Usually
the json output from “com.google.gson.Gson” prints in compact format like
below.
{"org":[{"name":"Honeywell","yrsOfExperience":2.2},{"name":"IBM","yrsOfExperience":1.8}],"firstName":"Krishna","lastName":"Hari","salary":80000.0}
By
using GsonBuilder class we can print output of JSON like below.
{ "org": [ { "name": "Honeywell", "yrsOfExperience": 2.2 }, { "name": "IBM", "yrsOfExperience": 1.8 } ], "firstName": "Krishna", "lastName": "Hari", "salary": 80000.0 }
To
enable pretty print, create gson object using GsonBuilder class.
Gson
gson = new GsonBuilder().setPrettyPrinting().create();
public class Organization { private String name; private float yrsOfExperience; Organization(String name, float yrsOfExperience){ this.name = name; this.yrsOfExperience = yrsOfExperience; } public String getName() { return name; } public float getYrsOfExperience() { return yrsOfExperience; } public void setName(String name) { this.name = name; } public void setYrsOfExperience(float yrsOfExperience) { this.yrsOfExperience = yrsOfExperience; } }
import java.util.*; public class Employee { private List<Organization> org = new ArrayList<Organization> (); private String firstName; private String lastName; private double salary; Employee(String firstName, String lastName, double salary, List<Organization> org){ this.firstName = firstName; this.lastName = lastName; this.salary = salary; this.org = org; } public String getFirstName() { return firstName; } public String getLastName() { return lastName; } public List<Organization> getOrg() { return org; } public double getSalary() { return salary; } public void setFirstName(String firstName) { this.firstName = firstName; } public void setLastName(String lastName) { this.lastName = lastName; } public void setOrg(List<Organization> org) { this.org = org; } public void setSalary(double salary) { this.salary = salary; } }
import java.util.*; import com.google.gson.Gson; import com.google.gson.GsonBuilder; public class JavaToJSON { public static void main(String args[]){ List<Organization> organizations = new ArrayList<Organization> (); Organization o1 = new Organization("Honeywell", 2.2f); Organization o2 = new Organization("IBM", 1.8f); organizations.add(o1); organizations.add(o2); Employee emp = new Employee("Krishna", "Hari", 80000, organizations); Gson gson = new GsonBuilder().setPrettyPrinting().create(); String json = gson.toJson(emp); System.out.println(json); } }
Output
{ "org": [ { "name": "Honeywell", "yrsOfExperience": 2.2 }, { "name": "IBM", "yrsOfExperience": 1.8 } ], "firstName": "Krishna", "lastName": "Hari", "salary": 80000.0 }
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