有以下几种可能
环境异常重启，项目java进程未关闭，原项目的端口依旧在占用。
8080端口被占用
呼出任务管理器关闭java.exe的进程再重启即可
IDEA启动项目报错：org.apache.catalina.LifecycleException: Failed to start component的解决办法
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