Question

maven项目pom.xml提示错误,这是什么问题?

Project build error: Unresolveable build extension: Plugin org.apache.felix:maven-bundle-plugin:3.0.0 or one of its dependencies could not be resolved: Failed to collect dependencies at org.apache.felix:maven-bundle-plugin:jar:3.0.0 -> org.apache.maven:maven-core:jar:2.2.0 -> org.codehaus.plexus:plexus-interactivity-api:jar:1.0-alpha-4
Missing artifact org.apache.mina:mina-core:bundle:2.0.10

Answer 1

一、pom.xml报错
类似：Missing artifact org.springframework:spring-jdbc:jar:3.2.4.RELEASE 这样的错误，提示某个jar包没有了。

这个问题之前碰见好几次了，每次解决了下一次又忘了，特意记下来。

解决办法是：右键项目，选择maven，选择update project，除默认选择外，再勾选Force Update of Snapshots/Releases，点击ok，等待maven依赖更新。

二、SpringBoot启动报错-Due to missing ServletWebServerFactory
更新2019.6.24

2019-06-24 14:09:15.039 INFO 17356 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.amqp.rabbit.annotation.RabbitBootstrapConfiguration' of type [org.springframework.amqp.rabbit.annotation.RabbitBootstrapConfiguration$$EnhancerBySpringCGLIB$$6d407ba3] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2019-06-24 14:09:15.592 WARN 17356 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.

查看ServletWebServerFactory类，发现其引用了org.apache.catalina包下的文件，

然后查看已经被引入的jar包，发现没有这个包。

解决办法，添加如下依赖即可：

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

注：网上一些文章里说的tomcat-embed包下为空的问题，跟我这个问题有所不同。我这是没有引入spring-boot-starter-web依赖，导致没有正确引入tomcat相关的包，而不是依赖冲突或者其他问题。

三、未完待续..

以后如果遇到有关maven报错的问题还会记到这里来。

追问

你这出处是哪的呢?