검정95 검정95

기본설정 1. pom.xml 에 dependency 추가 2. EchoHandler class 생성 package com.sp.ex; import java.util.ArrayList; import java.util.List; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.socket.CloseStatus; import org.springframework.web.socket.TextMessage; import org.springframework.web.socket.WebSocketSes..