jdon-j2ee教程疑问

04-06-17 nakata2004
按教程部署EAR到JBOSS后，运行testEJB.jsp文件，抛出如下EXCEPTION

org.apache.jasper.JasperException: java.lang.Exception: javax.ejb.TransactionRolledbackLocalException: createBeanClassInstanceCommand == null; CausedByException is:

createBeanClassInstanceCommand == null

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:254)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)

at org.apache.jasper.servlet.JspServlet.service

请告知可能的错误，谢谢！

nakata2004
2004-06-17 11:17
org.apache.jasper.JasperException: java.lang.Exception: javax.ejb.CreateException: Could not create entity:java.sql.SQLException: General error message from server: "Column 'grade' cannot be null"

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:254)

以上EXCEPTION，可能是什么文件出错呢？

wwlhp@jdon
2004-06-17 14:16
实体bean的create方法传入的参数有问题，对应的表的grade字段不能为NULL。

nakata2004
2004-06-17 14:25
谢谢，调出来了

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