搜索引擎的相关搜索（基于struts2框架通过关键字与后台的xml资源进行匹配实现）

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搜索引擎的相关搜索（基于struts2框架通过关键字与后台的xml资源进行匹配实现）

<1>jsp界面：result.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%@ page contentType="text/html;charset=GBK"%>
<%@page import="java.text.SimpleDateFormat"%>
<%@page import="org.apache.commons.lang.ObjectUtils.Null"%>
<%@taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
   + request.getServerName() + ":" + request.getServerPort()
   + path + "/";
%>
<%
  ArrayList<ArrayList<String>> MyList = (ArrayList<ArrayList<String>>) request.getAttribute("bookList");
%>
<%
  String searchType = (String) request.getAttribute("searchType");
  if (null == searchType) {
   searchType = "all";
  }
%>
<%
  int totalPage = 0;
%>
<%
  String str_i = (String) request.getAttribute("i");
%>
<%
  int i = Integer.parseInt(str_i);
%>
<head>
  <title>result</title>
  <base href="<%=basePath%>">
  <meta http-equiv="Content-Type" content="text/html; charset=GBK">
  <meta http-equiv="pragma" content="no-cache">
  <meta http-equiv="cache-control" content="no-cache">
  <meta http-equiv="expires" content="0">
  <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
  <meta http-equiv="description" content="This is my page">
<style type="text/css">

        </style>


</head>
<script type="text/javascript">
var xmlHttpRequest;
function createXmlHttpRequest()
{
if(window.ActiveXObject)
{
try
{
   xmlHttpRequest = new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e)
{
   xmlHttpRequest = new ActiveXObject("Msxml2.XMLHTTP");
}
return xmlHttpRequest;
}
else if(window.XMLHttpRequest)
{
return new XMLHttpRequest();
}
}
function auto()
{
var query = document.getElementById("query");
var auto = document.getElementById("auto");
var tags = document.getElementById("tags");
if(event.keyCode == 40)
{
if(query.value != "" && auto.style.visibility != "hidden")
{
   tags.focus();
   tags.selectedIndex = 0;
   query.value = tags.options[0].text;
   return;
}
}
xmlHttpRequest = createXmlHttpRequest();
xmlHttpRequest.onreadystatechange = backFct;
var url = "AjaxindexAction.action?tag=" + query.value;
xmlHttpRequest.open("get",url,true);
xmlHttpRequest.send(null);
}
function backFct()
{
if(xmlHttpRequest.readyState == 4 && xmlHttpRequest.status == 200)
{
var rs = xmlHttpRequest.responseText;
if(rs != "")
{
   var tagsRs = rs.split(",");
   var auto = document.getElementById("auto");
   var tags = document.getElementById("tags");
   var query = document.getElementById("query");
   tags.length = 0;
   tags.size = tagsRs.length;
   for(var i=0;i<tagsRs.length;i++)
   {
    var option = document.createElement("option");
    option.setAttribute("text", tagsRs[i]);
    tags.options[i] = option;
   }
   auto.style.width = query.style.width;
   tags.style.width = query.style.width;
   auto.style.left = query.offsetLeft - 1;
   auto.style.top = query.offsetTop + query.offsetHeight + 1;
   auto.style.visibility = "visible";
}
else
{
   document.getElementById("auto").style.visibility = "hidden";
}
}
}
function text()
{
var query = document.getElementById("query");
var auto = document.getElementById("auto");
var tags = document.getElementById("tags");
if(event.keyCode == 40 || event.keyCode == 38)
{
if(query.value != "" && auto.style.visibility != "hidden")
{
   query.value = tags.options[tags.selectedIndex].text;
}
}
else if(event.keyCode == 13)
{
auto.style.visibility = "hidden";
query.focus();
}
}
</script>
<script type="text/javascript" src="external.js"></script>

<body>
<div>
  <form action="search.action" method="get" >
   <table border="0" width="400px">
    <tr size="80">

