org.springframework.mail.javamail.JavaMailSender' that could not be found

手動發送郵件SpringBoot項目啓動失敗，原因還需要配置如下

sprinng:
mail:
default-encoding: UTF-8
host: mail.hd.bitauto.com
password: qwer.123
properties:
mail:
smtp:
auth: true
starttls:
enable: false
required: false