Spring 2nd RequestParam always ignored

Question

I might need your help to understand why my Java Spring code is not working.

I have a HTTP Get Method, in which I'd like to pass two request parameters. While the first parameter is passed perfectly fine, the second one is always null or empty.

This is what the beginning of the Method looks like.

@RequestMapping(value = "/session/{sessionID}", method = RequestMethod.GET)
public ResponseEntity<List<SensordataDTO>> getSensordataBySessionID(
    @PathVariable("sessionID") long sessionID,
    @RequestParam(required = false, name = "startSequence") Optional<Long> startSequence,
    @RequestParam(required = false, name = "endSequence") Optional<Long> endSequence) {

I tried different types for the RequestParam like long, Long and Optional. I also tried to specify the default value =, name =, value = parameters in the @RequestParam annotation. But no matter what, the second parameter in the url is always null / empty string.

In case I do something wrong with the url itself, I formated it this way:

"/session/1?startSequence=4&?endSequence=6"

I hope you have an idea what I am missing.

`"/session/1?startSequence=4&?endSequence=6"` should be `"/session/1?startSequence=4&endSequence=6"` closing as typo, or is the question really how to add multiple request params in a query string? — baao, Jun 14 '18 at 20:19

score 1 · Answer 1 · edited Jun 15 '18 at 00:09

1

Your request

/session/1?startSequence=4&?endSequence=6

As it should be, the first part of a RequestParam starts with a ? and any following requestParams start with an &.

That being said, your request should look like this.

/session/1?startSequence=4&endSequence=6

All that was changed was the removal of your second ?.

edited Jun 15 '18 at 00:09

Marc Estrada

1,657
10
20

answered Jun 14 '18 at 20:41

Dean

13
1

Try to format a little bit more your code snippets or in this case the URL paths. – Marc Estrada Jun 14 '18 at 21:07

score 0 · Accepted Answer · answered Jun 14 '18 at 20:41

0

Change it:

"/session/1?startSequence=4&?endSequence=6"

For it:

"/session/1?startSequence=4&endSequence=6"

The ? is used at only first parameter, after it you can add more parameters using &.

answered Jun 14 '18 at 20:41

Allan Braga

460
5
19

Spring 2nd RequestParam always ignored

2 Answers2