The correct json path expression would be "/aaa/0/value1"
Use:
jsonNode.at("/aaa/0/value1")
Makeseleniumeasy
makeseleniumeasy.com › 2020 › 09 › 16 › rest-assured-tutorial-46-fetch-value-from-json-array-using-jsonnode-jackson-get-path-methods
REST Assured Tutorial 46 – Fetch Value From JSON Array Using JsonNode – Jackson – Get() & Path() Methods
We can get the value of a node using get() and path() methods of JsonNode class. We need to extract value with appropriate data types after using get() and path() methods. We just need to use an index to fetch an element of an array which is the core concept of an array.
Top answer 1 of 3
9
The correct json path expression would be "/aaa/0/value1"
Use:
jsonNode.at("/aaa/0/value1")
2 of 3
1
use this below code :
JsonNode node = mapper.readTree(json);
System.out.println(node.path("aaa").get(0)); // {"value1":"123"}
- use jackson-databind.
- use this
node.path("aaa").get(0).get("value1") // 123.
Baeldung
baeldung.com › home › json › jackson › working with tree model nodes in jackson
Working with Tree Model Nodes in Jackson | Baeldung
January 8, 2024 - @Test public void givenANode_whenRemovingFromATree_thenCorrect() throws IOException { JsonNode rootNode = ExampleStructure.getExampleRoot(); ((ObjectNode) rootNode).remove("company"); assertTrue(rootNode.path("company").isMissingNode()); } Let’s iterate over all the nodes in a JSON document and reformat them into YAML. JSON has three types of nodes, which are Value, Object and Array.
Jenkov
jenkov.com › tutorials › java-json › jackson-jsonnode.html
Jackson JsonNode
The at() method returns a JsonNode which represents the JSON field you requested. To get the actual value of the field you need to call one of the methods covered in the next section.
Top answer 1 of 2
10
Perhaps this blog entry might help: Traversing JSON trees with Jackson?
I am not sure which exact problem you have, but one thing to note is that JSON Arrays are traversed by passing index of entry, NOT the name. So whereas you would use objectNode.get("key"), you use arrayNode.get(0) instead.
Or, if you want to play safe and allow "missing" entries, use arrayNode.path(0) (and ditto for JSON Objects).
Also remember that you can go back between JSON Trees (JsonNode) and POJOs; ObjectMapper has multiple methods for converting between representations (convertValue(), readAsTree(), treeToValue(), valueToTree()). So it is possible to use data-binding for some parts, tree model for others; sometimes binding sub-trees as POJOs, other times just data-binding high-level and accessing sub-trees using tree model. This is a very powerful way to do things, but takes a while getting used to.
Hope this helps!
2 of 2
1
In Google's GSON if you create a POJO that lacks some properties, then the coresponding JSON is ignored. It populates only those properties that have matching names. Why not create a class like this :
Query{
Pages{
Word[] Links;
}
}
Word{
String word;
String code;
}
and then use LambdaJ to avoid writing all the loops to get the words?
If that is not attractive look here and try JSONPath
Lots of document databases out there like MongoDB and RavenDB etc use JSON as their format for storage. Querying complex JSON is built into them, use the same libraries that they are using.
Fasterxml
fasterxml.github.io › jackson-databind › javadoc › 2.7 › com › fasterxml › jackson › databind › JsonNode.html
JsonNode (jackson-databind 2.7.0 API)
This allows for convenient and ... by: fieldNames in interface TreeNode · public final JsonNode at(JsonPointer ptr) Method for locating node specified by given JSON pointer instances....
Mkyong
mkyong.com › home › java › jackson tree model examples
Jackson Tree Model examples - Mkyong.com
April 29, 2024 - System.out.println("firstName : " + nameNode.path("first").asText()); System.out.println("middleName : " + nameNode.path("middle").asText()); System.out.println("lastName : " + nameNode.path("last").asText()); } // Get Contact JsonNode contactNode = root.path("contact"); if (contactNode.isArray()) { System.out.println("Is this node an Array?
SourceForge
argo.sourceforge.net › javadoc › argo › jdom › JsonNode.html
JsonNode (Argo version 7.6)
Determines whether the node at the given path exists and is a JSON array. ... pathElements - a series of Strings, representing the names of fields on objects, and Integers, representing elements of arrays indicating how to navigate from this node. ... Gets a List of JsonNodes, representing ...
Javadoc.io
javadoc.io › doc › com.fasterxml.jackson.core › jackson-databind › 2.12.3 › com › fasterxml › jackson › databind › JsonNode.html
JsonNode - jackson-databind 2.12.3 javadoc
Bookmarks · Latest version of com.fasterxml.jackson.core:jackson-databind · https://javadoc.io/doc/com.fasterxml.jackson.core/jackson-databind · Current version 2.12.3 · https://javadoc.io/doc/com.fasterxml.jackson.core/jackson-databind/2.12.3 · package-list path (used for javadoc generation ...
