Skip to content

How to Convert JSON to a Java Object

If you need to convert JSON to a Java Object, then you can do one of the following:

Option 1 – Using Gson

import com.google.gson.Gson; public class SimpleTesting { public static void main(String[] args) throws InterruptedException { String json = """ { "firstName" : "Jane", "lastName" : "Doe", "dateOfBirth" : "1973-04-29", "address" : "81 Hype", "city" : "New York", "contact" : "0123456789" } """; Student data = new Gson().fromJson(json, Student.class); System.out.println(data.getFirstName()); System.out.println(data.getLastName()); System.out.println(data.getCity()); } } class Student { private String firstName; private String lastName; private String dateOfBirth; private String address; private String city; private String contact; public String getFirstName() { return firstName; } public void setFirstName(String firstName) { this.firstName = firstName; } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName; } public String getDateOfBirth() { return dateOfBirth; } public void setDateOfBirth(String dateOfBirth) { this.dateOfBirth = dateOfBirth; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String getCity() { return city; } public void setCity(String city) { this.city = city; } public String getContact() { return contact; } public void setContact(String contact) { this.contact = contact; } }
Code language: Java (java)

Option 2 – Using Jackson

import java.io.File; import java.io.IOException; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.SerializationFeature; public class SimpleTesting { public static void main(String[] args) throws InterruptedException { ObjectMapper mapper = new ObjectMapper(); mapper.enable(SerializationFeature.INDENT_OUTPUT); try { Student student = mapper.readValue(new File("json-file.json"), Student.class); System.out.println("First Name: "+student.getFirstName()); System.out.println("Last Name: "+student.getLastName()); System.out.println("City: "+student.getCity()); System.out.println("Address: "+student.getAddress()); System.out.println("Contact: "+student.getContact()); System.out.println("Date of Birth: "+student.getDateOfBirth()); } catch(IOException e) { e.printStackTrace(); } } } class Student { private String firstName; private String lastName; private String dateOfBirth; private String address; private String city; private String contact; public String getFirstName() { return firstName; } public void setFirstName(String firstName) { this.firstName = firstName; } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName; } public String getDateOfBirth() { return dateOfBirth; } public void setDateOfBirth(String dateOfBirth) { this.dateOfBirth = dateOfBirth; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String getCity() { return city; } public void setCity(String city) { this.city = city; } public String getContact() { return contact; } public void setContact(String contact) { this.contact = contact; } }
Code language: Java (java)

See also  Solving Single Word Pig Latin in Java
Tags:
Subscribe
Notify of
guest
0 Comments
Inline Feedbacks
View all comments
0
Would love your thoughts, please comment.x
()
x