yml文件配置：

weixin: 
  platformkey:
    shanxi: s6bba6sdfggre54b87de3b8sdfa5beca
    hunan: 1sdfggr44wweffds87de3b81a3a5beca


class代码不能通过@Value注解获取，需要使用 @ConfigurationProperties注解获取：

@Component
@Data
@EqualsAndHashCode(callSuper = false)
@ConfigurationProperties(prefix = "weixin")
public class WXConfig implements {
  private Map<String, String> platformkey;
}