solr中facet和group的使用_groupcommand.getgroupvalue-优快云博客

本文链接：https://blog.youkuaiyun.com/sexy_it/article/details/24789847

本文展示如何在Solr中利用facet和group参数进行分组统计，具体应用包括品牌ID的分组及类别数据的聚合。通过设置查询参数，实现按品牌ID分组并统计每个类别的商品数量。

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solr中进行分组统计的应用例子（facet 和 group同时使用）：

public class solr {
	String url = "";
	SolrServer server = server = new HttpSolrServer(url);
	SolrQuery query = new SolrQuery();
	query.setQuery("*:*");
	query.setParam(GroupParams.GROUP, true);  
	query.setParam(GroupParams.GROUP_FIELD, "brandId");  
	query.set("facet", "on");
	query.set("facet.field","category");
	query.set("facet.mincount", "1");
	query.set("facet.limit", "15");
	QueryResponse response = server.query(query);
	FacetField categoryField = response.getFacetField("category");
	if (navFirstfacetField != null) {
		counts = categoryField.getValues();
		if (counts != null) {
			for (Count count : counts) {
				System.out.println("分类名称:"+count.getName()+"  分类商品数量:"+count.getCount());
			}
	 }
	}
	GroupResponse groupResponse = response.getGroupResponse(); 
	if(groupResponse != null) {  
	    List<GroupCommand> groupList = groupResponse.getValues();  
	    for(GroupCommand groupCommand : groupList) {
	    	total = groupCommand.getMatches();
	        List<Group> groups = groupCommand.getValues();  
	        for(Group group : groups) {  
	        	String brandId = group.getGroupValue();
	        	int brandNum =  group.getResult().getNumFound();
	        	String brandName = null;
	        	SolrDocumentList docList = group.getResult();
	        	for (SolrDocument doc : docList) {
	        		brandName = StringUtil.convertStr(doc.getFieldValue("brandName"));
	        	}
	        	System.out.println("brandId:"+brandId+"  brandNum:"+brandNum+"  brandName:"+brandName);
	        }  
	    }  
	}
}