Jackson Data Binding Source Code

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

  • Jackson Data Binding module allows you to converts JSON to and from POJO (Plain Old Java Object) using property accessor or using annotations.
  • Jackson Databind Source Code files are provided in the source packge (jackson-databind-2.12.4-sources.jar). You can download it at Jackson Maven Website.

    You can also browse Jackson Databind Source Code below:

    ✍: FYIcenter.com


    package com.fasterxml.jackson.databind.node;
    import java.io.IOException;
    import com.fasterxml.jackson.databind.JsonNode;
    import com.fasterxml.jackson.databind.ObjectReader;
    import com.fasterxml.jackson.databind.ObjectWriter;
    import com.fasterxml.jackson.databind.json.JsonMapper;
     * Helper class used to implement <code>toString()</code> method for
     * {@link BaseJsonNode}, by embedding a private instance of
     * {@link JsonMapper}, only to be used for node serialization.
     * @since 2.10 (but not to be included in 3.0)
    final class InternalNodeMapper {
        private final static JsonMapper JSON_MAPPER = new JsonMapper();
        private final static ObjectWriter STD_WRITER = JSON_MAPPER.writer();
        private final static ObjectWriter PRETTY_WRITER = JSON_MAPPER.writer()
        private final static ObjectReader NODE_READER = JSON_MAPPER.readerFor(JsonNode.class);
        // // // Methods for `JsonNode.toString()` and `JsonNode.toPrettyString()`
        public static String nodeToString(JsonNode n) {
            try {
                return STD_WRITER.writeValueAsString(n);
            } catch (IOException e) { // should never occur
                throw new RuntimeException(e);
        public static String nodeToPrettyString(JsonNode n) {
            try {
                return PRETTY_WRITER.writeValueAsString(n);
            } catch (IOException e) { // should never occur
                throw new RuntimeException(e);
        // // // Methods for JDK serialization support of JsonNodes
        public static byte[] valueToBytes(Object value) throws IOException {
            return JSON_MAPPER.writeValueAsBytes(value);
        public static JsonNode bytesToNode(byte[] json) throws IOException {
            return NODE_READER.readValue(json);



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    2022-03-29, 32313👍, 0💬