java出現Error creating bean with name xxController Unsatisfied dependency expressed through fieldxx

java編寫項目時出現Error creating bean with name 'xxController': Unsatisfied dependency expressed through field'xxx' 今天在寫項目時，遇到了一個500的錯誤，廢話不多說，直接上圖 錯誤信息如下： Error creating bean with name ‘mainController’: Unsa

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