Spring MVC: @RequestMapping: How to catch Map parameter?

Question

I have the controller method for processing form submitting:

@RequestMapping(method = {RequestMethod.POST})
    public String submitForm(...){...}

But, I have got a new test case:

If Form has parameter ProductData call controller method submitFormWithProductData. and I am facing difficulties with this, because ProductData is a Map. On Site ProductData field in form tag looks like:

<input type="text" name="productData['param1']">
<input type="text" name="productData['param2']">

And I don't know, how to create right @RequestMapping annotation for submitFormWithProductData method.

I have tried:

@RequestMapping(method = {RequestMethod.POST}, params="productData")

and

@RequestMapping(method = {RequestMethod.POST}, params="productData[]")

but I didn't get success.

could you please explain why you want to do this (handling the request differently) ? maybe there is another approach that meets your requirements — marco.eig
– marco.eig, Commented Apr 1, 2015 at 10:09
Sure, I can explain: at the moment, I have out of box controller method submitForm; then, I added new feature (productData Map) in existing html form and I need to process this data to. I am not able to modify oob code, so I just created new method submitFormWithProductData, but how to call it... — user471011
– user471011, Commented Apr 1, 2015 at 10:15

marco.eig · Accepted Answer · 2015-04-01 10:31:33Z

2

productData has to be a property of a model object.

public class FormModel {
    private Map<String,String> productData = ...;
    ...
}

according to this you have to create a handler method like that:

@RequestMapping(....)
public String submitFormWithProductData(FormModel formModel) {
  ....
}

Spring will automatically bind the productData parameters to the according property in the FormModel object.

But I don't know why you want to handle it differently. You could add a hidden input field productDataSubmitted and add the following handler:

@RequestMapping(method = {RequestMethod.POST}, params="productDataSubmitted")

answered Apr 1, 2015 at 10:31

marco.eig

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1 Comment

user471011 Over a year ago

You have: FormModel class and submitForm(FormModel) handler - they are out of box, it means, that you can not modify them, ok? You can add FormWithProductDataModel extends FormModel, agree? and add in FormWithProductDataModel property Map<String, String> productData, agree? then you need to handle this form on server side, you can not to modify default handler, so, you will add new method submitFormWithProductData(FormWithProductDataModel form), yes? What @RequestMapping parameters you will use for new handler?

Braj · Accepted Answer · 2015-04-01 10:44:36Z

1

Use @RequestBody Map<String,String> productData as argument int the controller method.

Here is a Blog and Read more...

For example:

@RequestMapping(value = "/add", method = RequestMethod.POST, consumes="application/json")
public void submitForm(@RequestBody Map<String,String> productData, Model model) {
    // implementation omitted
}

edited Apr 1, 2015 at 10:44

answered Apr 1, 2015 at 10:37

Braj

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