javax.servlet.ServletException: Servlet.init() for servlet springmvc threw exception

e'cipse中，项目没报错，正常启动，访问控制器时报错

javax.servlet.ServletException: Servlet.init() for servlet springmvc threw exception  
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)  
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)  
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)  
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)  
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)  
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)  
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)  
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)  
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)  
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)  
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)  
    java.lang.Thread.run(Thread.java:745)  

Servlet.init()初始化错误，错误一般发生在控制器中，当出现重名的servlet时候也会报类似的错误，
上述错误原因：
　　controller中出现了，不存在的控制器引用
　　例如：return “redirect:/admin/query.action”,返回重定向到另外一个控制器，但是控制器未定义，就会出现上述错误！


--------------个人总结，积累

1. javax.servlet.ServletException: Servlet.init() for servlet springmvc threw exception  
2.     org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)  
3.     org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)  
4.     org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)  
5.     org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)  
6.     org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)  
7.     org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)  
8.     org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)  
9.     org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)  
10.     java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)  
11.     java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)  
12.     org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)  
13.     java.lang.Thread.run(Thread.java:745)