Hi Marco
I thinks this is what you want. Still some known bugs there, but hope
it will helps or bright you;)
Regards
/Jack
On Apr 7, 2005 8:42 AM, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> Hi!
>
> Does anybody know a code to insert into search.jsp to show the result pages
> list the way that Google does?
> I mean: instead of showing just "Next" button, it could show: "Previous 1 2
> 3 4 5 6 7 8 9 10 Next" and so on
> "Previous 11 12 13 14 15 16 17 18 19 20 21 Next".
>
> Thanks,
> Marco
>
<%@ page
contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"
import="javax.servlet.*"
import="javax.servlet.http.*"
import="java.io.*"
import="java.util.*"
import="java.net.*"
import="org.apache.nutch.html.Entities"
import="org.apache.nutch.searcher.*"
import="org.apache.nutch.plugin.*"
import="org.apache.nutch.clustering.*"
import="org.apache.nutch.util.NutchConf"
%><%!
// NOTE: Dawid Weiss
// these are servlet's class variables. Merely to speed up access
// to them (instead of referencing static objects).
/**
* Number of hits to retrieve and cluster if clustering extension is available
* and clustering is on. By default, 100. Configurable via nutch-conf.xml.
*/
private final static int HITS_TO_CLUSTER =
NutchConf.get().getInt("extension.clustering.hits-to-cluster", 100);
private static int supposedRange = 4;
/**
* An instance of the clustering extension, if available.
*/
private static OnlineClusterer clusterer;
static {
try {
clusterer = OnlineClustererFactory.getOnlineClusterer();
} catch (PluginRuntimeException e) {
// NOTE: Dawid Weiss
// should we ignore plugin exceptions, or rethrow it? Rethrowing
// it effectively prevents the servlet class from being loaded into
// the JVM
}
}
%>
<%--
// Uncomment this to enable query refinement.
// Do the same to "refine-query.jsp" below.
<%@ include file="./refine-query-init.jsp" %>
--%>
<%
NutchBean bean = NutchBean.get(application);
// set the character encoding to use when interpreting request values
request.setCharacterEncoding("UTF-8");
bean.LOG.info("query request from " + request.getRemoteAddr());
// get query from request
String queryString = request.getParameter("query");
// patch for tomcat 4 for chinese
queryString = new String(queryString.getBytes("ISO-8859-1"),"GBK");
queryString = new String(queryString.getBytes("GBK"),"UTF-8");
System.out.println("query string is " + queryString);
if (queryString == null)
queryString = "";
String htmlQueryString = Entities.encode(queryString);
// a flag to make the code cleaner a bit.
boolean clusteringAvailable = (clusterer != null);
String clustering = "";
if (clusteringAvailable && "yes".equals(request.getParameter("clustering")))
clustering = "yes";
int start = 0; // first hit to display
String startString = request.getParameter("start");
if (startString != null)
start = Integer.parseInt(startString);
int hitsPerPage = 5; // number of hits to display
String hitsString = request.getParameter("hitsPerPage");
if (hitsString != null)
hitsPerPage = Integer.parseInt(hitsString);
//int hitsPerSite = 3; // max hits per site
int hitsPerSite = 0;
String hitsPerSiteString = request.getParameter("hitsPerSite");
if (hitsPerSiteString != null)
hitsPerSite = Integer.parseInt(hitsPerSiteString);
int hitsToCluster = HITS_TO_CLUSTER; // number of hits to cluster
Query query = Query.parse(queryString);
bean.LOG.info("query: " + queryString);
String language =
ResourceBundle.getBundle("org.nutch.jsp.search", request.getLocale())
.getLocale().getLanguage();
String requestURI = HttpUtils.getRequestURL(request).toString();
String base = requestURI.substring(0, requestURI.lastIndexOf('/'));
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<%
// To prevent the character encoding declared with 'contentType' page
// directive from being overriden by JSTL (apache i18n), we freeze it
// by flushing the output buffer.
