Compiler exception caused by:java.lang.UnsupportedClassVersionError:

Caused By:java.lang.unsupportedclassversionerror:com/sumingk/platform/service/impl/servicesyspersonimpl: Unsupported Major.minor version 51.0 (Unable to loadclassCom.sumingk.platform.service.impl.ServiceSysPersonImpl) at Org.apache.catalina.loader.WebappClassLoader.findClassInternal (Webappclassloader.java:2892) at Org.apache.catalina.loader.WebappClassLoader.findClass (Webappclassloader.java:1172) at Org.apache.catalina.loader.WebappClassLoader.loadClass (Webappclassloader.java:1680) at Org.apache.catalina.loader.WebappClassLoader.loadClass (Webappclassloader.java:1558) at Org.springframework.util.ClassUtils.forName (Classutils.java:249) at Org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass ( Abstractbeandefinition.java:395) at Org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass ( Abstractbeanfactory.java:1349) at Org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass (Abstractbeanfactory.java :1320)    ... More

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Solution:

The cause of this error is that the JDK version supporting Tomcat runs is inconsistent with the JDK version that supports application running.
Change their JDK to the same steps as follows:
1.Window--Preferences-->java--and compiler in the compiler compliance level, select the JDK version in the drop-down menu.
2.Window--Preferences-->myeclipse---Servers-->tomcat-a drop-down menu under Tomcat JDK name in Tomcat n.x-->JDK Select the JDK version installed on your PC (required to match the JDK version in step 1).

Compiler exception caused by:java.lang.UnsupportedClassVersionError: