Question

打开jsp页面报错

<jsp:include page="/customer/EditCustCorporationInclude.jsp" flush="true">
<jsp:param name="custfromdetail" value=""/>
<jsp:param name="corporation" value=""/>
</jsp:include>

使用jsp:include来调用页面时，传了两个空字符串的参数，打开jsp页面报空指针错误，为什么？
java.util.NoSuchElementException
at java.util.AbstractList$Itr.next(AbstractList.java:350)
at org.apache.jasper.compiler.Validator$ValidateVisitor.getJspAttribute(Validator.java:1385)
at org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:562)
at org.apache.jasper.compiler.Node$ParamAction.accept(Node.java:989)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2377)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2429)
at org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:583)
at org.apache.jasper.compiler.Node$IncludeAction.accept(Node.java:1063)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2377)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2429)
at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2435)
at org.apache.jasper.compiler.Node$Root.accept(Node.java:474)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2377)
at org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1841)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:217)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:373)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)

Answer 1

org.apache.jasper.JasperException: /goods_do.jsp(8,0) The value for the useBean class attribute com.chapter2.Goods is invalid.

错误已经很明显了,,这个jsp找不到javabean: com.chapter2.Goods

Answer 2

因为jsp动态包含的页面中有空指针异常，检查包含页面的对象是否已经初始化了。
java.util.NoSuchElementException解决办法
猜测是某个interator出现了越界：
while (iter.hasNext()) {
JIRAFeature jirafeaturetemp = iter.next();
ArrayList<SprintUserStory> undoneUserStoriesList = SprintUtil.getUndoneUserStoriesList(jirafeaturetemp.getID(),jirafeaturetemp.getPkey());
if(undoneUserStoriesList.size() >0){
willdonefeautre--;
}

Answer 3

迭代器错误
应该是你多用了一次 next() 方法造成的