记一次导入项目后IDEA出现ClassNotFoundException:javax.servlet.Filter

完整报错信息如下

org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [com.yzj.taf.TafParentApplication]; nested exception is org.springframework.core.NestedIOException: Failed to load class [javax.servlet.Filter]; nested exception is java.lang.ClassNotFoundException: javax.servlet.Filter
	at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:181)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:315)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:232)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:275)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:95)
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:705)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:531)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at com.yzj.taf.TafParentApplication.main(TafParentApplication.java:34)
Caused by: org.springframework.core.NestedIOException: Failed to load class [javax.servlet.Filter]; nested exception is java.lang.ClassNotFoundException: javax.servlet.Filter
	at org.springframework.context.annotation.ConfigurationClassParser.asSourceClass(ConfigurationClassParser.java:682)
	at org.springframework.context.annotation.ConfigurationClassParser$SourceClass.getInterfaces(ConfigurationClassParser.java:1011)
	at org.springframework.context.annotation.ConfigurationClassParser.processInterfaces(ConfigurationClassParser.java:375)
	at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:323)
	at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:242)
	at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:191)
	at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:295)
	at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:242)
	at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:199)
	at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:167)
	... 12 common frames omitted
Caused by: java.lang.ClassNotFoundException: javax.servlet.Filter
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:348)
	at org.springframework.util.ClassUtils.forName(ClassUtils.java:275)
	at org.springframework.context.annotation.ConfigurationClassParser.asSourceClass(ConfigurationClassParser.java:679)
	... 21 common frames omitted

Process finished with exit code 1

本来在eclipse都能正常跑起来的，但是导进IDEA就出现问题了。
然后开始面向百度，

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多数解决是需要修改pom文件的

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-tomcat</artifactId>
    <scope>provided</scope>
</dependency>

将scope注释掉，或者修改为compile。注释掉默认就是compile。
但是尝试修改后也没有能正常启动，转念一想，凭什么换一个开发工具就修改代码？？？这肯定不正常。

---

想来想去还是觉得不同开发工具配置不同的问题最大。

接着又是一顿百度。发现IDEA的配置这4个带tomcat的全是provided。
(shift+ctrl+alt+s快捷键打开)

全部修改为compile

再启动，成功！！