Baeldung
baeldung.com › home › json › jackson › intro to the jackson objectmapper
Intro to the Jackson ObjectMapper | Baeldung
December 9, 2025 - Jackson is a solid and mature JSON serialization/deserialization library for Java. The ObjectMapper API provides a straightforward way to parse and generate JSON response objects with a lot of flexibility.
DigitalOcean
digitalocean.com › community › tutorials › jackson-json-java-parser-api-example-tutorial
Jackson JSON Java Parser API Example Tutorial | DigitalOcean
August 3, 2022 - Jackson JSON Parser API provides easy way to convert JSON to POJO Object and supports easy conversion to Map from JSON data. Jackson supports generics too and directly converts them from JSON to object. For our example for JSON to POJO/Java object conversion, we will take a complex example ...
Videos
08:52
Read JSON using Jackson in Java - YouTube
06:58
Intro to JSON and Jackson's ObjectMapper | Parse JSON in Java | ...
16:43
52. Why Do We Need JSON Parser In Rest Assured? |Jackson Databind| ...
15:32
Parsing Json in Java Tutorial - Part 1: Jackson and Simple Objects ...
08:21
How to parse JSON in Java(Jackson): The EASY WAY - YouTube
14:54
How to Parse JSON with Java (using Jackson and JSONGen) - YouTube
Factsheet
Stable release 2.19.2
/ July 18, 2025; 6 months ago (2025-07-18)
/ July 18, 2025; 6 months ago (2025-07-18)
Operating system Cross-platform
Stable release 2.19.2
/ July 18, 2025; 6 months ago (2025-07-18)
/ July 18, 2025; 6 months ago (2025-07-18)
Operating system Cross-platform
GitHub
github.com › FasterXML › jackson
GitHub - FasterXML/jackson: Main Portal page for the Jackson project · GitHub
More than that, Jackson is a suite of data-processing tools for Java (and the JVM platform), including the flagship streaming JSON parser / generator library, matching data-binding library (POJOs to and from JSON) and additional data format ...
Starred by 9.7K users
Forked by 1.2K users
Fasterxml
fasterxml.github.io › jackson-core › javadoc › 2.8 › com › fasterxml › jackson › core › JsonParser.html
JsonParser (Jackson-core 2.8.0 API)
Method to deserialize JSON content into a Java type, reference to which is passed as argument. Type is passed using so-called "super type token" and specifically needs to be used if the root type is a parameterized (generic) container type. Note: method can only be called if the parser has ...
Mkyong
mkyong.com › home › java › how to parse json string with jackson
How to parse JSON string with Jackson - Mkyong.com
April 23, 2024 - package com.mkyong.json.jackson; import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.ObjectMapper; public class BasicJsonArrayExample { public static void main(String[] args) { try { // a simple JSON array String json = "[" + "{\"name\": \"mkyong\", \"age\": 20}," + "{\"name\": \"ah pig\", \"age\": 40}," + "{\"name\": \"ag dog\", \"age\": 30}" + "]"; // Jackson main object ObjectMapper mapper = new ObjectMapper(); // read the json strings and convert it into JsonNode JsonNode arrayNode = mapper.readTre
Top answer 1 of 2
8
You can use the Jackson tree model and JsonNode#at(...) method which takes the Json Pointer expression as a parameter.
Here is an example:
public class JacksonJsonPointer {
static final String JSON = "{"
+ " \"person\": {"
+ " \"name\": \"Eric\","
+ " \"surname\": \"Ericsson\","
+ " \"address\": {"
+ " \"city\": \"LA\","
+ " \"street\": \"...\""
+ " }"
+ " }"
+ "}";
public static void main(String[] args) throws IOException {
final ObjectMapper mapper = new ObjectMapper();
final JsonNode json = mapper.readTree(JSON);
System.out.println(json.at("/person/name"));
System.out.println(json.at("/person/address/city"));
}
}
Output:
"Eric"
"LA"
2 of 2
2
Yes Using Json parser you can parse your Json, Below is a sample example you can find more in jackson documentation
JsonParser jsonParser = new JsonFactory().createJsonParser(jsonStr);
while(jsonParser.nextToken() != JsonToken.END_OBJECT){
String name = jsonParser.getCurrentName();
if("name".equals(name)) {
jsonParser.nextToken();
System.out.println(jsonParser.getText());
}
if("surname".equals(name)) {
jsonParser.nextToken();
System.out.println(jsonParser.getText());
}
if("city".equals(name)) {
jsonParser.nextToken();
System.out.println(jsonParser.getText());
}
}
Reflectoring
reflectoring.io › jackson
All You Need To Know About JSON Parsing With Jackson
July 14, 2022 - We can choose to parse the JSON to a Java Map, which is very convenient if we don’t know what to expect from the JSON file we are trying to parse. ObjectMapper will turn the name of each variable in the JSON to a Map key and the value of that variable to the value of that key. public class JacksonTest { ...
