참고자료
1. http://milestonenext.blogspot.kr/2013/07/html5-websocket-sample-with-java.html
2. http://devday.tistory.com/3142
3. http://java.dzone.com/articles/creating-websocket-chat
4. https://webtide.com/websocket-example-server-client-and-loadtest/
WebSocket 소개
1. http://yoontaesub.egloos.com/2045579
jWebSocket (JAVA)
1. http://blog.jwebsocket.org/2010/09/10/jwebsocket-maven-dependency/
Spring4 WebSocket 구현
참고자료#1(개인 블로그) : http://netframework.tistory.com/424
참고자료#2(Spring IO Document) : http://docs.spring.io/spring/docs/current/spring-framework-reference/html/websocket.html
참고자료#3(개인 블로그-Maven) : http://oofbird.net/9