solr分组查询

 public static HttpSolrServer server = new HttpSolrServer("http://localhost:8080/solr/");public static void main(String[] args) {queryAll();}public static void queryAll(){Map rmap = new LinkedHashMap(); try {  SolrQuery query = new SolrQuery();  query.setQuery("title:中国");//如果没有查询语句，必须这么写，否则会报异常  query.setIncludeScore(false);//是否按每组数量高低排序  query.setFacet(true);//是否分组查询  query.setRows(0);//设置返回结果条数，如果你时分组查询，你就设置为0  query.setFacetSort(true);//分组是否排序  query.setFacetLimit(4);//限制每次返回结果数  query.addFacetField("resourcetype");//增加分组字段  //query.addFacetField("price");//增加分组字段  query.addFacetQuery("price:[4 TO 5]"); // query.setSortField("price",asc ? SolrQuery.ORDER.asc :SolrQuery.ORDER.desc );//分组排序字段  QueryResponse rsp = server.query( query );       List returnList = rsp.getFacetField("price").getValues();//这里要和addFacetField相对应    for (Count count : returnList) {   if(count.getCount()>0)    rmap.put(count.getName(), (int) count.getCount());  }  System.out.println(rmap); } catch (Exception e) {  e.printStackTrace(); }}