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JavaScriptSerializer: Serialize objects

JavaScriptSerializer: Serialize objects

Sunday, August 23, 2020 ⁃ Difficulty: Intermediate

Objective

Create a Java program that serialize and deserialize objects in JSON format. To do this, you can use the JavaScriptSerializer class included in the System.Web.Extensions namespace.

First implement a Person class with three properties (Name, Age and City). The City class will have two properties (Name and Population). Then create a person object and use the serializer of the JavaScriptSerializer object to save the data in file.json, later deserialize the file.json and print it on the screen. Remember to prepare a ToString() method to print the Person class.

Input

Output

Solution

JSONJavaScriptSerializer.java

using System;
using System.IO;
using System.Text;
using System.Web.Script.Serialization;

public class JSONJavaScriptSerializer
{
    static string nameFile = "out.json";

    public static void Main(string[] args)
    {
        Person person = new Person()
        {
            Name = "Nauj",
            Age = 26,
            City = new City()
            {
                Name = "Spain",
                Population = 13456766
            }
        };

        Serialize(person);
        person = Deserialize();

        Console.WriteLine(person.ToString());
        Console.ReadLine();
    }

    public static void Serialize(Person p)
    {
        JavaScriptSerializer js = new JavaScriptSerializer();
        string jsonData = js.Serialize(p);

        File.WriteAllText(nameFile, jsonData);
    }

    public static Person Deserialize()
    {
        JavaScriptSerializer js = new JavaScriptSerializer();
        string jsonData =  File.ReadAllText(nameFile);
        Person person = js.Deserialize<Person>(jsonData);

        return person;
    }

    public class Person
    {
        public string Name { get; set; }
        public int Age { get; set; }
        public City City { get; set; }

        public override string ToString()
        {
            StringBuilder str = new StringBuilder();

            str.AppendLine("Name: " + Name);
            str.AppendLine("Age: " + Age);
            str.AppendLine("City: " + City.Name);

            return str.ToString();
        }
    }

    public class City
    {
        public string Name { get; set; }
        public int Population { get; set; }
    }
}

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