As a part of End to End REST Assured Tutorial , in this post We will learn to create a simple POJO class for a simple JSON Array payload. In previous post we have learnt about How to create POJO classes of a JSON Object Payload.
If you are not aware of JSON Array then please refer Introduction to JSON here.
We will take similar JSON object payload as previous post but this time it will be multiple JSON Objects in a JSON Array.
Sample JSON Array Payload
[ { "firstName": "Amod", "lastName": "Mahajan", "gender": "Male", "age": 28, "salary": 10000.56, "married": false }, { "firstName": "Animesh", "lastName": "Prashant", "gender": "Male", "age": 30, "salary": 20000.56, "married": true }, { "firstName": "Kitty", "lastName": "Gupta", "gender": "Female", "age": 26, "salary": 30000.56, "married": false } ]
Above JSON Array is a collection of JSON Objects or a List of Employees. We have created a Employee POJO class in previous post and we can reuse the same. That is how reusability is one of the major advantage of POJO classes.
Employee POJO
package RestfulBookerPojo; public class Employee { // private variables or data members of pojo class private String firstName; private String lastName; private String gender; private int age; private double salary; private boolean married; // Getter and setter methods 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 getGender() { return gender; } public void setGender(String gender) { this.gender = gender; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public double getSalary() { return salary; } public void setSalary(double salary) { this.salary = salary; } public boolean getMarried() { return married; } public void setMarried(boolean married) { this.married = married; } }
We do not need any other classes. We just need to create a List of Employees . Below code snippets shows how can we convert a Java Object in to a JSON Array and vice versa.
package RestfulBookerPojo; import java.util.ArrayList; import java.util.List; import org.testng.annotations.Test; import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.core.type.TypeReference; import com.fasterxml.jackson.databind.ObjectMapper; public class ListOfEmployeesSerializationDeserialization { public String allEmployeeJson; @Test public void createListOfEmployeesJSONArrayFromEmployeePOJOClass() throws JsonProcessingException { // Create first employee Employee amod = new Employee(); amod.setFirstName("Amod"); amod.setLastName("Mahajan"); amod.setAge(29); amod.setGender("Male"); amod.setSalary(10000.56); amod.setMarried(false); // Create second employee Employee animesh = new Employee(); animesh.setFirstName("Animesh"); animesh.setLastName("Prashant"); animesh.setAge(30); animesh.setGender("Male"); animesh.setSalary(20000.56); animesh.setMarried(true); // Create third employee Employee kitty = new Employee(); kitty.setFirstName("Kitty"); kitty.setLastName("Gupta"); kitty.setAge(27); kitty.setGender("Female"); kitty.setSalary(30000.56); kitty.setMarried(false); // Creating a List of Employees ListallEMployees = new ArrayList (); allEMployees.add(amod); allEMployees.add(animesh); allEMployees.add(kitty); // Converting a Java class object to a JSON Array payload as string ObjectMapper objectMapper = new ObjectMapper(); allEmployeeJson = objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(allEMployees); System.out.println(allEmployeeJson); } @Test public void getPojoFromEmployeeObject() throws JsonProcessingException { // Converting EMployee json Array string to Employee class object ObjectMapper objectMapper = new ObjectMapper(); List allEmploeesDetails = objectMapper.readValue(allEmployeeJson, new TypeReference >() { }); for (Employee emp : allEmploeesDetails) { System.out.println("========================================================"); System.out.println("First Name of employee : " + emp.getFirstName()); System.out.println("Last Name of employee : " + emp.getLastName()); System.out.println("Age of employee : " + emp.getAge()); System.out.println("Gender of employee : " + emp.getGender()); System.out.println("Salary of employee : " + emp.getSalary()); System.out.println("Marital status of employee : " + emp.getMarried()); System.out.println("========================================================"); } } }
Output
[ { "firstName" : "Amod", "lastName" : "Mahajan", "gender" : "Male", "age" : 29, "salary" : 10000.56, "married" : false }, { "firstName" : "Animesh", "lastName" : "Prashant", "gender" : "Male", "age" : 30, "salary" : 20000.56, "married" : true }, { "firstName" : "Kitty", "lastName" : "Gupta", "gender" : "Female", "age" : 27, "salary" : 30000.56, "married" : false } ] ======================================================== First Name of employee : Amod Last Name of employee : Mahajan Age of employee : 29 Gender of employee : Male Salary of employee : 10000.56 Marital status of employee : false ======================================================== ======================================================== First Name of employee : Animesh Last Name of employee : Prashant Age of employee : 30 Gender of employee : Male Salary of employee : 20000.56 Marital status of employee : true ======================================================== ======================================================== First Name of employee : Kitty Last Name of employee : Gupta Age of employee : 27 Gender of employee : Female Salary of employee : 30000.56 Marital status of employee : false ========================================================
You can download/clone above sample project from here.
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That was super easy and printing is a new thing. Thanks for making it simple