, String> getMap1() { return map1; } public void setMap1(Map<String, String> map1) { this.map1 = map1; } public Map<String, String> getMap() { return map; } public void setMap(Map<String, String> map) { this.map = map; } public String getJumpPage() { return jumpPage; } public void setJumpPage(String jumpPage) { this.jumpPage = jumpPage; } public NewsManager getNewsManager() { return newsManager; } public void setNewsManager(NewsManager newsManager) { this.newsManager = newsManager; } //处理newsAction.action?category=xxx public String execute() { //得到相应的 1###国内新闻 String typeIdInfo = map.get(category); //这里得到的是新闻类别id Integer typeId = Integer.parseInt(typeIdInfo.split("###")[0]); //这里得到的是新闻类别字符串 String typeString = typeIdInfo.split("###")[1]; //将上面三个变量保存在session中,在jsp页面中显示 this.getSession().setAttribute("category", category); this.getSession().setAttribute("typeString" , typeString); this.getSession().setAttribute("id", typeId); //跳转到pageAction中,处理分页 return SUCCESS; } public String pageAction() { //取出新闻类别id Integer id = (Integer) this.getSession().getAttribute("id"); //查看是不是第一次来分页,如果是,当前页设置成第一个 if(jumpPage == null) { jumpPage = "1"; } //从request范围内取出PageControl , 如为空,则第一次分页,创建pageControl对象 PageControl pageControl = (PageControl) this.getRequest().getAttribute("pageControl"); if(pageControl == null) { pageControl = new PageControl(); //第一次的时候得到相应新闻类别所对应的记录的总数 pageControl.setMaxRowCount(newsManager.getItemCounts(id)); //计算一共多少页 pageControl.countMaxPage(); } //设置jumpPage的值为当前页 pageControl.setCurPage(Integer.parseInt(jumpPage)); //计算出hibernate中firstResult的值 int firstResult = (pageControl.getCurPage() - 1) * pageControl.getRowsPerPage() + 1; //设置hibernate中maxResult的值 int maxResult = pageControl.getRowsPerPage(); //利用hibernate得到当前页的数据,并保存在pageControl分页实体类中 List<NewsItem> userList = newsManager.getNewsItemByFirstResultAndMaxResult(firstResult, maxResult , id); pageControl.setData(userList); //将分页实体类保存在request范围内。 this.getRequest().setAttribute("pageControl", pageControl); //将页面视图跳转到result.jsp return SUCCESS; } public String showDetail() { //得到url中的?id=xxx String newsId = this.getRequest().getParameter("id"); int id = Integer.parseInt(newsId); //使用hibernate得到具体id的新闻记录 NewsItem item = newsManager.getNewsById(id); //得到id记录所对应的新闻类型的值 map1这种形式<entry key="1" value="china###国内新闻" /> int typeId = newsManager.getNewsType(id); //得到china,添加到jsp页面的<a href="newsAction?category=">里面 String category = map1.get("" + typeId).split("###")[0]; //得到国内新闻,显示在jsp页面的多个位置 String typeString = map1.get("" + typeId).split("###")[1]; //将以上多个数据添加到request范围内,以便显示。 this.getRequest().setAttribute("news", item); this.getRequest().setAttribute("category", category); this.getRequest().setAttribute("typeString", typeString); return SUCCESS; } public String getCategory() { return category; } public void setCategory(String category) { this.category = category; } }
首页页面index.jsp,里面有几个分类超链接和搜索对话框
- <%@ 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=taiwan" target="_blank">台湾</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>
<%@ 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=taiwan" target="_blank">台湾</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:
- <%@ 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="${news.publishTime}" pattern="MM-dd HH:mm"/>
- </span>
- <br />
- </div>
- </c:forEach>
- </div>
- <br /><br /><br /><br />
- <%@ include file="page.jsp" %>
- </div>
- </body>
- </html>
<%@ page language="java" contentType="text/html;charset=utf-8" pageEncoding="utf-8"%> <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>${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
- 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();
- }
- }
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:
- 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();
- }
- }
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:
- 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;
- }
- }
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:
- <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:
- <%@ 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 } ${result.date }</font>
- </span>
- <br />
- </div>
- </c:forEach>
- </div>
- <br /><br /><br /><br />
- <%@ include file="searchPage.jsp" %>
- </div>
- </body>
- </html>
<%@ page language="java" contentType="text/html;charset=utf-8" pageEncoding="utf-8"%> <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>${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>
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。
原文地址:http://shuaigg-babysky.iteye.com/blog/414477
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