FasterXML/jackson-dataformat-xml

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Extension for Jackson JSON processor that adds support for serializing POJOs as XML (and deserializing from XML) as an alternative to JSON

Stars: 631
Forks: 247
Open beginner issues: 0
Indexed issues: 39
Avg merge: 7d 9h
Merged PRs (30d): 13

Dominant language: Java
License: Apache-2.0
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 15, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

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39 open issues indexed

The version 2.18.10 seems to be released with class file version 61.0 / Java 17 Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

FasterXML/jackson-dataformat-xml#900 · 2 comments · 1 reaction · Opened Aug 19, 2026
XmlMapper with `FAIL_ON_UNKNOWN_PROPERTIES` fails on whitespace-only element Open

to-evaluate

Difficulty 3/5 1-2 days Newbie friendliness 68/100

FasterXML/jackson-dataformat-xml#892 · Opened Aug 10, 2026
Deserialization of heterogeneous list Open

3.x

Difficulty 4/5 3-5 days Newbie friendliness 25/100

FasterXML/jackson-dataformat-xml#787 · 1 comment · Opened Nov 21, 2025
Jackson XML reading mixed sibling nodes "overwriting" issue Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#712 · 3 comments · Opened Jan 26, 2025
Improve support for XML lists via `JsonNode` Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#695 · 4 comments · Opened Dec 17, 2024
Support XML element name based on runtime type Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

FasterXML/jackson-dataformat-xml#679 · 1 comment · Opened Oct 28, 2024
Write namespace declaration on root element only? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#670 · 4 comments · Opened Sep 11, 2024
Allow custom prefix for attributes name Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#667 · 4 comments · Opened Sep 2, 2024
How to avoid wstxns1: prefix Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

FasterXML/jackson-dataformat-xml#666 · 6 comments · Opened Aug 16, 2024
If there are HTML tags within XML tags, @JacksonXmlText will assign incorrect values to the content. Open

has-failing-test

Difficulty 4/5 3-5 days Newbie friendliness 25/100

FasterXML/jackson-dataformat-xml#623 · 7 comments · Opened Dec 14, 2023
Support retaining of XML attribute-ness with `JsonNode` Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

FasterXML/jackson-dataformat-xml#614 · 2 comments · 1 reaction · Opened Oct 8, 2023
XML attributes are not correctly populated when converting from XML (ObjectNode) to String using writeValueAsString (XML structure) Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#613 · 3 comments · 1 reaction · Opened Oct 1, 2023
Support for `StreamReadConstraints.maxDocumentLength` Open

3.x processing-limits

Difficulty 4/5 3-5 days Newbie friendliness 42/100

FasterXML/jackson-dataformat-xml#609 · 1 reaction · Opened Sep 11, 2023
JAXB `@XmlJavaTypeAdapter` not working in conjunction with `java.util.Optional` Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#588 · Opened Mar 27, 2023
Add support for @ prefixed attrib. in paths Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#573 · Opened Feb 22, 2023
JAXB `@XmlValue` deserializing not working with records Open

has-failing-test

Difficulty 4/5 3-5 days Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#559 · 6 comments · Opened Dec 1, 2022
Support case where element and attribute have same name Open

most-wanted name-collision

Difficulty 4/5 3-5 days Newbie friendliness 30/100

FasterXML/jackson-dataformat-xml#555 · 4 comments · 1 reaction · Opened Nov 13, 2022
Polymorphic deserialization based on root tag Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

FasterXML/jackson-dataformat-xml#537 · 1 comment · 2 reactions · Opened Jun 30, 2022
`XmlMapper` output not well-formed when Object keys use invalid XML name characters Open

test-needed

Difficulty 4/5 3-5 days Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#511 · 1 comment · Opened Jan 12, 2022
Support `SerializationFeature.WRAP_ROOT_VALUE` for XML backend too Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

