javax/servlet/ServletContext : Unsupported major.minor version 51.0

解决:将版本从 3.1.0 改为 3.0.1 

<!-- 添加servlet API 依赖-->
<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>javax.servlet-api</artifactId>
  <version>3.0.1</version>
</dependency>


进行 SpringJunit  测试时,报错:

java.lang.UnsupportedClassVersionError: javax/servlet/ServletContext : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method) 
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) 
at java.lang.ClassLoader.defineClass(ClassLoader.java:615) 
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) 
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) 
at java.net.URLClassLoader.access$000(URLClassLoader.java:58) 
at java.net.URLClassLoader$1.run(URLClassLoader.java:197) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.net.URLClassLoader.findClass(URLClassLoader.java:190) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:306) 
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:247) 
at java.lang.Class.getDeclaredConstructors0(Native Method) 
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2398) 
at java.lang.Class.getConstructor0(Class.java:2708) 
at java.lang.Class.getDeclaredConstructor(Class.java:1987) 
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:104) 
at org.springframework.test.context.support.AbstractTestContextBootstrapper.instantiateListeners(AbstractTestContextBootstrapper.java:191)
at org.springframework.test.context.support.AbstractTestContextBootstrapper.getTestExecutionListeners(AbstractTestContextBootstrapper.java:173)
at org.springframework.test.context.TestContextManager.(TestContextManager.java:104) 
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTestContextManager(SpringJUnit4ClassRunner.java:123)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.(SpringJUnit4ClassRunner.java:114) 
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) 
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) 
at java.lang.reflect.Constructor.newInstance(Constructor.java:513) 
at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:31) 
at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:24) 
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57) 
at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:29) 
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57) 
at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:24) 
at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:33) 
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:41) 
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:211) 
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:67) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134) 



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