Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java".

Jackson also allows you to parse or generate XML messages with the Jackson Dataformat XML Extension.

Jackson Dataformat XML Source Code files are provided in the source packge (jackson-dataformat-xml-2.14.0-sources.jar). You can download it at Jackson Maven Website.

You can also browse Jackson Dataformat XML Source Code below:

⏎ com/fasterxml/jackson/dataformat/xml/annotation/JacksonXmlText.java

package com.fasterxml.jackson.dataformat.xml.annotation;

import java.lang.annotation.*;

/**
 * Interface that is loosely similar to {@code jakarta.xml.bind.annotation.XmlValue}
 * in that it can be used on one (and only one!) property of a POJO.
 * It will result in value of the property be serialized without element wrapper,
 * as long as there are no element-wrapped other properties (attribute-valued
 * properties are acceptable).
 * It is also somewhat similar to core Jackson {@code @JsonValue} annotation; but
 * has to be separate as {@code @JsonValue} does not allow any other
 * properties.
 *<p>
 * Note that only one such property is allowed on a POJO: if multiple properties
 * are annotated, behavior is not defined.
 *<p>
 * Internally properties annotated will be considered to be properties with
 * no name (that is, with marker {@code ""} (empty String)).
 */
@Target({ElementType.ANNOTATION_TYPE, ElementType.FIELD, ElementType.METHOD,
    // @since 2.12 also allowed on (constructor) parameter
    ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
public @interface JacksonXmlText
{
    /**
     * Whether serialization of the property should always be done as basic
     * XML text or not; if true, will be, if false, not.
     */
    public boolean value() default true;
}

⏎ com/fasterxml/jackson/dataformat/xml/annotation/JacksonXmlText.java

Or download all of them as a single archive file:

File name: jackson-dataformat-xml-2.14.0-sources.jar
File size: 98015 bytes
Release date: 2022-11-05
Download 

⇒ Download Jackson Dataformat Binary Packages

⇐ Jackson Dataformat Extensions

⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library