No need to go with GSON for this; Jackson can do either plain Maps/Lists:
ObjectMapper mapper = new ObjectMapper();
Map<String,Object> map = mapper.readValue(json, Map.class);
or more convenient JSON Tree:
JsonNode rootNode = mapper.readTree(json);
By the way, there is no reason why you could not actually create Java classes and do it (IMO) more conveniently:
public class Library {
@JsonProperty("libraryname")
public String name;
@JsonProperty("mymusic")
public List<Song> songs;
}
public class Song {
@JsonProperty("Artist Name") public String artistName;
@JsonProperty("Song Name") public String songName;
}
Library lib = mapper.readValue(jsonString, Library.class);
Top answer 1 of 8
278
No need to go with GSON for this; Jackson can do either plain Maps/Lists:
ObjectMapper mapper = new ObjectMapper();
Map<String,Object> map = mapper.readValue(json, Map.class);
or more convenient JSON Tree:
JsonNode rootNode = mapper.readTree(json);
By the way, there is no reason why you could not actually create Java classes and do it (IMO) more conveniently:
public class Library {
@JsonProperty("libraryname")
public String name;
@JsonProperty("mymusic")
public List<Song> songs;
}
public class Song {
@JsonProperty("Artist Name") public String artistName;
@JsonProperty("Song Name") public String songName;
}
Library lib = mapper.readValue(jsonString, Library.class);
2 of 8
58
Check out Google's Gson: http://code.google.com/p/google-gson/
From their website:
Gson gson = new Gson(); // Or use new GsonBuilder().create();
MyType target2 = gson.fromJson(json, MyType.class); // deserializes json into target2
You would just need to make a MyType class (renamed, of course) with all the fields in the json string. It might get a little more complicated when you're doing the arrays, if you prefer to do all of the parsing manually (also pretty easy) check out http://www.json.org/ and download the Java source for the Json parser objects.
DevQA
devqa.io › how-to-parse-json-in-java
How to Parse JSON in Java
November 8, 2019 - First, we need to convert the JSON string into a JSON Object, using JSONObject class.
Converting Json to Java object
Jackson is a library that people use to deserialize json to Java. More on reddit.com
10
7
December 13, 2022Trying to parse keyless json in Java object
the [] indicate it is a JSON Array, not a JSON Object. In that case it is simply a list of values. More on reddit.com
4
1
January 3, 2014AWS Lambda (JAVA) problem while parse input JSON to pojo object.
Yes. Gson library is a good to use. We use it in our enterprise application. The only drawback is the additional size when packaging it for your lambda.
More on reddit.com 3
2
December 9, 2017Convert Java object to JSON without external library
Converting arbitrary objects to JSON isn't particularly easy, especially when there are full solutions already available. Personally, I use Gson, which is pretty easy to use. If the no external libraries is a HARD requirement, then your only choice would be to use reflection to get the names and values of the fields of the object to build the JSON string. You might have recursion problems if there are nested objects that create a circular loop, which complicates things. If you only have to serialize specific classes, then it would probably be easier to essentially hardcode the JSON string generation, and just call the appropriately getters to build the string. Basically, if it's only a few specific classes then you can write your own, if it's any arbitrary object then I highly recommend using a library, but if no libraries then I guess you could try homerolling your own JSON serializer with reflection. More on reddit.com
12
1
May 1, 2020Videos
02:44
How to convert JSON to Java objects using Gson - YouTube
22:27
Parse JSON using Java - YouTube
21:37
Convert Java to JSON & JSON to Java Object | Parse JSON in Java ...
17:31
Parse JSON to Java Object,ArrayList & Array Using Jackson Library ...
A quick tutorial on using JSON-simple parsing JSON ...
15:32
Parsing Json in Java Tutorial - Part 1: Jackson and Simple Objects ...
Stack Abuse
stackabuse.com › how-to-convert-json-object-to-java-object-with-jackson
How to Convert JSON Object to Java Object with Jackson
February 27, 2023 - To convert a JSON object into a Java object, you'll use the readValue() method of the ObjectMapper instance, which deserializes it into the provided class reference:
Scaler
scaler.com › topics › json-to-java-object
Convert JSON String to Java Object - Scaler Topics
March 21, 2024 - Here's an illustration showcasing a Java class reflecting a JSON object: The next step is to select a JSON parsing library for converting a JSON string into a Java object. Several widely used options in Java include Jackson, Gson, and JSON-B.
LinkedIn
linkedin.com › pulse › convert-json-java-object-spring-boot-dhruv-sahu
Convert JSON To Java Object in Spring Boot
July 18, 2021 - and Convert this into a Java Object to store and Perform CRUD operations. Thus, In this article, we'll take a look at unmarshalling the JSON data achieved using POST mapping and Storing it into our JAVA object.
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 ...
Oracle
oracle.com › java › technical details
Java API for JSON Processing
Listing 1. Example of JSON ... format with their RESTful web services. The Java API for JSON Processing (JSR 353) provides portable APIs to parse, generate, transform, and query JSON using object model and streaming APIs....
