Importing Json object to Java object

[sofi]

Hello Everyone,

In my java application I have JSON object and i want to import this object to my Java Object (representing of my own class).

I have done this task in C#,have been searching so much for Java,but could not
find anything helpful. Can anyone suggest me how to deal with it???


Thanks for Attention

[welsh]

From google I found a blog post showing how to convert objects to and from JSON located here: http://www.mkyong.com/java/how-do-co...rmat-gson-api/, this uses the GSon library.

First result from a google search of "convert java object from json"

[sofi]

Tnx much for ur reply,

I have seen before that JSON convertion, but i think you didnt get me. I want my JSON object to be serialized on the Object (That object is declared from my class, usually this class contains other objects declaration and so on).
In C# I have created several classes. Then i have one biggest class containing other objects. Then I use JsonConvert.Import to Map whole JSon object to my object. Want to do the same in Java.

Do u have any idea how to do this?

[welsh]

I think I understand what your getting (maybe), so let me do a quick example.

You have 3 classes like:

public class PojoOne
{
	private int id;
	private String name;
	private PojoTwo pojoTwo;

	// Constructors, Getters and Setters below
}

public class PojoTwo
{
	private int id;
	private ArrayList<PojoThree> pojoThreeList;

	// Constructors, Getters and Setters below
}

public class PojoThree
{
	private int id;
	private String name;
	private String attribute;

	// Constructors, Getters and Setters below
}

So as like you said, I have one class PojoOne which contains PojoTwo and that contains an ArrayList of PojoThree classes.

You can convert this to JSON and back to a PojoOne object (and all its sub objects) with Gson like so:

public class App 
{
    public static void main( String[] args )
    {
        PojoOne pojoOne = new PojoOne();
        
        pojoOne.setId(0);
        pojoOne.setName("myPojoOne");
        
        pojoOne.getPojoTwo().setId(1);
        pojoOne.getPojoTwo().getPojoThreeList().add(new PojoThree(2, "myPojoThree0", "hello world"));
        pojoOne.getPojoTwo().getPojoThreeList().add(new PojoThree(3, "myPojoThree1", "bye world"));
        
        Gson gson = new Gson();
        String json = gson.toJson(pojoOne);
        
        PojoOne obj = gson.fromJson(json, PojoOne.class);
    }
}

And this maps it all perfectly back. (From this small example I've shown).

Is this what you were asking?

[sofi]

Thank you so much for ur help.

I think am going correctly in my project.