     <td align="center">
      <a
       href="search.action?searchType=all&i=0&keywords=${requestScope.keywords}">
       <%
        if (searchType.equals("all"))
         out.println("<strong>全部</strong>");
        else
         out.println("全部");
       %> </a>
     </td>
     <td align="center">
      <a
       href="search.action?searchType=doc&i=0&keywords=${requestScope.keywords}">
       <%
        if (searchType.equals("doc"))
         out.println("<strong>文档</strong>");
        else
         out.println("文档");
       %> </a>
     </td>
     <td align="center">
      <a
       href="search.action?searchType=mov&i=0&keywords=${requestScope.keywords}">
       <%
        if (searchType.equals("mov"))
         out.println("<strong>视频</strong>");
        else
         out.println("视频");
       %> </a>
     </td>
     <td align="center">
      <a
       href="search.action?searchType=music&i=0&keywords=${requestScope.keywords}">
       <%
        if (searchType.equals("music"))
         out.println("<strong>音乐</strong>");
        else
         out.println("音乐");
       %> </a>
     </td>
     <td align="center">
      <a
       href="search.action?searchType=other&i=0&keywords=${requestScope.keywords}">
       <%
        if (searchType.equals("other"))
         out.println("<strong>其他</strong>");
        else
         out.println("其他");
       %> </a>
     </td>
     <td>
      <br>
      <br>
     </td>
    </tr>
    <tr>
     <td colspan="5">
      <input type="text" name="keywords" id="query" onKeyUp="auto();" style=" 400px; height: 30px; font-size: 18px;"
       value="<%=request.getAttribute("keywords") %>" />
<div id="auto" style="border-style: solid; border- 1px; visibility: hidden; position: absolute;margin-left:12px;margin-top:50px">
                 <select id="tags" onkeyup="text();" size="0" style=" margin:-2px;">
                 </select>
</div>
     </td>
     <td>
      <input type="hidden" name="searchType" value="<%=searchType%>" />
      <input type="hidden" name="i" value="<%=i%>" />
      <input type="submit" style="height:32px; " value="搜索一下" />
     </td>
    </tr>
   </table>
   <table border="0" width="800px">
    <br>
    <HR
     style="FILTER: alpha(opacity =   100, finishopacity =   0, style =   2)"
     width="100%" color="blue" SIZE=10>
    <h1>
     搜索结果：
    </h1>
    <%
     //对搜索结果进行分类计数
     int totalNum = 0;
     if (searchType.equals("all")) {
      for (int m = 0; m < MyList.get(0).size(); m++) {

       totalNum++;

      }
     } else if (searchType.equals("doc")) {
      for (int m = 0; m < MyList.get(0).size(); m++) {
       if (MyList.get(2).get(m).equals("doc")
         || MyList.get(2).get(m).equals("ppt")
         || MyList.get(2).get(m).equals("xls")
         || MyList.get(2).get(m).equals("txt")
         || MyList.get(2).get(m).equals("pdf")) {
        totalNum++;
       }
      }
     } else if (searchType.equals("mov")) {
      for (int m = 0; m < MyList.get(0).size(); m++) {
       if (MyList.get(2).get(m).equals("avi")
         || MyList.get(2).get(m).equals("mpg")
         || MyList.get(2).get(m).equals("3gp")
         || MyList.get(2).get(m).equals("mp4")
         || MyList.get(2).get(m).equals("asf")
         || MyList.get(2).get(m).equals("asx")
         || MyList.get(2).get(m).equals("flv")
         || MyList.get(2).get(m).equals("rmvb")
         || MyList.get(2).get(m).equals("rm")
         || MyList.get(2).get(m).equals("wmv9")
         || MyList.get(2).get(m).equals("mkv")
         || MyList.get(2).get(m).equals("swf")) {
        totalNum++;
       }
      }
     } else if (searchType.equals("music")) {
      for (int m = 0; m < MyList.get(0).size(); m++) {
       if (MyList.get(2).get(m).equals("aac")
         || MyList.get(2).get(m).equals("mp3")) {
        totalNum++;
       }
      }
     } else if (searchType.equals("other")) {
      for (int m = 0; m < MyList.get(0).size(); m++) {
       if (
                  MyList.get(2).get(m).equals("rar")
         || MyList.get(2).get(m).equals("jpeg")
         || MyList.get(2).get(m).equals("rar")
         || MyList.get(2).get(m).equals("gif")
         || MyList.get(2).get(m).equals("jpg")
         || MyList.get(2).get(m).equals("bmp")
         || MyList.get(2).get(m).equals("png")) {
        totalNum++;
       }
      }
     }
    %>

