How to give default value as integer in @RequestParam()

Question

I'm new to spring boot and learning @RequestParam()

I know that we can give defaultValue in String but when I am trying to give default value as Integer it's showing me an error.

@RequestMapping("/returnVeriable")
public int getVeriable(@RequestParam(required=true,defaultValue=1/*error here*/) int veri){
    return veri;
}

any help would be appreciated.

Answer 1

Try with "" around integer to make it string as the defaultValue is implemented as String.

@RequestMapping("/returnVeriable")
public int getVeriable(@RequestParam(required=true,defaultValue="1") Integer veri){
    return veri;
}

refer : https://jira.spring.io/browse/SPR-5915

Answer 2

When a value traffic by HTTP protocol, it has no type. It's a String. And so it is at this parameter type at the annotation. Then, you do something like this:

@RequestParam(required = true, defaultValue = "1") Integer veri

And it will work fine.

Answer 3

This should work

@RequestMapping("/returnVariable")
public int getVariable(@RequestParam(required=true,defaultValue="1") int var) {
    return var;
}

By default what ever you pass to the controller is treated as String and converted to respective types. So even default values need to be set as String