tomcat5.0.28

servlet 位置:
\webapps\myservlet\WEB-INF\classes\HelloWorld

web.xml 配置：
........
<servlet>
<servlet-name>HelloWorld</servlet-name>
<servlet-class>HelloWorld</servlet>
</servlet>
<servlet-mapping>
<servlet-name>HelloWorld</servlet-name>
<url-pattern>/servlet/Helloworld</url-pattern>
</servlet-mapping>
........

显示错误 ：

type Exception report

message 

description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

javax.servlet.ServletException: Error allocating a servlet instance
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
    org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
    org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
    org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
    java.lang.Thread.run(Thread.java:534)


root cause 

java.lang.UnsupportedClassVersionError: admin/HelloWorld (Unsupported major.minor version 49.0)
    java.lang.ClassLoader.defineClass0(Native Method)
    java.lang.ClassLoader.defineClass(ClassLoader.java:539)
    java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
    org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1634)
    org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:860)
    org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1307)
    org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1189)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
    org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
    org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
    org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
    java.lang.Thread.run(Thread.java:534)


note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.

 新手上路 请高手详细指点一下 谢谢