Fasterxml
fasterxml.github.io › jackson-core › javadoc › 2.5 › com › fasterxml › jackson › core › JsonParser.html
JsonParser (Jackson-core 2.5.0 API)
Method to deserialize JSON content into a Java type, reference to which is passed as argument. Type is passed using so-called "super type token" and specifically needs to be used if the root type is a parameterized (generic) container type. Note: method can only be called if the parser has ...
TutorialsPoint
tutorialspoint.com › home › jackson › jackson jsonparser
Jackson JSONParser - Efficient JSON Processing in Java
January 11, 2015 - JsonParser is the base class to define public API for reading Json content. Instances are created using factory methods of a JsonFactory instance. Following is the declaration for com.fasterxml.jackson.core.JsonParser class:
GitHub
github.com › FasterXML › jackson-1 › blob › master › src › java › org › codehaus › jackson › JsonParser.java
jackson-1/src/java/org/codehaus/jackson/JsonParser.java at master · FasterXML/jackson-1
* Method to deserialize JSON content into a non-container · * type (it can be an array type, however): typically a bean, array · * or a wrapper type (like {@link java.lang.Boolean}). * <b>Note</b>: method can only be called if the parser has · * an object codec assigned; this is true for parsers constructed · * by {@link org.codehaus.jackson.map.MappingJsonFactory} but ·
Author FasterXML
Fasterxml
fasterxml.github.io › jackson-core › javadoc › 2.9 › com › fasterxml › jackson › core › JsonParser.html
JsonParser (Jackson-core 2.9.0 API)
Method to deserialize JSON content into a Java type, reference to which is passed as argument. Type is passed using so-called "super type token" and specifically needs to be used if the root type is a parameterized (generic) container type. Note: method can only be called if the parser has ...
Fasterxml
fasterxml.github.io › jackson-core › javadoc › 2.11 › com › fasterxml › jackson › core › JsonParser.html
JsonParser (Jackson-core 2.11.0 API)
Method to deserialize JSON content into a Java type, reference to which is passed as argument. Type is passed using so-called "super type token" and specifically needs to be used if the root type is a parameterized (generic) container type. Note: method can only be called if the parser has ...
Attacomsian
attacomsian.com › blog › jackson-read-json-file
How to Read JSON from a file using Jackson
October 14, 2022 - try { // create object mapper instance ObjectMapper mapper = new ObjectMapper(); // convert JSON array to list of books List<Book> books = Arrays.asList(mapper.readValue(Paths.get("books.json").toFile(), Book[].class)); // print books books.forEach(System.out::println); } catch (Exception ex) { ex.printStackTrace(); } ... Book{title='Thinking in Java', isbn='978-0131872486', year=1998, authors=[Bruce Eckel]} Book{title='Head First Java', isbn='0596009208', year=2003, authors=[Kathy Sierra, Bert Bates]} For more Jackson examples, check out the How to read and write JSON using Jackson in Java tutorial.
Top answer 1 of 2
4
With Jackson, you can do the following:
ObjectMapper mapper = new ObjectMapper();
TypeReference<Map<String, Object>> typeRef = new TypeReference<Map<String, Object>>() {};
Map<String, Object> data = mapper.readValue(json, typeRef);
If you prefer to use a custom class to hold the values instead of a Map, use:
ObjectMapper mapper = new ObjectMapper();
Data data = mapper.readValue(json, Data.class);
public class Data {
@JsonProperty("Test1")
private Job test1;
@JsonProperty("Test2")
private Job test2;
// Default constructor, getters and setters
}
public class Job {
private String jobId;
private String jobName;
private String jobInput;
// Default constructor, getters and setters
}
2 of 2
0
How about just let Jackson parse a Map? Make the return type as Map<String, YourFirstDTO> and I think it will do.
Kiodev
kiodev.com › jackson-json-parser
Jackson JSON Parser | KioDev
Now you should be ready to use Jackson in your code. Its been super cold here in Denver the past few days, so I’m going to use the PokeAPI JSON response for Articuno (an ice Pokemon) for our example JSON.** The response is quite long so I won’t be pasting it directly here. Check it out by hitting `http://pokeapi.co/api/v2/pokemon/144/` on your favorite API tool (or just type it in on PokeAPI’s homepage). Create a new Java ...