javax是属于扩展库中,手动下载
maven依赖地址:http://mvnrepository.com/artifact/javax.annotation/jsr250-api/1.0 下载导入即可。
maven依赖:
<dependency> <groupId>javax.annotation</groupId> <artifactId>jsr250-api</artifactId> <version>1.0</version> </dependency>
感谢:https://blog.csdn.net/luojinbai/article/details/46670105