was7下发布项目报错

今天用was7发布项目的时候，出现如下报错：

Caused by: java.lang.NullPointerException
at org.springframework.core.GenericTypeResolver.getTypeVariableMap(GenericTypeResolver.java:144)
at org.springframework.core.GenericTypeResolver.resolveReturnType(GenericTypeResolver.java:93)
at org.springframework.beans.GenericTypeAwarePropertyDescriptor.getPropertyType(GenericTypeAwarePropertyDescriptor.java:58)
at java.beans.PropertyDescriptor.setWriteMethod(Unknown Source)
at java.beans.PropertyDescriptor.(Unknown Source)
at org.springframework.beans.GenericTypeAwarePropertyDescriptor.(GenericTypeAwarePropertyDescriptor.java:47)
at org.springframework.beans.CachedIntrospectionResults.(CachedIntrospectionResults.java:250)
at org.springframework.beans.CachedIntrospectionResults.forClass(CachedIntrospectionResults.java:144)
at org.springframework.beans.BeanWrapperImpl.getCachedIntrospectionResults(BeanWrapperImpl.java:252)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:380)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1287)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1248)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1008)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:470)


通过上网查阅才找到问题的根源。
之前用的spring版本为2.5.4 将spring的版本升级到2.5.6以后问题解决。
PS:在was7上spring2.5.6之前的版本会和JDK6存在冲突，导致读取配置文件的时候出现错误。