How to provide default values for array parameters in spring MVC url mapping?

Question

@RequestMapping(value = "/getUserScoreCardDetails", method = RequestMethod.GET)
public @ResponseBody List<ScoreDetails> getUserScoreCardDetails(
@RequestParam(value = "playerIds", required = false) int[] playerIds) { 

}

I need to provide default values [1,2,3] for playerIds if playerIds is not available in request?

Monzurul Shimul · Accepted Answer · 2017-02-19 17:09:18Z

10

You can set comma separated values inside defaultValue property in @RequestParam

@RequestMapping(value = "/getUserScoreCardDetails", method = RequestMethod.GET)
public @ResponseBody List<ScoreDetails> getUserScoreCardDetails(
@RequestParam(value = "playerIds", required = false, defaultValue="1,2,3") int[] playerIds) { 

}

answered Feb 19, 2017 at 17:09

Monzurul Shimul

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8 Comments

Dhakchianandan Over a year ago

I tried this. But if playerIds is missing in request, playerIds is treated as null.

Monzurul Shimul Over a year ago

shouldn't be, this is well tested. please re.check

Monzurul Shimul Over a year ago

add System.out.println(Arrays.toString(playerIds)); inside the controller method and check the result.

Dhakchianandan Over a year ago

I verified the result. Its coming as null. Might be because of old spring version. I am using spring.3.0.0

Sean Connolly Over a year ago

If anyone wants to default to an empty array, defaultValue="" does the trick. Works with lists too.

|

Tahir Hussain Mir · Accepted Answer · 2017-02-20 05:15:57Z

0

Inside your method, just check, if playerIds is null and if it is null then specify the default values there like this

@RequestMapping(value = "/getUserScoreCardDetails", method =
RequestMethod.GET)

public @ResponseBody List<ScoreDetails> getUserScoreCardDetails(
@RequestParam(value = "playerIds", required = false) int[] playerIds) {
     if(playerIds==null){
         playerIds = {1,2,3};
     }
}

edited Feb 20, 2017 at 5:15

answered Feb 19, 2017 at 16:05

Tahir Hussain Mir

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4 Comments

Dhakchianandan Over a year ago

I did the same thing. Thought there should be some better approach

Tahir Hussain Mir Over a year ago

i have read about this, and this is the elegant way to solve this problem... Just do it that way.. @Dhakchianandan

Tahir Hussain Mir Over a year ago

what you did now?@Dhakchianandan

Dhakchianandan Over a year ago

i went with the above approach

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