JarCastingJava library to serialize and deserialize Java objects to (and from) JSON
Introduction
DNJson uses reflection so it does not require additional modifications to classes of (de)serialized objects. In fact it just needs the class to have defined default no-args constructor (not entirely true, see Features).
This library compatible with Java 6+
Contents
Getting started
Download
Gradle:
compile 'com.github.fedorchuck:dnjson:0.1.0'
Maven:
<dependency>
<groupId>com.github.fedorchuck</groupId>
<artifactId>dnjson</artifactId>
<version>0.1.0</version>
</dependency>
JAR-files:
https://oss.sonatype.org/content/repositories/releases/com/github/fedorchuck/dnjson/
Usage
The following example demonstrates the most basic usage of DNJson when serializing a sample object:
public class Car {
private String manufacturer;
private String model;
private Double capacity;
private boolean accident;
private Car() {
}
public Car(String manufacturer, String model, Double capacity, boolean accident) {
this.manufacturer = manufacturer;
this.model = model;
this.capacity = capacity;
this.accident = accident;
}
@Override
public String toString() {
return("Manufacturer: " + manufacturer + ", " + "Model: " + model + ",
" + "Capacity: " + capacity + ", " + "Accident: " + accident);
}
}
public class Person {
private String name;
private String surname;
private Car[] cars;
private int phone;
private transient int age;
private Person() {
}
public Person(String name, String surname, int phone, int age, Car[] cars) {
this.name = name;
this.surname = surname;
this.cars = cars;
this.phone = phone;
this.age = age;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("Name: " + name + " " + surname + "\n");
sb.append("Phone: " + phone + "\n");
sb.append("Age: " + age + "\n");
int i = 0;
for (Car item : cars) {
i++;
sb.append("Car " + i + ": " + item + "\n");
}
return sb.toString();
}
}
After calling
DNJson dnjson = new DNJson();
Car audi = new Car("Audi", "A4", 1.8, false);
Car skoda = new Car("Škoda", "Octavia", 2.0, true);
Car[] cars = {audi, skoda};
Person johnDoe = new Person("John", "Doe", 245987453, 35, cars);
System.out.println(dnjson.toJson(johnDoe));
you will get this output:
{
"name": "John",
"surname": "Doe",
"cars": [
{
"manufacturer": "Audi",
"model": "A4",
"capacity": 1.8,
"accident": false
},
{
"manufacturer": "Škoda",
"model": "Octavia",
"capacity": 2,
"accident": true
}
],
"phone": 245987453
}
Since the Person's field age is marked as transient, it is not included in the output.
To deserialize output produced by last example, you can execute the following code:
DNJson dnjson = new DNJson();
String json =
"{\"name\":\"John\",\"surname\":\"Doe\",\"cars\":
[{\"manufacturer\":\"Audi\",\"model\":\"A4\",\"capacity\":1.8,\"accident\":false},
{\"manufacturer\":\"Škoda\",\"model\":\"Octavia\",\"capacity\":2.0,\"accident\":true}],
\"phone\":245987453}";
Person johnDoe = dnjson.fromJson(json, Person.class);
System.out.println(johnDoe.toString());
And the following output will be generated:
Name: John Doe
Phone: 245987453
Age: 0
Car 1: Manufacturer: Audi, Model: A4, Capacity: 1.8, Accident: false
Car 2: Manufacturer: Škoda, Model: Octavia, Capacity: 2.0, Accident: true
Changelog
See changelog file
License
This software is licensed under Apache License 2.0