JSP, Solr - How to get fields from an Interator

Greenhorn

Posts: 6

posted 9 years ago

Hi,

I am new to Java (though not to JavaScript or JQuery). I have a standalone JSP that gets results from Solr. In the iterator, how can I break out the fields so I can display them similar to this:

<div>ItemID: <%=result.getItemID()%></div>
<div>ItemName: <%=result.getItemName()%></div>
<div>ItemImage: <%=result.getItemImage()%></div>
<div>CategoryID: <%=result.getCategoryID()%></div>
<div>CategoryName: <%=result.getCategoryName()%></div>
<div>ParentCategoryID: <%=result.getParentCategoryID()%></div>

Here's the code:

<%@page import="org.apache.solr.client.solrj.SolrQuery"%>
<%@page import="java.util.Map"%>
<%@page import="java.util.Set"%>
<%@page import="java.util.Iterator"%>
<%@page import="org.apache.solr.client.solrj.SolrServer"%>
<%@page import="org.apache.solr.client.solrj.impl.CommonsHttpSolrServer"%>
<%@page import="org.apache.solr.client.solrj.response.QueryResponse"%>
<%@page import="org.apache.solr.common.SolrDocumentList"%>
<%@page import="java.util.List"%>
<%@page import="org.apache.solr.client.solrj.response.FacetField"%>
<%@page import="org.apache.solr.common.SolrDocument"%><html>
<head>
	<title>Solr Example 1 - Searching Data</title>
</head>
<body>
	<h1>Searching Data on the Solr Index</h1>

<%
	SolrQuery solrQuery = new SolrQuery();
	solrQuery.setFacet(true);
	solrQuery.setFacetMinCount(1);
	solrQuery.setRows(new Integer(5));
	solrQuery.setStart(new Integer(0));
	solrQuery.addFacetField("cgynam");

// here I am definitely cheating!
	solrQuery.setQuery("girl");
	
	Map parameterMap = request.getParameterMap();
	Set keySet = parameterMap.keySet();
	Iterator parameterMapIterator = keySet.iterator();
	while(parameterMapIterator.hasNext()) {
		String key = (String)parameterMapIterator.next();
		String[] values = (String[])parameterMap.get(key);

}

SolrServer solrServer = new CommonsHttpSolrServer("http://localhost:8080/solr/");
	
	QueryResponse queryResponse = solrServer.query(solrQuery);
	pageContext.setAttribute("queryResponse", queryResponse);
%>

<h2>Returned QueryResponse Header</h2>

<h2>Search Results Metadata</h2>

<ul>
	<li>Elapsed Time:<%=((QueryResponse)pageContext.getAttribute("queryResponse")).getElapsedTime() %></li>
	<li>Query Time:<%=((QueryResponse)pageContext.getAttribute("queryResponse")).getQTime() %></li>
	<li>Number Of Results:<%=((SolrDocumentList)((QueryResponse)pageContext.getAttribute("queryResponse")).getResponse().get("response")).getNumFound()%></li>
</ul>

<h2>Facets</h2>

<ul>
<%
	List<FacetField> facetFields = ((QueryResponse)pageContext.getAttribute("queryResponse")).getFacetFields();

Iterator<FacetField> facetFieldIterator = facetFields.iterator();
	
	while(facetFieldIterator.hasNext()) {
		FacetField facetField = facetFieldIterator.next();
		out.print("<li>" + facetField.getName());
		
		out.print("<ul>");
		List<FacetField.Count> facetFieldCounts = facetField.getValues();
		Iterator<FacetField.Count> facetFieldCountIterator = facetFieldCounts.iterator();

boolean hasQueryString = false;
		while(facetFieldCountIterator.hasNext()) {
			FacetField.Count count = facetFieldCountIterator.next();
			StringBuffer stringBuffer = new StringBuffer("?");

if(request.getQueryString() != null) {
				stringBuffer.append(request.getQueryString());
				hasQueryString = true;
			}
			
			if(hasQueryString) {
				stringBuffer.append("&");
			}
			
			stringBuffer.append(facetField.getName() + "=" + count.getName());
			
			// if we alread have a parameter - remove it
			String removeLink = null;
			if(null != request.getQueryString()) {
				removeLink = request.getRequestURI() + "?" + request.getQueryString();
				removeLink = removeLink.replaceAll(facetField.getName() + "=" + count.getName(), "");
			}
			
			if(null != request.getQueryString() && request.getQueryString().contains(facetField.getName() + "=" + count.getName())) {
				out.print("<li>" + count.getName() + "(" + count.getCount() + ")<a href=\"" + removeLink + "\">(remove)</a></li>");
			} else {
				out.print("<li><a href=\"" + request.getRequestURI() + stringBuffer.toString() + "\">" + count.getName() + "(" + count.getCount() + ")</a></li>");
			}
			
		}
		out.print("</ul></li>");
	}
%>
</ul>

<h2>Results</h2>
<ul>

<%
	SolrDocumentList solrDocumentList = ((QueryResponse)pageContext.getAttribute("queryResponse")).getResults();

Iterator<SolrDocument> solrDocumentIterator =  solrDocumentList.iterator();
	while(solrDocumentIterator.hasNext()) {

//out.print("<li>" + solrDocumentIterator.next() + "</li>");

}
%>
</ul>
</body>
</html>

Here's the current output:

Searching Data on the Solr Index
Returned QueryResponse Header

{status=0,QTime=0,params={facet=true,facet.mincount=1,start=0,q=widget,facet.field=cgynam,wt=javabin,rows=5,version=1}}
Search Results Metadata

* Elapsed Time:0
* Query Time:0
* Number Of Results:583

Facets

* cgynam
o Clearance(68)
o New For 2009(57)

Results

* SolrDocument[{itmnam=Widget 1, cgyid=1000, cgynam=Classic}]
* SolrDocument[{itmnam=Widget 2, cgyid=1000, cgynam=Clearance}]
* SolrDocument[{itmnam=Widget 3, cgyid=1000, cgynam=Clearance}]
* SolrDocument[{itmnam=Widget 4, cgyid=1000, cgynam=Clearance}]
* SolrDocument[{itmnam=Widget 5, cgyid=1000, cgynam=Clearance}]

Ninad Kulkarni

Ranch Hand

Posts: 811

I like...

posted 9 years ago

UseCodeTags because it will be easier to read code.

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