websphere java.lang.ExceptionInInitializerError

[qq_24644833]

Caused by:
java.lang.ExceptionInInitializerError
at java.lang.J9VMInternals.initialize(J9VMInternals.java:250)
at com.crfchina.wms.makeCard.service.impl.MakeCardBizServiceImpl.getCardDataTable(MakeCardBizServiceImpl.java:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:611)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:287)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:181)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:148)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:100)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:176)
at $Proxy135.getCardDataTable(Unknown Source)
at com.crfchina.wms.makeCard.web.action.MakeCardAction.getCardDataTable(MakeCardAction.java:90)
... 41 more
Caused by:
java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Integer.java:428)
at java.lang.Integer.parseInt(Integer.java:510)
at com.crfchina.wms.makeCard.common.MakeCardConstants.<clinit>(MakeCardConstants.java:123)
at java.lang.J9VMInternals.initializeImpl(Native Method)
at java.lang.J9VMInternals.initialize(J9VMInternals.java:228)
... 54 more
报以上的错，个人认为是static变量初始化失败，各位大神怎么看，怎么解决了？