WEBLOGIC 找不到方法

Question

WEBLOGIC启动没有任何的异常，但是在系统的前台进行导出EXCEL时，出现了以下的异常信息。Exception in thread "Thread-26" java.lang.NoSuchMethodError: org.apache.poi.hssf.
usermodel.HSSFSheet.setDefaultColumnStyle(SLorg/apache/poi/hssf/usermodel/HSSFCel
lStyle;)V
        at nariis.pi3000.businessmodel.services.handler.BusinessLogic.commonExpor
tBds2ExcelAsFile(BusinessLogic.java:5015)
        at nariis.pi3000.businessmodel.services.handler.BusinessLogic.export2Exce
lAsFile(BusinessLogic.java:4184)
        at nariis.pi3000.businessmodel.services.handler.BusinessLogic.access$000(
BusinessLogic.java:98)
        at nariis.pi3000.businessmodel.services.handler.BusinessLogic$2.run(Busin
essLogic.java:4145)但是查看后台代码，看到excel导出的这个jar已经被weblogic加载进来了，为何找不到这个方法，求救weblogicexcelexception