使用Feign ErrorDecoder检索原始消息
1. 概述
RESTful服务可能因多种原因失败。在本教程中，我们将探讨如何在集成REST服务抛出错误时从Feign客户端检索原始消息。
2. Feign客户端
Feign是一个可插拔且声明式的Web服务客户端，它使编写Web服务客户端变得更容易。除了Feign注解外，它还支持JAX-RS，并且支持编码器和解码器以提供更多定制。
3. 从_ErrorDecoder_检索消息
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