    <%
     //对搜索结果进行分类输出

     if (searchType.equals("all")) {
      for (; i < MyList.get(0).size(); i++) {

    %>
    <a rel="external"
     href="getTitle.action?describe=<%=MyList.get(3).get(i)%>&author=<%=MyList.get(6).get(i)%>
     &kind=<%=MyList.get(2).get(i)%>&title=<%=MyList.get(0).get(i)%>&url=<%=MyList.get(5).get(i)%>" >
     <font
     size="4"> <%
  out.println(MyList.get(0).get(i));
%> </font> </a>
    <br>
    <%
     out.print("<font color='blue'>描述:</font>"
         + MyList.get(3).get(i));
    %>
    <%
     out.print("类型为:" + MyList.get(2).get(i));
    %>  
    <%
     try {
        out.print("<font color='blue'>全文：</font>"
          + MyList.get(8).get(i).substring(0, 100));
       } catch (IndexOutOfBoundsException e) {
        out.print("无内容");
       }
       out.print("....");
    %>
    <font size="2" color="green"> <%
  out.print("作者为:" + MyList.get(6).get(i));
%>   <%
  out.print("出版社:" + MyList.get(7).get(i));
%>   <%
  out.print("url:" + MyList.get(5).get(i));
%>   <%
  out.print("时间:" + MyList.get(4).get(i));
%><br><br> </font>
    <% if ((i + 1) % 10 == 0) {
        break;
       }
     }

     } if (searchType.equals("doc")) {
      for (; i < MyList.get(0).size(); i++) {
       if (MyList.get(2).get(i).equals("doc")
         || MyList.get(2).get(i).equals("ppt")
         || MyList.get(2).get(i).equals("xls")
         || MyList.get(2).get(i).equals("txt")
         || MyList.get(2).get(i).equals("pdf")) {

    %>
    <a rel="external"
     href="getTitle.action?describe=<%=MyList.get(3).get(i)%>&author=<%=MyList.get(6).get(i)%>&
     kind=<%=MyList.get(2).get(i)%>&title=<%=MyList.get(0).get(i)%>&url=<%=MyList.get(5).get(i)%>"><font
     size="4"> <%
  out.println(MyList.get(0).get(i));
%> </font> </a>
    <br>
    <%
     out.print("<font color='blue'>描述:</font>"
          + MyList.get(3).get(i));
    %>
    <%
     out.print("类型为:" + MyList.get(2).get(i));
    %>  
    <%
     try {
         out.print("<font color='blue'>全文：</font>"
           + MyList.get(8).get(i).substring(0, 100));
        } catch (IndexOutOfBoundsException e) {
         out.print("无内容");
        }
        out.print("....");
    %>
    <font size="2" color="green"> <%
  out.print("作者为:" + MyList.get(6).get(i));
%>   <%
  out.print("出版社:" + MyList.get(7).get(i));
%>   <%
  out.print("url:" + MyList.get(5).get(i));
%>   <%
  out.print("时间:" + MyList.get(4).get(i));
%><br><br> </font>
    <%if ((i + 1) % 10 == 0) {
         break;
        }
     }
      }
     } if (searchType.equals("mov")) {
      for (; i < MyList.get(0).size(); i++) {
       if (MyList.get(2).get(i).equals("avi")
         || MyList.get(2).get(i).equals("mpg")
         || MyList.get(2).get(i).equals("3gp")
         || MyList.get(2).get(i).equals("mp4")
         || MyList.get(2).get(i).equals("asf")
         || MyList.get(2).get(i).equals("asx")
         || MyList.get(2).get(i).equals("flv")
         || MyList.get(2).get(i).equals("rmvb")
         || MyList.get(2).get(i).equals("rm")
         || MyList.get(2).get(i).equals("wmv9")
         || MyList.get(2).get(i).equals("mkv")
         || MyList.get(2).get(i).equals("swf")) {

