我試圖從數據庫獲取返回值，但它返回[]而不是數據JAVA 寧靜    @RequestMapping("/regLocal")    public List<Map<String, Object>> regist_local(@RequestBody Map<String, Object> params){    Map<String, String> map = new HashMap<String, String>();    String location = (String) params.get("location_name"); // 'country'    String code = (String) params.get("location_code"); // '1'    map.put("location", location);    map.put("code", code);    List<Map<String, Object>> lists = se.selectList(ns+".regLocal", map); // it return []    return lists;}我的鞋<select id="regLocal" resultType="map">    select hll.hll_code hll_code, hll.hll_name hll_name     from hl_local hll, h_location hl    where hll.hl_location = #{code} and hl.hl_name = #{location}</select>在 Oracle DB SQL select 中工作正常，沒有任何問題。但它一直返回這個[]有人知道問題嗎？