[Fix][Serialize] prevent scientific notation for decimal numbers in JSON output​

[misi1987107]

Purpose of this pull request

subtask of #8949

Does this PR introduce any user-facing change?

How was this patch tested?

Check list

• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/seatunnel/tree/dev/docs
• If you are contributing the connector code, please check that the following files are updated:
  1. Update plugin-mapping.properties and add new connector information in it
  2. Update the pom file of seatunnel-dist
  3. Add ci label in label-scope-conf
  4. Add e2e testcase in seatunnel-e2e
  5. Update connector plugin_config
• Update the release-note.

[misi1987107]

copy PR from #9126, it can't pass ci test ,so i copy the PR

[Copilot]

Pull Request Overview

This pull request resolves bug 8949 by adjusting JSON serialization behavior for BigDecimal values and enhancing test coverage.

• Added a new unit test (testSerializationWithNumber) to verify that BigDecimal values are serialized as plain numbers.
• Configured the underlying Jackson mapper to write BigDecimal values in plain format.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
seatunnel-formats/seatunnel-format-json/src/test/java/org/apache/seatunnel/format/json/JsonRowDataSerDeSchemaTest.java	Added a new test to check proper serialization of numeric types with BigDecimal specialization.
seatunnel-formats/seatunnel-format-json/src/main/java/org/apache/seatunnel/format/json/JsonSerializationSchema.java	Configured the Jackson mapper to write BigDecimal as plain text to support the fix.

Comments suppressed due to low confidence (1)

seatunnel-formats/seatunnel-format-json/src/test/java/org/apache/seatunnel/format/json/JsonRowDataSerDeSchemaTest.java:690

• [nitpick] Consider using StandardCharsets.UTF_8 instead of Charset.forName("UTF-8") for consistency with the rest of the code.

JsonSerializationSchema jsonSerializationSchema = new JsonSerializationSchema(schema, Charset.forName("UTF-8"));

[Copilot]

[nitpick] Consider moving the mapper configuration from the instance initializer block into the constructor to ensure the initialization order is explicit.

[Copilot]

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (1)

seatunnel-formats/seatunnel-format-json/src/test/java/org/apache/seatunnel/format/json/JsonRowDataSerDeSchemaTest.java:691

• [nitpick] Consider adding additional test cases for BigDecimal values (e.g., with trailing zeros or varying precision) to further validate the serialization behavior.

Object[] fields = new Object[] {1, "1001015", BigDecimal.valueOf(80.00)};

[Copilot]

Pull Request Overview

This PR fixes the serialization behavior for BigDecimal values by preventing scientific notation in JSON outputs. It adds a new test case to validate that a decimal value is output in plain format and configures the JSON mapper accordingly.

• Added a test case for decimal number serialization.
• Configured the ObjectMapper to use plain BigDecimal formatting.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
seatunnel-format-json/src/test/java/org/apache/seatunnel/format/json/JsonRowDataSerDeSchemaTest.java	Added a test case to verify that a BigDecimal value is not output in scientific notation.
seatunnel-format-json/src/main/java/org/apache/seatunnel/format/json/JsonSerializationSchema.java	Updated the ObjectMapper configuration to write BigDecimal values as plain numbers.

Comments suppressed due to low confidence (1)

seatunnel-formats/seatunnel-format-json/src/test/java/org/apache/seatunnel/format/json/JsonRowDataSerDeSchemaTest.java:691

• Consider adding additional test cases with a range of BigDecimal values (including very small and very large numbers) to further ensure that scientific notation is consistently prevented.

Object[] fields = new Object[] {1, "1001015", BigDecimal.valueOf(80.00)};

[corgy-w]

@misi1987107 CI Try again and try again, feels successful soon

[corgy-w]

[misi1987107]

Thanks.