            %>
    <a rel="external"
     href="getTitle.action?describe=<%=MyList.get(3).get(i)%>&author=<%=MyList.get(6).get(i)%>&kind=<%=MyList.get(2).get(i)%>
     &title=<%=MyList.get(0).get(i)%>&url=<%=MyList.get(5).get(i)%>" ><font
     size="4"> <%
  out.println(MyList.get(0).get(i));
%> </font> </a>
    <br>
    <%
     out.print("<font color='blue'>描述:</font>"
          + MyList.get(3).get(i));
    %>
    <%
     out.print("类型为:" + MyList.get(2).get(i));
    %>  
    <%
     try {
         out.print("<font color='blue'>全文：</font>"
           + MyList.get(8).get(i).substring(0, 100));
        } catch (IndexOutOfBoundsException e) {
         out.print("无内容");
        }
        out.print("....");
    %>
    <font size="2" color="green"> <%
  out.print("作者为:" + MyList.get(6).get(i));
%>   <%
  out.print("出版社:" + MyList.get(7).get(i));
%>   <%
  out.print("url:" + MyList.get(5).get(i));
%>   <%
  out.print("时间:" + MyList.get(4).get(i));
%><br> <br></font>
    <%if ((i + 1) % 10 == 0) {
         break;
        }

     }
      }
     } if (searchType.equals("music")) {
      for (; i < MyList.get(0).size(); i++) {
       if (MyList.get(2).get(i).equals("aac")
         || MyList.get(2).get(i).equals("mp3")) {

        if ((i + 1) % 10 == 0) {
         break;
        }
    %>
    <a rel="external"
     href="getTitle.action?describe=<%=MyList.get(3).get(i)%>&author=<%=MyList.get(6).get(i)%>
     &kind=<%=MyList.get(2).get(i)%>&title=<%=MyList.get(0).get(i)%>&url=<%=MyList.get(5).get(i)%>" ><font
     size="4"> <%
  out.println(MyList.get(0).get(i));
%> </font> </a>
    <br>
    <%
     out.print("<font color='blue'>描述:</font>"
          + MyList.get(3).get(i));
    %>
    <%
     out.print("类型为:" + MyList.get(2).get(i));
    %>  
    <%
     try {
         out.print("<font color='blue'>全文：</font>"
           + MyList.get(8).get(i).substring(0, 100));
        } catch (IndexOutOfBoundsException e) {
         out.print("无内容");
        }
        out.print("....");
    %>
    <font size="2" color="green"> <%
  out.print("作者为:" + MyList.get(6).get(i));
%>   <%
  out.print("出版社:" + MyList.get(7).get(i));
%>   <%
  out.print("url:" + MyList.get(5).get(i));
%>   <%
  out.print("时间:" + MyList.get(4).get(i));
%><br><br> </font>
    <%
     }
      }
     } if (searchType.equals("other")) {
      for (; i < MyList.get(0).size(); i++) {
       if (MyList.get(2).get(i).equals("rar")
         || MyList.get(2).get(i).equals("jpeg")
         || MyList.get(2).get(i).equals("rar")
         || MyList.get(2).get(i).equals("gif")
         || MyList.get(2).get(i).equals("jpg")
         || MyList.get(2).get(i).equals("bmp")
         || MyList.get(2).get(i).equals("png")) {


    %>
    <a rel="external"
     href="getTitle.action?describe=<%=MyList.get(3).get(i)%>&author=<%=MyList.get(6).get(i)%>&
     kind=<%=MyList.get(2).get(i)%>&title=<%=MyList.get(0).get(i)%>&url=<%=MyList.get(5).get(i)%>"><font
     size="4"> <%
  out.println(MyList.get(0).get(i));
%> </font> </a>
    <br>
    <%
     out.print("<font color='blue'>描述:</font>"
          + MyList.get(3).get(i));
    %>
    <%
     out.print("类型为:" + MyList.get(2).get(i));
    %>  
    <%
     try {
         out.print("<font color='blue'>全文：</font>"
           + MyList.get(8).get(i).substring(0, 100));
        } catch (IndexOutOfBoundsException e) {
         out.print("无内容");
        }
        out.print("....");
    %>
    <font size="2" color="green"> <%
  out.print("作者为:" + MyList.get(6).get(i));
%>   <%
  out.print("出版社:" + MyList.get(7).get(i));
%>   <%
  out.print("url:" + MyList.get(5).get(i));
%>   <%
  out.print("时间:" + MyList.get(4).get(i));
%><br><br> </font>
    <%if ((i + 1) % 10 == 0) {
         break;
        }
     }
      }
     }
    %>

    <br>
   </table>

   <%if(totalNum%10!=0){
    totalPage = totalNum / 10 + 1;
    }
    else{
    totalPage = totalNum / 10 ;
    }
   %>
   <%
    String string_i;
   %>

