[Server] Tomcat 설치 환경.

[JDK 버전 확인]

Jsp, Servlet, tomcat, jdk 의 호환 되는 버전 확인 후 사용 해야 한다.

Servlet Spec	JSP Spec	EL Spec	WebSocket Spec	Apache Tomcat version	Actual release revision	Support Java Versions
4.0	TBD (2.4?)	TBD (3.1?)	TBD (1.2?)	9.0.x	None	8 and later
3.1	2.3	3.0	1.1	8.0.x	8.0.15	7 and later
3.0	2.2	2.2	1.1	7.0.x	7.0.57	6 and later (WebSocket 1.1 requires 7 or later)
2.5	2.1	2.1	N/A	6.0.x	6.0.41	5 and later
2.4	2.0	N/A	N/A	5.5.x (archived)	5.5.36 (archived)	1.4 and later
2.3	1.2	N/A	N/A	4.1.x (archived)	4.1.40 (archived)	1.3 and later
2.2	1.1	N/A	N/A	3.3.x (archived)	3.3.2 (archived)	1.1 and later

*. 구 버전 jdk 다운로드

1. http://download.oracle.com

2. 메뉴 > Downloads 왼쪽 > Java for Developers

3. 화면 밑의 Previous Releases - Java Archive - Download 클릭

jre - 브라우저에서 applet등의 실행을 위해 사용

jdk - jvm에 올려 개발 할때 사용