springboot做郵件發送功能時報錯No qualifying bean of type 'org.springframework.mail.javamail.JavaMailSender' available:的問題解決方案

1.檢查application。yml中的配置是否正確

spring.mail.host=smtp.xxx.com
spring.mail.username=[e-mail]
spring.mail.password=xxxxx
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true

2.新建一個類，添加如下配置
public class MailConfig {
@Bean
public JavaMailSenderImpl mailSender() {
JavaMailSenderImpl javaMailSender = new JavaMailSenderImpl();

javaMailSender.setProtocol("SMTP");
javaMailSender.setHost("smtp.qq.com");
javaMailSender.setPort(465);

return javaMailSender;
}
}