JAVA | 初始化配置

以 RabbitMQ 为例，yml 文件配置如下：

application:
  rabbit:
    default-message:
      exchange:
        name: defaultExchange
      queue:
        name: defaultQueue
      binding:
        routing-key: #

代码中通过构造器初始化后，可以不配置 yml 。配置了 yml 会覆盖构造器中配置。

@Getter
@Configuration
@ConfigurationProperties(prefix = "application.rabbit", ignoreUnknownFields = false)
public class ApplicationRabbitMQProperties {
    /**
     * 死信交换机默认配置
     */
    private final DefaultMessage defaultMessage = new DefaultMessage();
    @Getter
    public static class DefaultMessage {
        private final CustomerExchange exchange = new CustomerExchange();
        private final CustomerQueue queue = new CustomerQueue();
        private final CustomerBinding binding = new CustomerBinding();
    }
    @Data
    public static class CustomerExchange {
        /**
         * 交换机名称
         */
        private String name = "defaultExchange";
        /**
         * 交换机是否持久化
         */
        private Boolean durable = true;
        /**
         * 是否自动删除空闲的交换机
         */
        private Boolean autoDelete = false;
        /**
         * 对交换机属性进行配置
         */
        private Map<String, Object> arguments = new HashMap<>(10);
    }
    @Data
    public static class CustomerQueue {
        /**
         * 队列名称
         */
        private String name = "defaultQueue";
        /**
         * 队列是否持久化
         */
        private Boolean durable = true;
        /**
         * 是否连接独占
         */
        private Boolean exclusive = false;
        /**
         * 是否自动删除空闲的交换机
         */
        private Boolean autoDelete = false;
        /**
         * 对消息属性进行配置
         */
        private Map<String, Object> arguments = new HashMap<>(10);
    }
    @Data
    public static class CustomerBinding {
        /**
         * 默认路由(#:表示拦截任意字符的路由,*:表示拦截任意的单个字符,其他拦截比如：user.ABC 等自定义路由)
         */
        private String routingKey = "#";
    }
}