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How to convert the JSON object to a bean using JSON-lib API in Java?
The JSONObject class is a collection of name/value pairs (unordered) where the bean is a class with setter and getter methods for its member fields. We can convert a JSON object to a bean using the toBean() method of JSONObject class.
Syntax
public static Object toBean(JSONObject jsonObject, Class beanClass)
Example
import net.sf.json.JSONObject;
public class ConvertJSONObjToBeanTest {
public static void main(String[] args) {
mployee emp = new Employee("Sai", "Ram", 30, "Bangalore");
JSONObject jsonObj = JSONObject.fromObject(emp);
System.out.println(jsonObj.toString(3)); // pretty print JSON
emp = (Employee)JSONObject.toBean(jsonObj, Employee.class);
System.out.println(emp.toString());
}
// Employee class
public static class Employee {
private String firstName, lastName, address;
private int age;
public Employee() {
}
public Employee(String firstName, String lastName, int age, String address) {
super();
this.firstName = firstName;
this.lastName = lastName;
this.age = age;
this.address = address;
}
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 int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String toString() {
return "Employee[ " +
"firstName = " + firstName +
", lastName = " + lastName +
", age = " + age +
", address = " + address +
" ]";
}
}
}Output
{
"firstName": "Sai",
"lastName": "Ram",
"address": "Bangalore",
"age": 30
}
Employee[ firstName = Sai, lastName = Ram, age = 30, address = Bangalore ]
Updated on: 08-Jul-2020
3K+ Views
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