Displaying list in a list JSP Page

Question

I am trying to display a list and every object of that list has another list which I have to display, the values are coming but are not being displayed, below is the code I have tried if someone could identify what I am doing wrong, it will be very helpful. I am using Spring MVC but I don't think it has anything to do with this error, any help will be appreciated.

    @Entity
@Table(name="FILE_TRACKING_MANAGEMENT")
@NamedQuery(name="FileTrackingManagement.findAll", query="SELECT f FROM FileTrackingManagement f")
{

   @OneToMany(mappedBy="fileTrackingManagement")
    private List<FileNoting> fileNotings;

    //bi-directional many-to-one association to FileTrackingFile
    @OneToMany(mappedBy="fileTrackingManagement")
    private List<FileTrackingFile>  fileTrackingFiles;

    }

My Controller Class:

@RequestMapping("viewMarkedFiles/list")
    public ModelAndView viewMarkedFiles(Model model)
    {
        List<FileTrackingManagement> markedFileList=  fileService.getList();
        //model.addAttribute("markedFileList", markedFileList);

        return new ModelAndView("viewMarkedFiles", "markedFileList", markedFileList);
    }

My JSP Page:

<table border="1" bgcolor="black" width="600px">
    <c:forEach items="${markedFileList}" var="markedFileVal">
    <%--                <c:set var="fileNotings" value="${jobs[i.index].jobId}"/> --%>
                        <tr
                            style="background-color: white; color: black; text-align: center;"
                            height="30px">

                            <td><c:out value="${markedFileVal.diarynumber}" />
                            <td><c:out value="${markedFileVal.subject}" />
                            <td>

                            </td>
                            <td>

                            </td>
                            <td>
                            <c:forEach items="${markedFileList.fileNotings}" var="filenotings">
                            <c:out value="${filenotings.notingData}" /></c:forEach>
                            </td>
</c:forEach>
</table>

It throws this exception:

45: <%--                        <c:out value="${fileVal.description}" /> --%>
46:                         </td>
47:                         <td>
48:                         <c:forEach items="${markedFileList.fileNotings}" var="filenotings">
49:                         <c:out value="${filenotings.notingData}" /></c:forEach>
50:                         
51:                         


Stacktrace:] with root cause
java.lang.NumberFormatException: For input string: "fileNotings"
    at java.lang.NumberFormatException.forInputString(Unknown Source)
    at java.lang.Integer.parseInt(Unknown Source)



at java.lang.Integer.parseInt(Unknown Source)

Thanks in advance

Answer 1

@OneToMany(fetch = FetchType.EAGER, mappedBy="fileTrackingManagement") private List fileNotings;

The value of fetchType is Lazy by default, when I changed its value, it worked

Answer 2

<c:forEach items="${markedFileList}" var="markedFileVal">

So, you're iterating oover the list markedFileList. Inside the body of the tag, the current element is markedFileVal.

Then you do

<c:forEach items="${markedFileList.fileNotings}" var="filenotings">

So you're ietarting over markedFileList.fileNotings. But markedFileList is a list. It's not the current element. What you want is

<c:forEach items="${markedFileVal.fileNotings}" var="filenoting">

Also note that I removed the final s from filenotings. This variable points to a single filenoting. Not to several ones.