FasterXML/jackson-dataformat-xml#494 · Opened Sep 19, 2021
Type-safe record wrappers to serialize as XML Attributes Open

record

Difficulty 4/5 3-5 days Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#558 · 3 comments · 1 reaction · Opened Sep 13, 2021
Support extracting the whole DOM model under given XML element Open

most-wanted

Difficulty 5/5 Over a week Newbie friendliness 30/100

FasterXML/jackson-dataformat-xml#417 · 1 comment · 23 reactions · Opened Jul 16, 2020
Problem trying to generate XML with dynamic list entry tags Open

jaxb-type-id

Difficulty 3/5 1-2 days Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#400 · 7 comments · Opened May 15, 2020
Collection values overwritten if item elements are not contiguous (mixed content) Open

mixed-content will-not-fix

Difficulty 4/5 3-5 days Newbie friendliness 42/100

FasterXML/jackson-dataformat-xml#363 · 5 comments · 6 reactions · Opened Oct 5, 2019
Hard coding for Indexed type item/wrapper name removes all possiblity of customization Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#356 · 7 comments · Opened Aug 16, 2019
Suggestion: serializing primitive values as attributes by default Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

FasterXML/jackson-dataformat-xml#320 · 1 comment · 1 reaction · Opened Nov 8, 2018
XML Serialization + JsonAnyGetter as attributes Open

3.x

Difficulty 5/5 Over a week Newbie friendliness 25/100

FasterXML/jackson-dataformat-xml#309 · 3 comments · Opened Sep 20, 2018
Add support for non-blocking ("async") XML parsing Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

FasterXML/jackson-dataformat-xml#260 · 4 comments · 23 reactions · Opened Sep 5, 2017
If array property contents are split across separate elements, earlier values are overwritten Open

Difficulty 3/5 1-2 days Newbie friendliness 28/100

FasterXML/jackson-dataformat-xml#251 · 7 comments · Opened Jul 19, 2017
Serializing `Map`s will produce non-well-formed XML as keys are not modified as per XML name rules Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#244 · 11 comments · Opened Jun 20, 2017
Each list element is wrapped into an extra tag with the name of the list property (RFE: combine type id, property name) Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

FasterXML/jackson-dataformat-xml#230 · 15 comments · 6 reactions · Opened Apr 24, 2017
Allow preserving "is-attribute" with JsonNode to write output as attribute value Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#217 · 2 comments · 1 reaction · Opened Dec 9, 2016
XML serialization on list of polymorphic values does not combine property, type id Open

jaxb-type-id most-wanted

Difficulty 4/5 3-5 days Newbie friendliness 25/100

FasterXML/jackson-dataformat-xml#197 · 2 comments · 3 reactions · Opened Jun 7, 2016
Allow enabling XML validation (DTD, XML Schema, RelaxNG) during deserialization? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

FasterXML/jackson-dataformat-xml#154 · 2 reactions · Opened Jun 5, 2015
Using `@XmlAttribute` for property with non-scalar type prevents serialization as attribute for other properties Open

has-failing-test

Difficulty 4/5 3-5 days Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#128 · 5 comments · Opened Nov 26, 2014
Support some form of custom escaping of XML values written using Stax (Woodstox/Aalto) functionality Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#75 · 10 comments · 2 reactions · Opened Aug 19, 2013
Attribute / element name collision (same local name, different namepace) cannot be configured during deserialization Open

most-wanted name-collision

Difficulty 4/5 3-5 days Newbie friendliness 45/100

FasterXML/jackson-dataformat-xml#65 · 9 comments · 8 reactions · Opened May 13, 2013
Support for providing namespace to use for fields of a Class (unless overridden by field) Open

most-wanted

Difficulty 5/5 Over a week Newbie friendliness 35/100

FasterXML/jackson-dataformat-xml#18 · 29 comments · 5 reactions · Opened Mar 13, 2012
Make `JsonTypeInfo As.WRAPPER_ARRAY` work Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

FasterXML/jackson-dataformat-xml#4 · 2 comments · Opened Jan 3, 2011

FasterXML/jackson-dataformat-xml

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