java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: java.lang.UnsupportedClassVersionError: com/servlet/RegServlet : Unsupported major.minor version 51.0 这个异常是在想一个servlet处理多个请求时,用了switch语句以及稍后的eclipse的代码纠错提示而导致的。原因是我用的java版本是1.6,而servlet中使用switch是在1.7之后才被支持的,无论重启电脑还是删tomcat都不管用,其实问题很简单,右键项目,properties->java compiler这里把版本改回去就可以了,这个是eclipse的问题
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