Springboot應用靜態資源不能訪問，報「This application has no explicit mapping for /error」

問題: css Springboot應用靜態資源不能訪問，例如html, css, js, jpg等文件不能訪問。頁面顯示：html Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as a fallback.app Wed Dec 14 16:35:

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