4.0.0 org.springframework.boot spring-boot-starter-parent 3.2.0 org.example ws-begin 1.0-SNAPSHOT jar 21 21 21 UTF-8 org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-websocket org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin