In Java, how can we serialize a list of objects using flexjson?
Sep 05, 2023 pm 11:09 PM
Flexjson is a lightweight library for serialization and deserializationJava Objects > and come from JSON format. We can serialize the object list using the serialize() method of the JSONSerializer class. This method can perform shallow serialization on the target instance. We need to pass a list of objects of type List as a parameter to the serialize() method.
Syntax
public String serialize(Object target)
Example
import flexjson.JSONSerializer;
import java.util.*;
public class JsonSerializeListTest {
public static void main(String[] args) {
JSONSerializer serializer = new JSONSerializer().prettyPrint(true); // pretty print JSON
Student s1 = new Student("Raja", "Ramesh", 28, "Hyderabad");
Student s2 = new Student("Suresh", "Kumar", 30, "Chennai");
Student s3 = new Student("Surya", "Krishna", 35, "Pune");
List<Student> students = Arrays.asList(s1, s2, s3);
String jsonStr = serializer.serialize(students);
System.out.println(jsonStr);
}
}
// Student class<strong>
</strong>class Student {
private String firstName;
private String lastName;
private int age;
private String address;
public Student() {}
public Student(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 String getLastName() {
return lastName;
}
public int getAge() {
return age;
}
public String getAddress() {
return address;
}
public String toString() {
return "Student[ " +
"firstName = " + firstName +
", lastName = " + lastName +
", age = " + age +
", address = " + address +
" ]";
}
}Output
[
{
"address": "Hyderabad",
"age": 28,
"class": "Student",
"firstName": "Raja",
"lastName": "Ramesh"
},
{
"address": "Chennai",
"age": 30,
"class": "Student",
"firstName": "Suresh",
"lastName": "Kumar"
},
{
"address": "Pune",
"age": 35,
"class": "Student",
"firstName": "Surya",
"lastName": "Krishna"
}
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