Spring UriBuilder replaceQueryParam suggests a way to handle nulls.

I expect replaceQueryParam to skip null values.

UriComponentsBuilder.newInstance()
                .queryParam("baz", "qux", 42)
                .replaceQueryParam("baz", (Object) null)
               .build()

expected query is null.

UriComponentsBuilder.newInstance()
                .queryParam("baz", "qux", 42)
                .replaceQueryParam("baz", null, 24)
               .build()

expected query is "baz=24"

Tell me what you think. Thanks.

Comment From: rstoyanchev

It is possible to have query parameters without a value, so baz&baz=&baz=42 so we can't do that. You'll need to clean null values from the List or check the single value for null. At best we can clarify in the Javadoc that null is a valid value which results in a query parameter without a value.

Comment From: spring-projects-issues

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Comment From: spring-projects-issues

Closing due to lack of requested feedback. If you would like us to look at this issue, please provide the requested information and we will re-open the issue.

Comment From: rstoyanchev

Note also that in 5.3 there is a new queryParamIfPresent(Optional) method.