Spring MVC - bind form elements to a List<Long>

Question

Is it possible to bind a form element to a List<Long>?

ie. <form:input path="formValues[0]" /> binding to an element in List<Long> formValues; in the form backing object?

When I try this, it fails because Long does not have a default constructor new Long().

I've worked around it by creating a dummy holder class

class DummyLong {
    private Long value;
    ...
}

making the list in the formbacking object a List<DummyLong> and changing the form tag to <form:input path="formValues[0].value" /> but this seems unnecessarily hideous and I'm sure there must be a better way. Haven't been able to find it though.

Did you try List<Long> formValues with <form:input path="formValues" />? — Slava Semushin
– Slava Semushin, Commented Aug 1, 2011 at 10:11

Slava Semushin · Accepted Answer · 2011-08-01 17:35:02Z

2

Use List<Long> formValues with <form:input path="formValues" />

answered Aug 1, 2011 at 17:35

Slava Semushin

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