mysql-Hibernate原生sql多表查询在Linux服务器上查询不到数据

mysqllinux服务器 String sql = "SELECT Area.* FROM area AS Area,district AS d WHERE Area.districtid=d.districtid AND Area.areaname= " + areaname + " AND d.districtname=" + cityname + ""; @SuppressWarnings("unchecked") List as = (List) getCurrentSession() .createSQLQuery(sql).addEntity("Area",Area.class).list();