어노테이션 사용 ㅇ

<!-- 파일업로드 관련 라이브러리 -->

<dependency>

<groupId>commons-fileupload</groupId>

<artifactId>commons-fileupload</artifactId>

<version>1.4</version>

</dependency>

<!-- 어노테이션을 사용가능하게 하는 라이브러리 -->

<dependency>

<groupId>javax.annotation</groupId>

<artifactId>javax.annotation-api</artifactId>

<version>1.3.2</version>

</dependency>