IDEA中Spring Boot項目報錯：There was an unexpected error (type=Not Found, status=404)
【版權所有，文章允許轉載，但須以鏈接方式註明源地址，否則追究法律責任】 報錯信息 報這個錯的原因是SpringBoot主配置類(@SpringBootApplication註解標註的類)的所在包和你的Controller類不在同一個包下，如圖： 原因是主配置類所在包及下面所有子包裏面的所有組件都會自動幫你掃描到Spring容器中，所以你不放在同一包下他就不會去掃描，那自然就報404了！
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