solr獲取總記錄數

/**
     * 獲取索引庫中總記錄條數
     * @return
     */
    public  long getSolrIndexCount(){
        long num = 0;
        try {
            SolrQuery params = new SolrQuery();
            params.set("q", "*:*");
                   params.setStart(0);  
                   params.setRows(0);//跟這個分頁rows的大小無關
            QueryResponse    rsp = server.query(params);
            SolrDocumentList docs = rsp.getResults();  
            num = docs.getNumFound();//獲取總記錄數
            System.out.println(num);
        } catch (SolrServerException e) {
            e.printStackTrace();
        }     
        return num;
    }