返回结果

Map<String,Object> getTotal(String roomNumber）
map.put("waterReceivable",waterReceivable);
map.put("electricReceivable",electricReceivable);
结果
map{electricReceivable=82.62, waterReceivable=130.5}
map{electricReceivable=82.62, rent=100.0, waterReceivable=130.5}