启动SpringBoot报错：The bean ‘beanNameViewResolver‘ 无法注册

问题描述

在引入 easypoi 的相关依赖之后，无法启动 SpringBootApplication 服务。

easypoi 依赖：

<dependency>
    <groupId>cn.afterturngroupId>
    <artifactId>easypoi-spring-boot-starterartifactId>
    <version>${easypoi.version}version>
dependency>

启动SpringBootApplication报错，报错信息如下：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-03-24 22:58:25.213 ERROR 8208 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

The bean 'beanNameViewResolver', defined in class path resource [cn/afterturn/easypoi/configuration/EasyPoiAutoConfiguration.class], could not be registered. A bean with that name has already been defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/error/ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration.class] and overriding is disabled.

Action:

Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true


Process finished with exit code 1

报错原因

这是因为在 easypoi 的依赖中，有一个注册名称为 beanNameViewResolver 的 Bean 的名称与 SpringBoot 中的一个 Bean 的名称相同，发生了 Bean 名称注册冲突。

easypoi 的 beanNameViewResolver：

SpringBoot 的 beanNameViewResolver：

解决方法

配置允许 Bean 的定义覆盖属性为 true

spring:
  main:
    allow-bean-definition-overriding: true