避免在没有输入的情况下，两个 null 键报错
避免在没有输入的情况下，两个 null 键报错

pinclub/pinclub,zaiyu-dev/club,yorkie/nodeclub,zaiyu-dev/club,cnodejs/nodeclub,cnodejs/nodeclub,honger05/nodeclub,zaiyu-dev/club,Lottid/nodeclub,pinclub/pinclub,pinclub/pinclub,jayfans3/nodeclub,honger05/nodeclub,jayfans3/nodeclub,Lottid/nodeclub