olopsman

String input = '{"name":"paulo","age":42, "car" : {"model" : "outlander", "year" : "2016"}}';
Account a = (Account) JSON.deserialize(input, Account.class);
system.assertEquals(a.name, 'paulo');
system.debug(a);

olopsman

public class GetPerson {
  public String name {get;set;}
  public Integer age {get;set;}
  public Car car {get;set;}
  
  public class Car {
    public String model {get;set;}
    public String year {get;set;}
  }
}

olopsman

String input = '{"name":"paulo","age":42, "married":true, "car" : {"model" : "outlander", "year" : "2016"}}';
GetPerson person = (GetPerson) JSON.deserialize(input, GetPerson.class);
system.assertEquals(person.name, 'paulo');
system.assertEquals(person.car.model, 'outlander');

olopsman

String input = '[{"name":"paulo","age":42, "car" : {"model" : "outlander", "year" : "2016"}}, {"name":"tin","age":40, "car" : {"model" : "crv", "year" : "2004"}}]';
List<GetPerson> person = (List<GetPerson>) JSON.deserialize(input, List<GetPerson>.class);
system.assertEquals(person.size(), 2);

olopsman

String input = '{"name":"paulo","age":42, "car" : {"model" : "outlander", "year" : "2016"}}';
Account a = (Account) JSON.deserializeStrict(input, Account.class);

olopsman

[
  {
    "_id": "1",
    "name": "paulo",
    "age": 42,
    "car": {
      "model": "outlander",
      "year": "2016"
    },
    "kids": [

olopsman

public class GetPerson {

  public String x_id {get;set;}
  public String name {get;set;}
  public Integer age {get;set;}
  public List<String> kids {get;set;}
  public Car car {get;set;}
  
  public class Car {
    public String model {get;set;}

olopsman

String input = '[{"_id":"1","name":"paulo","age":42, "car" : {"model" : "outlander", "year" : "2016"}, "kids" : ["penny", "padma", "amber", "pauline"]}, {"_id":"2","name":"tin","age":40, "car" : {"model" : "crv", "year" : "2004"},"kids" : ["mary", "sophie", "patrice", "laeticia"]}]';

JSONParser parser = JSON.createParser(input);
List<GetPerson> gpList = new List<GetPerson>();

while(parser.nextToken() != JSONToken.END_ARRAY) { // we started with an array of objects
	GetPerson gp = new GetPerson();
	while(parser.nextToken() != JSONToken.END_OBJECT){ // loop through each object
		if(parser.getCurrentToken() == JSONToken.FIELD_NAME) { //token should be field name
			String attr = parser.getText(); //get the text of the field name

olopsman

public class GetPerson {
   public String x_id {get;set;}
   public String name {get;set;}
   public Integer age {get;set;}
   public List<String> kids {get;set;}
   public Car car {get;set;}

   public class Car {
      public String model {get;set;}
      public String year {get;set;}

olopsman

String input = '[{"_id":"1","name":"paulo","age":42, "car" : {"model" : "outlander", "year" : "2016"}, "kids" : ["penny", "padma", "amber", "pauline"]}, {"_id":"2","name":"tin","age":40, "car" : {"model" : "crv", "year" : "2004"},"kids" : ["mary", "sophie", "patrice", "laeticia"]}]';
List<GetPerson> gpList = GetPerson.parse(input);
system.debug(gpList);