运行myeclipse项目中遇到问题

Question

在运行myeclipse项目中遇到了这个问题，确实不会改，希望能帮忙看看
2021-9-26 17:34:15 org.apache.catalina.core.ApplicationContext log
信息: Marking servlet [LoginServlet] as unavailable
2021-9-26 17:34:15 org.apache.catalina.core.StandardWrapperValve invoke
严重: Allocate exception for servlet [LoginServlet]
java.lang.UnsupportedClassVersionError: com/qhua/servlet/LoginServlet : Unsupported major.minor version 51.0 (无法载入的.类 [com.qhua.servlet.LoginServlet])
at org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:3250)
at org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:1416)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1921)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1795)
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:536)
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:518)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:148)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1137)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:847)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:492)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:165)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:1025)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1201)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:654)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:317)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:619)

Answer 1

jdk版本过低的问题，升级一下jdk版本