Spring Integration 4.2.0 发布，更新内容如下： ** Bug
* [INT-3804] - WatchServiceDirectoryScanner does not handle OVERFLOW event
* [INT-3805] - The AbstractMethodAnnotationPostProcessor uses
`beanFactory.initializeBean` twice for the auto-created channels
* [INT-3807] - Rabbit Template hardcoded in Amqp Gateway
* [INT-3810] - AMQP Inbound Gateway NPE with No ReplyTo
* [INT-3821] - Message details are blank ** 改进
* [INT-3671] - Document Generated Bean Names for Annotated @Bean EIP Endpoints
* [INT-3732] - Document Advanced @Aggregator Configuration
* [INT-3769] - Be more friendly with current Spring Integration
* [INT-3813] - Consider some performance improvement for HTTP components
* [INT-3818] - PassThroughMultipartConverter ** Task
* [INT-3733] - Final Documentation polishing for GA release
* [INT-3808] - DefaultAmqpHeaderMapper should not copy over x-received-from header
* [INT-3812] - The current documentation of SI uses deprecated xml attribute
* [INT-3814] - Update to SF 4.2.1 更多内容请查看：发行日志。 下载地址：v4.2.0.RELEASE。 Spring
Integration能在基于Spring的应用中进行简单的消息通信，并通过简单的适配器与外部系统集成。这些适配器提供了一个更高级别的抽象，超越
了Spring对远程调用、消息和调度的支持。其主要目标是在保持关注点分离的同时，为构建企业集成解决方案提供一个简单的模型，该模型对产出可维护、可
测试的代码来说是必不可少的。 | 
