Question

JSF valueChangeListener问题，请教高手

前台代码：
<t:selectOneMenu value="#{spInfonewBacking.spInfonewBean_new.operation_type_grade}" onchange="submit()" valueChangeListener="#{spInfonewBacking.changeListener}"> <f:selectItems value="#{spInfonewBacking.operGradeList}"/>
</t:selectOneMenu>
可是我的值一改变就报错：
2009-3-30 10:56:01 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet Faces Servlet threw exception
java.util.NoSuchElementException
严重: Servlet.service() for servlet Faces Servlet threw exception
java.util.NoSuchElementException
at javax.faces.component.SelectItemsIterator.next(SelectItemsIterator.java:117)
at javax.faces.component.SelectItemsIterator.next(SelectItemsIterator.java:144)
at javax.faces.component.SelectItemsIterator.next(SelectItemsIterator.java:49)
at javax.faces.component.UISelectOne.matchValue(UISelectOne.java:164)
at javax.faces.component.UISelectOne.validateValue(UISelectOne.java:137)
at javax.faces.component.UIInput.validate(UIInput.java:867)
at javax.faces.component.UIInput.executeValidate(UIInput.java:1065)
at javax.faces.component.UIInput.processValidators(UIInput.java:666)

Answer 1

NoSuchElementException
报的是没有这个元素的异常
你跟踪一下代码,看下在执行change的时候会到哪里,得到哪些数据