// see http://java.sun.com/developer/technicalArticles/Intl/MultilingualJSP/
out.flush();
%>
<%@ taglib uri="http://jakarta.apache.org/taglibs/i18n"; prefix="i18n" %>
<i18n:bundle baseName="org.nutch.jsp.search"/>
<html lang="<%= language %>">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<head>
<title>Nutch: <i18n:message key="title"/></title>
<link rel="icon" href="/img/favicon.ico" type="image/x-icon"/>
<link rel="shortcut icon" href="/img/favicon.ico" type="image/x-icon"/>
<jsp:include page="/include/style.html"/>
<base href="<%= base + "/" + language %>/">
</head>
<body>
<jsp:include page="<%= language + "/include/header.html"%>"/>
<form name="search" action="../search.jsp" method="get">
<input name="query" size=44 value="<%=htmlQueryString%>">
<input type="hidden" name="hitsPerPage" value="<%=hitsPerPage%>">
<input type="submit" value="<i18n:message key="search"/>">
<% if (clusteringAvailable) { %>
<input id="clustbox" type="checkbox" name="clustering" value="yes" <% if
(clustering.equals("yes")) { %>CHECKED<% } %>>
<label for="clustbox"><i18n:message key="clustering"/></label>
<% } %>
</form>
<%--
// Uncomment this to enable query refinement.
// Do the same to "refine-query-init.jsp" above.
<%@ include file="./refine-query.jsp" %>
--%>
<%
// how many hits to retrieve? if clustering is on and available,
// take "hitsToCluster", otherwise just get hitsPerPage
int hitsToRetrieve = (clusteringAvailable && clustering.equals("yes") ?
hitsToCluster : hitsPerPage);
if (clusteringAvailable && clustering.equals("yes")) {
bean.LOG.info("Clustering is on, hits to retrieve: " + hitsToRetrieve);
}
// perform query
// NOTE by Dawid Weiss:
// The 'clustering' window actually moves with the start
// position.... this is good, bad?... ugly?....
Hits hits = bean.search(query, start + hitsToRetrieve, hitsPerSite);
int end = (int)Math.min(hits.getLength(), start + hitsPerPage);
int length = end-start;
int realEnd = (int)Math.min(hits.getLength(), start + hitsToRetrieve);
Hit[] show = hits.getHits(start, realEnd-start);
HitDetails[] details = bean.getDetails(show);
String[] summaries = bean.getSummary(details, query);
bean.LOG.info("total hits: " + hits.getTotal());
%>
<i18n:message key="hits">
<i18n:messageArg value="<%=new Long((end==0)?0:(start+1))%>"/>
<i18n:messageArg value="<%=new Long(end)%>"/>
<i18n:messageArg value="<%=new Long(hits.getTotal())%>"/>
</i18n:message>
<%
// be responsive
out.flush();
%>
<br><br>
<% if (clustering.equals("yes") && length != 0) { %>
<table border=0 cellspacing="3" cellpadding="0">
<tr>
<td valign="top">
<% } %>
<%
for (int i = 0; i < length; i++) { // display the hits
Hit hit = show[i];
HitDetails detail = details[i];
String title = detail.getValue("title");
String url = detail.getValue("url");
String summary = summaries[i];
String id = "idx=" + hit.getIndexNo() + "&id=" + hit.getIndexDocNo();
if (title == null || title.equals("")) // use url for docs w/o title
title = url;
%>
<b><a href="<%=url%>"><%=Entities.encode(title)%></a></b>
<%@ include file="./more.jsp" %>
<% if (!"".equals(summary)) { %>
<br><%=summary%>
<% } %>
<br>
<span class="url"><%=Entities.encode(url)%></span>
(<a href="../cached.jsp?<%=id%>"><i18n:message key="cached"/></a>)
<%
//queryString = new String(queryString.getBytes("UTF-8"),"GBK");
//queryString = new String(queryString.getBytes("GBK"),"ISO-8859-1");
%>
(<a
href="../explain.jsp?<%=id%>&query=<%=URLEncoder.encode(queryString,"UTF-8")%>"><i18n:message
key="explain"/></a>)
(<a href="../anchors.jsp?<%=id%>"><i18n:message key="anchors"/></a>)
<% if (hit.moreFromSiteExcluded()) {
String more =
"query="+URLEncoder.encode("site:"+hit.getSite()+" "+queryString)
+"&start="+start+"&hitsPerPage="+hitsPerPage+"&hitsPerSite="+0
+"&clustering="+clustering;%>
(<a href="../search.jsp?<%=more%>"><i18n:message key="moreFrom"/>
<%=hit.getSite()%></a>)
<% } %>
<br><br>
<% } %>
