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#Jackson2 seralization writemapper install

The main classes that jackson-js offers to serialize and deserialize JavaScript objects are: ObjectMapper, JsonStringifier and JsonParser. ObjectMapper, JsonParser and JsonStringifier classes In this article, I will present a basic example for each decorator. Most of the use cases of the Java FasterXML/jackson annotations are similar or equal. manage other JavaScript native types such as Maps and Sets.have different JSON response for some external application or manage different JSON data coming from other application (for example you need to communicate with a Spring Boot application that uses different JSON Schema for the same model or with other applications made with Python, PHP, etc…).

hide some properties for certain HTTP endpoints or some other external service.

preserve type information (using polymorphic type handling decorators: and A similar package is TypedJSON).

restore a JavaScript type (a similar package is class-transformer).

This library can be useful in more complex cases, for example when you want to:

it supports serialization/deserialization of other native JavaScript types: Map, Set, BigInt, Typed Arrays (such as Int8Array).

it supports cyclic object serialization/deserialization.

it supports more advanced Object concepts such as polymorphism and Object identity.

it not only deserialize JSON text into a JavaScript object, it also converts it into an instance of the class specified in the context option (similar packages are: class-transformer and TypedJSON) instead, with JSON.parse you will get just a simple plain (literal) JavaScript object (just Object type).

However, this library uses JSON.parse and JSON.stringify under the hood. With jackson-js, you can easily manipulate your JavaScript objects/values serialization/deserialization using decorators such as, ,, etc. Why this library? What’s the difference between using this library instead of JSON.parse and JSON.stringify ?įor simple cases, you don’t need this library, of course, you can just use JSON.parse and JSON.stringify to serialize/deserialize JSON.

#Jackson2 seralization writemapper install

You can install it using npm install -save jackson-js and it can be used on both client (browser) and server (Node.js) side. As the name implies, jackson-js decorators are heavily inspired by the Java annotations of the famous Java FasterXML/jackson library. Let's look at an example.After many hours of development, I finally released the first version of the jackson-js library. you also need to specify the name of the JSON property in parentheses next to the annotation. We're not going to go fancy here with our own custom serialization/deserialization code.Īnyhoo, let's start with plop that thing right on top of the Java field you want to map to a different JSON property.īut. The other methods only work in one direction.īy the way: all three of these methods make use of Jackson annotations. I like this first way the best because it works for both serialization and deserialization. you might want to serialize a Java object to a JSON object but you want to map one of the Java fields to a JSON property with a different name.Īnd in this guide, I'll show you multiple ways to handle that situation. There are occasions when you want to use Jackson to deserialize a JSON object to a Java object but you want to map one of the JSON properties to a Java field with a different name. Sometimes, you don't want to stay consistent.