请教大家 ，在myeclipse 运行正常，可是部署到 tomcat 报错 ，是否需要配置什么内容？  

 [ERROR]/toLogin

java.lang.NullPointerException

        at com.eova.interceptor.AuthInterceptor.intercept(AuthInterceptor.java:4

8)

        at com.jfinal.aop.Invocation.invoke(Invocation.java:67)

        at com.eova.interceptor.LoginInterceptor.intercept(LoginInterceptor.java

:52)

        at com.jfinal.aop.Invocation.invoke(Invocation.java:67)

        at com.jfinal.core.ActionHandler.handle(ActionHandler.java:74)

        at com.jfinal.plugin.druid.DruidStatViewHandler.handle(DruidStatViewHand

ler.java:75)

        at com.jfinal.core.JFinalFilter.doFilter(JFinalFilter.java:72)

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl

icationFilterChain.java:241)

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF

ilterChain.java:208)