spring 数组configuration

# 配置邮件mail:
  configs:
    # 账号
    - username: [e-mail]      
      password: 123456
      host: smtp.qq.com      
      port: 25
      protocol: smtp      
      default-encoding: UTF-8
    # 账号A
    - username: [e-mail]      
      password: 123456
      host: smtp.qq.com      
      port: 25
      protocol: smtp      
      default-encoding: UTF-8

@Data
@Component
@ConfigurationProperties(prefix = "mail")
public class MailConfig {

    private List<MailProperties> configs;

    @Data
    public static class MailProperties {

        /**
         * 密码
         */
        private String username;

        /**
         * 密码
         */
        private String password;

        /**
         * host
         */
        private String host;

        /**
         * 端口
         */
        private Integer port;

        /**
         * 协议
         */
        private String protocol;

        /**
         * 默认编码
         */
        private String defaultEncoding;

    }}

来源：https://www.jianshu.com/p/9c44f676fa31