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<String, Integer> rmap = new LinkedHashMap<String, Integer>();  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<Count> 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();  } }