@Data public class MailSender { private String Subject; private String Text; private String SetTo; private String SetFrom; private Map<String, String> Attachments; }
原因: 实体类属性必须遵循驼峰命名
@Data public class MailSender { private String subject; private String text; private String setTo; private String setFrom; private Map<String, String> attachments; }