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › JSON › stringify
JSON.stringify() - JavaScript | MDN
The value to convert to a JSON string. ... A function that alters the behavior of the stringification process, or an array of strings and numbers that specifies properties of value to be included in the output. If replacer is an array, all elements in this array that are not strings or numbers (either primitives or wrapper objects), including Symbol values, are completely ignored.
Medium
medium.com › @AlexanderObregon › javas-jsonparser-parse-method-explained-76b126f6110e
Java’s JsonParser.parse() Method Explained | Medium
October 13, 2024 - It reads the JSON file and automatically converts it into a Java object, making it easier to work with structured data. Gson: Gson, developed by Google, is another popular library for working with JSON in Java. Like Jackson, it allows for object mapping, meaning JSON data can be converted into Java objects with minimal code. One of Gson’s strengths is its simplicity and small footprint, making it a lightweight option for developers who need JSON parsing but don’t want the full overhead of a large library.
Cloudera Community
community.cloudera.com › t5 › Support-Questions › Converting-JSON-to-Java-Object-Array › m-p › 153155
Solved: Converting JSON to Java Object Array - Cloudera Community - 153155
February 1, 2017 - Here is the correct example to parse your JSON. import java.io.IOException; import java.io.InputStreamReader; import java.io.Reader; import com.google.gson.Gson; import com.google.gson.GsonBuilder; public class JSONParser { public static void main(String[] args) throws IOException { try(Reader reader = new InputStreamReader(JsonToJava.class.getResourceAsStream("Server1.json"), "UTF-8")){ Gson gson = new GsonBuilder().create(); Person p = gson.fromJson(reader, Person.class); System.out.println(p); } } }
Reflectoring
reflectoring.io › jackson
All You Need To Know About JSON Parsing With Jackson
July 15, 2022 - ObjectMapper is the most commonly ... It lives in com.fasterxml.jackson.databind. The readValue() method is used to parse (deserialize) JSON from a String, Stream, or File into POJOs....
Transform
transform.tools › json-to-typescript
JSON to TypeScript
An online playground to convert JSON to TypeScript
Json2kt
json2kt.com › json-to-pojo.php
JSON to Java POJO Model Class Generator Online (Plain Old Java Object - POJO)
JSON 2 Kotlin (HOME) JSON 2 Swift JSON 2 POJO (Java) Tech Blog JSON Validator/Formatter JSON Examples KMP Project Privacy Policy Generator Report an Error · JSON to POJO online converter or generator is very helpful while you want to call API or Parse JSON object or array string.
Minifier
minifier.org › json-to-java
Convert JSON to Java Object Online
JSON to Java Converter effortlessly converts JSON data into Java class objects with a single click.
DevQA
devqa.io › map-json-string-to-java-object
How to Map a JSON String to a Java Object
July 11, 2023 - Finally, we can access the properties of the mapped object. Mapping a JSON string to a Java object is a common task in modern software development. In this blog post, we explored two popular libraries, Jackson and Gson, to achieve this goal. By following the provided steps and example code, you can easily map JSON data to Java objects in your projects.
Reddit
reddit.com › r/javahelp › converting json to java object
r/javahelp on Reddit: Converting Json to Java object
December 13, 2022 -
I want to convert the following text file into a java object list, HashMaps seem not complext enough as the text file is Json
info = [{"key":"1",
"request":"ok",
"group": "user"},{...},...{}]
Top answer 1 of 5
14
Jackson is a library that people use to deserialize json to Java.
2 of 5
9
there are many libraries, you need to choose one parsing to Map/List is common. Every object becomes a Map, every array becomes a List Your example can be parsed into a List> Or you can create MyClass with key, request and group fields, and parse into a List
Medium
medium.com › @sharma0purnima › three-ways-to-parse-rest-api-json-responses-in-java-569e570da9c1
Three Ways to Parse REST API JSON Responses in Java | by Purnima Sharma | Medium
July 18, 2024 - As a software quality assurance engineer with a passion for automation testing, I often find myself diving into the intricacies of parsing JSON responses from REST APIs. It’s not just about retrieving data; it’s about efficiently handling and utilizing that data within our test automation frameworks. In this article, I’ll guide you through three effective methods using popular Java libraries — Jackson and Gson — along with RestAssured, to parse JSON responses effortlessly.
GeeksforGeeks
geeksforgeeks.org › java › how-to-read-and-write-json-files-in-java
How to Read and Write JSON Files in Java? - GeeksforGeeks
February 4, 2026 - Then we created a public JsonFileReader class with a main method, and it throws an IOException. This shows that input/output exceptions could happen. Then an ObjectMapper instance is created. It coverting Java objects into JSON.
Adobe Experience League
experienceleaguecommunities.adobe.com › t5 › adobe-experience-manager › parse-json-in-sightly-js › td-p › 174577
Solved: Parse JSON in Sightly JS - Adobe Experience League Community - 174577
August 23, 2018 - If you are using Java-Use API then the one I have been using to map JSON to java objects is GSON. GSON is pretty handy in converting JSON to JAVA Object and vice-versa. ... To parse Json with sightly; define a Java class with the Sightly component. In the Java class, use a Java API that parses Json.
Dadroit
dadroit.com › string-to-json
Online String to JSON Converter
To convert String to JSON, visit the tool address, input your String data —or load your String file— and the tool will display the corresponding JSON output in real time.