tomcat报错，idea却可以正常运行 java.lang.NoClassDefFoundError

Caused by: java.lang.IllegalStateException: Failed to introspect Class [com.hjkj.udp.cyc.config.RedisConfig] from ClassLoader [ParallelWebappClassLoader
  context: udp_war_exploded
  delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@5e91993f
]
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:481)
    at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:358)
    at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:414)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.lambda$getTypeForFactoryMethod$2(AbstractAutowireCapableBeanFactory.java:743)
    at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:742)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:681)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:649)
    at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1605)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:520)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:491)
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.collectBeanNamesForType(OnBeanCondition.java:230)
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:223)
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:213)
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchingBeans(OnBeanCondition.java:167)
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchOutcome(OnBeanCondition.java:142)
    at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47)
    ... 64 more
Caused by: java.lang.NoClassDefFoundError: org/springframework/data/redis/serializer/RedisSerializer
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.getDeclaredMethods(Class.java:1975)
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463)
    ... 80 more
Caused by: java.lang.ClassNotFoundException: org.springframework.data.redis.serializer.RedisSerializer
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1309)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1137)
    ... 84 more

上面是报错信息

 

在整合springBoot+redis 的时候，idea整合之后就可以启动了，但是使用tomcat启动的时候就报错，找了半天，最后是因为maven没有引入到WEB-INF下面的lib

 

点击 鼠标右键 会出现这个东西，然后点击第一个就行，把所有包都添加到lib下就可以了