在JSP中实现全文检索（详解）

http://www.weblogic.com.cn/forum/view.jsp?id=0000000143&ZT=0000000006原文在此
下面的代码是全文检索主体javabean的代码：newsSearch.java package NEWS;
import java.sql.*;
import java.lang.*;
import java.text.*;
import java.util.*;
import java.io.*;
import java.util.regex.*;
import DBstep.iDBManager2000;//数据库操作的bean public class newsSearch {
private String filePath=null;//主体新闻存放的目录
private String keyWord=null;//查询关键字
private Vector news = new Vector();//存放符合条件的结果
public newsSearch() { }
public void setFilePath(String s) {
this.filePath=s;
} public void setKeyWord(String s) {
this.keyWord=s;
} public Vector getResult() {
return news;
} public void search() {
//打开数据库
ResultSet result=null;
String mSql=null;
PreparedStatement prestmt=null;
DBstep.iDBManager2000 DbaObj=new DBstep.iDBManager2000();
DbaObj.OpenConnection(); try {
//检索所有的新闻
mSql="select * from t_news_detail order by release_time desc";
result=DbaObj.ExecuteQuery(mSql);
while(result.next())
{
String id=result.getString("id");
String title=result.getString("title");
String release_time=result.getString("release_time");
String news_type=result.getString("type");
String content=result.getString("content");
String man_add=result.getString("man_add");
//按行读文件
String trace=filePath+content+".html";
FileReader myFileReader=new FileReader(trace);
BufferedReader myBufferedReader=new BufferedReader(myFileReader);
String myString=null;
String resultString=new String();
while((myString=myBufferedReader.readLine())!=null)
{
resultString=resultString+myString;
} //去掉多余字符 HtmlEncode.HtmlEncode Html=new HtmlEncode.HtmlEncode();//这个bean去掉多余的字符，新闻是自己生成的文件，可以尽量多的删除多余字符
resultString=Html.TextEncode(resultString);
myFileReader.close();
//取出查询关键字
Pattern p=null;
Matcher m=null;
p = Pattern.compile("\+");
String[] a=p.split(keyWord);//把关键字用+分开
//全文检索
String searchResult="1";//检索结果
int i;
for(i=0;i<a.length;i++)//逐个按关键字查找，如果所有的关键字都符合，则记录结果
{
p = Pattern.compile(a[i].toString());
m = p.matcher(resultString);
if (!(m.find())) {
searchResult="0";
}
}
//记录符合条件的新闻
if(searchResult.equals("1"))
{
News resultNews=new News();//存放结果的类，和数据库的结构基本一致
resultNews.content=content;
resultNews.release_time=release_time;
resultNews.type=news_type;
resultNews.man_add=man_add;
resultNews.title=title;
news.addElement(resultNews);//最后的结果集，要返回客户端
}
} //关闭数据库
DbaObj.CloseConnection() ;
}catch(Exception e){
System.out.println(e.toString());
}
} public class News { //存放结果的类
String content;
String release_time;
String type;
String man_add;
String title;
public String getContent() { return this.content; }
public String getTitle() { return this.title; }
public String getTime() { return this.release_time; }
public String getType() { return this.type; }
public String getMan_add() { return this.man_add; }
}
}
下面的代码是调用的：aftsearch.jsp <%@ page contentType="text/html; charset=gb2312" %>
<%@ page import="java.util.*" %>
<%
request.setCharacterEncoding("GB2312");
String keyword=request.getParameter("keyword"); //接收关键字
String trace=getServletContext().getRealPath("/")+"xwxx\news\";//主体新闻存放路径
NEWS.newsSearch newsSearch=new NEWS.newsSearch();//初始化检索的bean
newsSearch.setFilePath(trace);//设置主体新闻路径
newsSearch.setKeyWord(keyword);//设置关键字
newsSearch.search();//检索
Vector news=newsSearch.getResult();//取到结果
%> <html>
<head>
<title>新闻搜索</title>
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache">
<link rel="stylesheet" href="../css/style3.css"> <script LANGUAGE="javascript">
function open_window(id)
{
locat="./news/"+id+".html";
window.open(locat,"new","width=550,height=500 ,scrollbars=yes")
}
</script>
</head>
<object id=hh2 classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">
<param name="Command" value="Maximize"></object>
<body bgcolor=#F5FAF3 leftmargin="0" topmargin="0" marginwidth="0" marginheight="0">
<script>
hh2.Click();
</script> <table width="621" border="0">
<tr>
<td colspan=5> </font>
</td>
</tr>
<tr valign="middle">
<td width="45%" height="22">
<div align="center" class = "t_header">标题</div>
</td>
<td width="15%" height="22">
<div align="center" class = "t_header">类别</div>
</td>
<td width="15%" height="22">
<div align="center" class = "t_header">发布人</div>
</td>
<td width="25%" height="22">
<div align="center" class = "t_header">发布时间</div>
</td>
</tr>
<tr bgcolor="#B7D79F" valign="middle">
<td colspan="4" height="2"></td>
</tr>
</table>
<table width="624" border="0" bordercolor="#99CCFF">
<%
String color=null;
int j=0;
if(!(news.size()==0)) {
for (int i = 0; i < news.size(); i++) {
j++;
NEWS.newsSearch.News myNews=(NEWS.newsSearch.News)news.get(i);
if(i%2==0)
{ color="#F5FAF3"; }
else { color="#DBF7ED"; }
%>
<tr bgcolor = "<%=color%>">
<td width="45%" height="20">
<img src="./images/dot.gif" align = "absmiddle">
<a href="#" onClick="open_window(<%=myNews.getContent()%>)"> <%=myNews.getTitle()%></a>
</td>
<td width="15%" height="20" align="center">
<%=myNews.getType()%>
</td>
<td width="15%" height="20" align="center">
<%=myNews.getMan_add()%>
</td>
<td width="25%" height="20" align="center">
<%=myNews.getTime()%>
</td>
</tr>
<% } } else{ out.println("对不起，没有搜索到您要查找的新闻");} //和最前边的else对应,判断是否有记录 %> <tr bgcolor="#B7D79F">
<td colspan="4" height="2"></td>
</tr>
<tr>
<td colspan=4>
<p align=right> </td>
</tr> </table>
<P align=center> 共搜索到新闻 <%=j%> 条
</body>
</html>

调试易

在JSP中实现全文检索（详解）

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