<% if (clustering.equals("yes") && length != 0) { %>
</td>
<!-- clusters -->
<td style="border-right: 1px dotted gray;" /> </td>
<td align="left" valign="top" width="25%">
<%@ include file="./cluster.jsp" %>
</td>
</tr>
</table>
<% } %>
<%
if ((hits.totalIsExact() //&& end < hits.getTotal()) // more hits to show
//|| (!hits.totalIsExact() && (hits.getLength() > start+hitsPerPage)))
)){
%>
<%--
<form name="search" action="<%= base %>/search.jsp" method="get">
<input type="hidden" name="query" value="<%=htmlQueryString%>">
<input type="hidden" name="start" value="<%=end%>">
<input type="hidden" name="hitsPerPage" value="<%=hitsPerPage%>">
<input type="hidden" name="hitsPerSite" value="<%=hitsPerSite%>">
<input type="hidden" name="clustering" value="<%=clustering%>">
<input type="submit" value="<i18n:message key="next"/>">
</form>
--%>
<div id=result>
<p>
<%
long curP = end/hitsPerPage + (end%hitsPerPage > 0 ? 1:0); //
current page
end = end % hitsPerPage > 0? (end/hitsPerPage + 1)*hitsPerPage
: end; // end page
long actualRange = hits.getTotal() / hitsPerPage +
(hits.getTotal()%hitsPerPage > 0 ? 1: 0);
long range = Math.min(supposedRange,actualRange);
int pivot = 1; // pivot in the page navigation
int forward = 1; // the distance navigation window will
move forward
if(curP > range)
pivot =
Integer.parseInt(request.getParameter("pivot")) + forward; //FIXME. some bugs
here
%>
<b>Results Page:</b><br>
<%if(curP > 1){%>
<big><b><a
href="../search.jsp?query=<%=htmlQueryString%>&start=<%=end - 2*hitsPerPage
%>&hitsPerPage=<%=hitsPerPage%>&hitsPerSite=<%=hitsPerSite%>&clustering=<%=clustering%>&pivot=<%=pivot%>">Prev</a></b></big>
<a href="../search.jsp?query=<%=htmlQueryString%>&start=<%=end-
2*hitsPerPage
%>&hitsPerPage=<%=hitsPerPage%>&hitsPerSite=<%=hitsPerSite%>&=<%=clustering%>&pivot=<%=pivot%>"><img
src=../img/ar_prev.gif width=7 height=13 border=0 alt=""></a>
<%}%>
<%
long prevStart = 0;
long nextStart = 0;
for(int i=pivot; i< range + pivot; i++)
{
prevStart = end - (curP - i + 1) * hitsPerPage;
// previouse
nextStart = end + (i - curP - 1) * hitsPerPage;
// next
if( i < curP )
out.println("<a
href=\"../search.jsp?query=" + htmlQueryString + "&start=" + prevStart +
"&hitsPerPage=" + hitsPerPage + "&hitsPerSite=" + hitsPerSite + "&clustering="
+ clustering + "&pivot=" + pivot + "\" title=\"Results " + (prevStart + 1) + "
- " + (prevStart + hitsPerPage) + "\"> "+ i + "</a> ");
else
if( i == curP)
out.println(i + " ");
else
out.println("<a
href=\"../search.jsp?query=" + htmlQueryString + "&start=" + nextStart +
"&hitsPerPage=" + hitsPerPage + "&hitsPerSite=" + hitsPerSite + "&clustering="
+ clustering + "&pivot=" + pivot + "\" title=\"Results " + (nextStart +
hitsPerPage + 1) + " - " + (Math.min(nextStart + 2 *
hitsPerPage,hits.getTotal())) + "\"> "+ i + "</a> ");
}
%>
<%if((end < hits.getTotal())){%>
<a
href="../search.jsp?query=<%=htmlQueryString%>&start=<%=end%>&hitsPerPage=<%=hitsPerPage%>&hitsPerSite=<%=hitsPerSite%>&=<%=clustering%>"><img
src=../img/ar_next.gif width=7 height=13 border=0 alt=""></a>
<big><b><a
href="../search.jsp?query=<%=htmlQueryString%>&start=<%=end%>&hitsPerPage=<%=hitsPerPage%>&hitsPerSite=<%=hitsPerSite%>&clustering=<%=clustering%>&pivot=<%=pivot%>">Next</a></b></big>
<%}%>
</p>
</div>
<%
}
if ((!hits.totalIsExact() && (hits.getLength() <= start+hitsPerPage))) {
%>
<form name="search" action="../search.jsp" method="get">
<input type="hidden" name="query" value="<%=htmlQueryString%>">
<input type="hidden" name="hitsPerPage" value="<%=hitsPerPage%>">
<input type="hidden" name="hitsPerSite" value="0">
<input type="hidden" name="clustering" value="<%=clustering%>">
<input type="submit" value="<i18n:message key="showAllHits"/>">
</form>
<%
}
%>
<p>
<!--a href="http://www.nutch.org/";>
<img border="0" src="/img/poweredbynutch_01.gif">
</a-->
<jsp:include page="/include/footer.html"/>
</body>
</html>
