[
{
    "elementaryProductId":1,
    "bonusMalus":30,
    "deductible":500,
    "comprehensive":1,
    "partial":0,
    "legacyPremium":130,
    "product":{
        "productId":2,
        "garage":"true",
        "constructionYear":1990,
        "region":"East",
        "dateOfBirthYoungest":"1983-06-22",
        "objectValue":25000,
        "type":"Car",
        "insuredObject":{
            "name":"Car",
            "ownersName":"Jovana",
            "mileage":300000,
            "engineCapacity":120
        },
        "salesProduct":{
            "salesProductId":3,
            "currency":"EUR",
            "contractStart":"2011-01-01",
            "contractEnd":"2012-01-01"
        },
        "productType":"Car"
    }
},
{
    "elementaryProductId":1,
    "bonusMalus":5,
    "deductible":100,
    "comprehensive":1,
    "partial":0,
    "legacyPremium":75.38,
    "product":{
        "productId":2,
        "garage":"true",
        "constructionYear":2005,
        "region":"East",
        "dateOfBirthYoungest":"1999-06-22",
        "objectValue":30000,
        "type":"Car",
        "insuredObject":{
            "name":"Car",
            "ownersName":"Jelena",
            "mileage":300000,
            "engineCapacity":210
        },
        "salesProduct":{
            "salesProductId":3,
            "currency":"EUR",
            "contractStart":"2013-01-01",
            "contractEnd":"2014-01-01"
        },
        "productType":"Car"
    }
},
{
    "elementaryProductId":1,
    "bonusMalus":-8,
    "deductible":0,
    "comprehensive":1,
    "partial":0,
    "legacyPremium":111,
    "product":{
        "productId":2,
        "garage":"true",
        "constructionYear":1987,
        "region":"East",
        "dateOfBirthYoungest":"1977-09-22",
        "objectValue":4000,
        "type":"Car",
        "insuredObject":{
            "name":"Car",
            "ownersName":"Jelena",
            "mileage":300000,
            "engineCapacity":120
        },
        "salesProduct":{
            "salesProductId":3,
            "currency":"EUR",
            "contractStart":"2012-01-01",
            "contractEnd":"2013-01-01"
        },
        "productType":"Car"
    }
},
{
    "elementaryProductId":1,
    "bonusMalus":0,
    "deductible":0,
    "comprehensive":1,
    "partial":0,
    "legacyPremium":50,
    "product":{
        "productId":2,
        "garage":"true",
        "constructionYear":1999,
        "region":"East",
        "dateOfBirthYoungest":"1942-10-22",
        "objectValue":15000,
        "type":"Car",
        "insuredObject":{
            "name":"Car",
            "ownersName":"Bojana",
            "mileage":300000,
            "engineCapacity":160
        },
        "salesProduct":{
            "salesProductId":3,
            "currency":"DIN",
            "contractStart":"2012-01-01",
            "contractEnd":"2013-01-01"
        },
        "productType":"Car"
    }
},
{
    "elementaryProductId":1,
    "bonusMalus":0,
    "deductible":1000,
    "comprehensive":1,
    "partial":0,
    "legacyPremium":70,
    "product":{
        "productId":2,
        "garage":"false",
        "constructionYear":2011,
        "region":"East",
        "dateOfBirthYoungest":"1967-12-22",
        "objectValue":10000,
        "type":"Car",
        "insuredObject":{
            "name":"Car",
            "ownersName":"Tamara",
            "mileage":55000,
            "engineCapacity":70
        },
        "salesProduct":{
            "salesProductId":3,
            "currency":"EUR",
            "contractStart":"2012-01-01",
            "contractEnd":"2013-01-01"
        },
        "productType":"Car"
    }
},
{
    "elementaryProductId":1,
    "bonusMalus":-15,
    "deductible":1500,
    "comprehensive":1,
    "partial":0,
    "legacyPremium":130,
    "product":{
        "productId":2,
        "garage":"true",
        "constructionYear":1970,
        "region":"West",
        "dateOfBirthYoungest":"1952-06-22",
        "objectValue":35000,
        "type":"Car",
        "insuredObject":{
            "name":"Car",
            "ownersName":"Tijana",
            "mileage":15000,
            "engineCapacity":110
        },
        "salesProduct":{
            "salesProductId":3,
            "currency":"EUR",
            "contractStart":"2011-01-01",
            "contractEnd":"2012-01-01"
        },
        "productType":"Car"
    }
},
{
    "elementaryProductId":1,
    "bonusMalus":-2,
    "deductible":1500,
    "comprehensive":1,
    "partial":0,
    "legacyPremium":120,
    "product":{
        "productId":2,
        "garage":"true",
        "constructionYear":2003,
        "region":"East",
        "dateOfBirthYoungest":"1964-06-22",
        "objectValue":60000,
        "type":"Car",
        "insuredObject":{
            "name":"Car",
            "ownersName":"Dubravka",
            "mileage":300000,
            "engineCapacity":110
        },
        "salesProduct":{
            "salesProductId":3,
            "currency":"EUR",
            "contractStart":"2014-01-01",
            "contractEnd":"2015-01-01"
        },
        "productType":"Car"
    }
},
{
    "elementaryProductId":1,
    "bonusMalus":0,
    "deductible":0,
    "comprehensive":1,
    "partial":0,
    "legacyPremium":130,
    "product":{
        "productId":2,
        "garage":"false",
        "constructionYear":2013,
        "region":"East",
        "dateOfBirthYoungest":"1988-06-12",
        "objectValue":13000,
        "type":"Car",
        "insuredObject":{
            "name":"Car",
            "ownersName":"Tanja",
            "mileage":0,
            "engineCapacity":75
        },
        "salesProduct":{
            "salesProductId":3,
            "currency":"EUR",
            "contractStart":"2013-01-01",
            "contractEnd":"2014-01-01"
        },
        "productType":"Car"
    }
}
]

public class SalesProductClass {
    private int salesProductId;
    private String currency;
    private Date contractStart;
    private Date contractEnd;

    //  getters & setters methods
}

public class InsuredClass {
    private String name;
    private String ownersName;
    private int mileage;
    private int engineCapacity;

    //  getters & setters methods
}

public class ProductClass {
    private int productId;
    private String garage;
    private int constructionYear;
    private String region;
    private Date dateOfBirthYoungest;
    private int objectValue;
    private String type;
    private InsuredClass insuredObject;
    private SalesProductClass salesProduct;
    private String productType;

    //  getters & setters methods
}

public class SomeRootClass {
    private int elementaryProductId;
    private int bonusMalus;
    private int deductible;
    private int comprehensive;
    private int partial;
    private int legacyPremium;
    private ProductClass product;

    //  getters & setters methods
}

<dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.3</version>
</dependency>

Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd").create();

TypeToken<List<SomeRootClass>> token = new TypeToken<List<SomeRootClass>>() {};
List<SomeRootClass> funds = gson.fromJson(jsonData, token.getType());

public String readJsonFile(String fileNamePath) {
    BufferedReader br = null;
    String line = "";
    String data = "";

    try {
        br = new BufferedReader(new FileReader(fileNamePath));
        while ((line = br.readLine()) != null) {
            data += line;
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            if (br != null) {
                br.close();
            }
        } catch (Exception e2) {
            e2.printStackTrace();
        }
    }

    return data;
}