针对JBOSS无法转换类型的错误

更改配置：

D:\DevelopTool\jboss-4.2.2.GA\server\default\deploy\jboss-web.deployer\META-INF下的

jboss-service.xml下找到

<attribute name="UseJBossWebLoader">false</attribute>
      <!-- The list of package prefixes that should not be loaded without
         delegating to the parent class loader before trying the web app
         class loader. The packages listed here are those tha are used by
         the web container implementation and cannot be overriden. The format
         is a comma separated list of the package names. There cannot be any
         whitespace between the package prefixes.
         This setting only applies when UseJBossWebLoader=false.
      -->

将其改为true。就是对于web应用的类库也用jboss来加载，而不是有tomcat来加载。