   </form>
</div>

  <br>

   <form action="search.action" method="post">
    <table border="0" width="400px">
     <tr size="80">
      <%if(totalPage!=1){
       for (int j = 0; j < totalPage; j++) {
        string_i = String.valueOf(j + 1);
      %>
      <a
       href='search.action?searchType=${requestScope.searchType}&keywords=${requestScope.keywords}&i=<%=j * 10%>'>
       <%
        out.println("第" + string_i + "页");
       %> </a>  
      <%
       }
       }
      %>

    </table>
            </form>
   <div id="split_line">
    <span id="tpl_infor">搜索 <b><s:property value="keywords"
       escape="false" /> </b> 获得约<%=totalNum%>条结果. （用时 <%=MyList.get(9).get(0)%>毫秒）</span>
   </div>
<div id="auto" position: absolute; margin-left:429px; margin-top:230px; left: 489px; top: -52px;">
           相关搜索：
   <% List<String> titlelist = new ArrayList<String>();
      titlelist = (List<String>)request.getAttribute("titlelist");
      %>
      <%
      int b = 1;
      for(int a = 0; a < titlelist.size(); a++){
      if(b%5==0){
      out.print("<br>");
      }
      b++;
      %>
   <a href="search.action?searchType=${requestScope.searchType}&keywords=<%=titlelist.get(a)%>&i=0">
      <%out.println(titlelist.get(a));%>  
   </a>
      <%
      }
    %>

</div>
</body>
</html>

<2>编写字符串相似度比较类：

StringCompare.java

package com.dreamers.search;

public class StringCompare {

private int compare(String str, String target) {

   int d[][]; // 矩阵

   int n = str.length();

   int m = target.length();

   int i; // 遍历str的

   int j; // 遍历target的

   char ch1; // str的

   char ch2; // target的

   int temp; // 记录相同字符,在某个矩阵位置值的增量,不是0就是1

   if (n == 0) {

    return m;

   }

   if (m == 0) {

    return n;

   }

   d = new int[n + 1][m + 1];

   for (i = 0; i <= n; i++) { // 初始化第一列

    d[i][0] = i;

   }

   for (j = 0; j <= m; j++) { // 初始化第一行

    d[0][j] = j;

   }

   for (i = 1; i <= n; i++) { // 遍历str

    ch1 = str.charAt(i - 1);

    // 去匹配target

    for (j = 1; j <= m; j++) {

     ch2 = target.charAt(j - 1);

     if (ch1 == ch2) {

      temp = 0;

     } else {

      temp = 1;

     }

     // 左边+1,上边+1, 左上角+temp取最小

     d[i][j] = min(d[i - 1][j] + 1, d[i][j - 1] + 1, d[i - 1][j - 1]

       + temp);

    }

   }

   return d[n][m];

}

private int min(int one, int two, int three) {

   return (one = one < two ? one : two) < three ? one : three;

}

/**

* 获取两字符串的相似度

*

* @param str

* @param target

* @return

*/

public float getSimilarityRatio(String str, String target) {

   return 1 - (float) compare(str, target)

     / Math.max(str.length(), target.length());

}

/* public static void main(String[] args) {

   StringCompare lt = new StringCompare();

   String str = "ABCDEF";

   String target = "FECDBA";

   System.out.println("similarityRatio="

     + lt.getSimilarityRatio(str, target));

}*/

}

<3>在action里相关代码：

public List<String> titlelist = new ArrayList<String>() ;
public List<String> db = new ArrayList<String>(); //

public List<String> init() throws DocumentException, FileNotFoundException, IOException, ClassNotFoundException
    {

     XmlReader reader = new XmlReader();

     db=reader.getTitle();                                 //读取xml中的资源
     StringCompare it = new StringCompare();
     for(int i = 0 ; i < db.size(); i++){
      if(it.getSimilarityRatio(getKeywords(), db.get(i))>0.3){
     titlelist.add(db.get(i));
      }
     }
     return titlelist;
    }

public List<String> getTitlelist() throws FileNotFoundException, DocumentException, IOException, ClassNotFoundException {
  titlelist = init();
  System.out.println("titlelist :"+titlelist.get(0));
  return titlelist;
}

public void setTitlelist(List<String> titlelist) {
  this.titlelist = titlelist;
}

大概就是这样吧，可能有些问题，呵呵，又事留言吧。

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原文地址：https://www.cnblogs.com/lcqBlogs/p/2392400.html