TutorialsPoint
tutorialspoint.com › how-to-access-the-json-fields-arrays-and-nested-objects-of-jsonnode-in-java
How to access the JSON fields, arrays and nested objects of JsonNode in Java?
May 13, 2025 - A JsonNode is Jackson's tree model for JSON. To read JSON into a JsonNode with Jackson by creating an ObjectMapper instance and call the readValue() method. We can access a field, array or nested object using the get() method of the JsonNode class.
Fasterxml
fasterxml.github.io › jackson-databind › javadoc › 2.6 › com › fasterxml › jackson › databind › node › ArrayNode.html
ArrayNode (jackson-databind 2.6.0 API)
This allows for convenient and safe chained access via path calls. ... This method is similar to JsonNode.get(int), except that instead of returning null if no such element exists (due to index being out of range, or this node not being an array), a "missing node" (node that returns true for JsonNode.isMissingNode()) will be returned.
GitHub
github.com › json-path › JsonPath › issues › 160
Accept Jackson's JsonNode and return List<JsonNode> · Issue #160 · json-path/JsonPath
December 2, 2015 - json-path / JsonPath Public · Notifications · You must be signed in to change notification settings · Fork 1.7k · Star 9.3k · New issueCopy link · New issueCopy link · Closed · Closed · Accept Jackson's JsonNode and return List<JsonNode>#160 · Copy link · oleg-gr ·
Author oleg-gr
Top answer 1 of 2
2
What you are trying to do is also called as Xpath in technical terms. It is used for html, xml based languages as well as now available in json
You can try jsonpath for this case:
https://www.baeldung.com/guide-to-jayway-jsonpath https://github.com/json-path/JsonPath
2 of 2
0
Google's popular GSON library has a method, namely getPath, maybe useful for your purpose:
String json = "...";
JsonReader reader = new JsonReader(new StringReader(json));
System.out.println(reader.getPath());
Tabnine
tabnine.com › home page › code › java › com.fasterxml.jackson.databind.jsonnode
com.fasterxml.jackson.databind.JsonNode.withArray java code examples | Tabnine
private static List<String> ...IELD_REQUIRED).isArray(), "'required' property must have type: array"); List<String> requiredList = new ArrayList<>(); ......
Red Hat
access.redhat.com › webassets › avalon › d › red-hat-jboss-enterprise-application-platform › 7.1.beta › javadocs › com › fasterxml › jackson › databind › JsonNode.html
JsonNode (Red Hat JBoss Enterprise Application Platform 7.1.0.Beta1 public API)
For non-container nodes returns 0; for arrays number of contained elements, and for objects number of fields. ... Method that returns true for all value nodes: ones that are not containers, and that do not represent "missing" nodes in the path.
Fasterxml
fasterxml.github.io › jackson-core › javadoc › 1.9 › org › codehaus › jackson › JsonNode.html
JsonNode (Jackson JSON Processor)
@Deprecated public final JsonNode getPath(String fieldName) Deprecated. Use path(String) instead · Alias of path(String). ... This method is similar to get(int), except that instead of returning null if no such element exists (due to index being out of range, or this node not being an array), a "missing node" (node that returns true for isMissingNode()) will be returned.
Makeseleniumeasy
makeseleniumeasy.com › 2020 › 09 › 17 › rest-assured-tutorial-47-fetch-value-from-nested-json-array-using-jsonnode-jackson-at-method
REST Assured Tutorial 47 – Fetch Value From Nested JSON Array Using JsonNode – Jackson – At() Method
September 17, 2020 - Above statement may be longer or complex if JSON object or JSON array is deeply nested. We can use at() method instead. We need to pass the path of target node similar to a file path.
Java Code Geeks
javacodegeeks.com › home › enterprise java
Simplified Json Array Operations with JsonNode in Jackson
May 6, 2024 - We’ll explore various methods like get(), createArrayNode(), and techniques involving Java’s StreamSupport and Iterator to streamline JSON array handling. Let’s dive into these methods step by step to enhance your JSON manipulation skills in Java. Jackson is a popular Java library used for JSON processing. JsonNode is a fundamental abstraction representing a node in the JSON tree structure, capable of representing various JSON types such as objects, arrays, strings, numbers, and more.
Fasterxml
fasterxml.github.io › jackson-databind › javadoc › 2.8 › com › fasterxml › jackson › databind › node › ArrayNode.html
ArrayNode (jackson-databind 2.8.0 API)
This allows for convenient and safe chained access via path calls. ... This method is similar to JsonNode.get(int), except that instead of returning null if no such element exists (due to index being out of range, or this node not being an array), a "missing node" (node that returns true for JsonNode.isMissingNode()) will be returned.
Baeldung
baeldung.com › home › json › jackson › simplified array operations on jsonnode without typecasting in jackson
Simplified Array Operations on JsonNode Without Typecasting in Jackson | Baeldung
June 27, 2025 - Explore various approaches to simplifying array operations on JsonNode without explicitly typecasting it to ArrayNode in Jackson.