有以下幾種可能
環境異常重啟，項目java進程未關閉，原項目的端口依舊在占用。
8080端口被占用
呼出任務管理器關閉java.exe的進程再重啟即可
IDEA啟動項目報錯：org.apache.catalina.LifecycleException: Failed to start component的解決辦法
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啟動項目報錯：org.apache.catalina.LifecycleException: Failed to start component
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