Fix #1324: Add @JsonAlias support to SimplePageable for SNAKE_CASE compatibility

[weslyvinicius]

Fixes #1324

When a global PropertyNamingStrategies.SNAKE_CASE is configured, deserialization of Page fails because SimplePageable only accepted camelCase property names.

This PR adds @JsonProperty + @JsonAlias to the constructor parameters, supporting:

pageNumber / page_number / page-number / pagenumber
pageSize / page_size / page-size / pagesize
Tested with the reproduction case provided in the issue (global SNAKE_CASE + WireMock returning snake_case JSON).

[Copilot]

Pull request overview

This PR fixes issue #1324 by adding @JsonAlias support to the SimplePageable class in PageJacksonModule, enabling proper deserialization of Spring Data Page objects when a global Jackson PropertyNamingStrategy (such as SNAKE_CASE) is configured. Previously, the hardcoded @JsonProperty annotations with camelCase names conflicted with global naming strategies, causing deserialization failures.

Changes:

• Added @JsonAlias annotations to SimplePageable constructor parameters to support multiple naming conventions (snake_case, kebab-case, lowercase, PascalCase)
• Added comprehensive test coverage with 4 new test methods and JSON fixtures for different naming strategies
• Maintains backward compatibility by keeping camelCase as the primary @JsonProperty value

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/support/PageJacksonModule.java	Added @JsonAlias annotations to SimplePageable constructor parameters for pageNumber and pageSize to support multiple naming conventions
spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/support/PageJacksonModuleTests.java	Added 4 test methods to verify deserialization with different PropertyNamingStrategies (KEBAB_CASE, SNAKE_CASE, LOWER_CASE, UPPER_CAMEL_CASE)
spring-cloud-openfeign-core/src/test/resources/withPageableAliasHyphen.json	Test fixture with kebab-case naming (page-number, page-size)
spring-cloud-openfeign-core/src/test/resources/withPageableAliasUnderscore.json	Test fixture with snake_case naming (page_number, page_size)
spring-cloud-openfeign-core/src/test/resources/withPageableAliasLowercase.json	Test fixture with lowercase naming (pagenumber, pagesize)
spring-cloud-openfeign-core/src/test/resources/withPageableAliasPascalCase.json	Test fixture with PascalCase naming (PageNumber, PageSize)

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