solr分组查询，

solr分组查询，

1. 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();
    }
   }