Convert Java Object to Json String using GSON
JSON Stand for JavaScript Object Notation. It’s a standard text-based format which shows structured data based on JavaScript object syntax. It is commonly used for transmitting data in web applications. JSON is highly recommended to transmit data between a server and web application. To convert a Java object into JSON, the following methods can be used:
- GSON: It is an open-source Java library which is used to serialize and deserialize Java objects to JSON.
- Jackson API
In this article, Java object is converted into the JSON using GSON: The steps to do this are as follows:
- Add jar files of Jackson (in case of Maven project add Gson dependencies in the pom.xml file)
html
< dependency >
< groupId >com.google.code.gson</ groupId >
< artifactId >gson</ artifactId >
< version >2.6.2</ version >
</ dependency >
|
Below is the screenshot showing this step:-
- Create a POJO (Plain Old Java Object) to be converted into JSON
Java
package GeeksforGeeks.Geeks;
public class Organisation {
private String organisation_name;
private String description;
private int Employees;
public String getOrganisation_name()
{
return organisation_name;
}
public void setOrganisation_name(String organisation_name)
{
this .organisation_name = organisation_name;
}
public String getDescription()
{
return description;
}
public void setDescription(String description)
{
this .description = description;
}
public int getEmployees()
{
return Employees;
}
public void setEmployees( int employees)
{
Employees = employees;
}
@Override
public String toString()
{
return "Organisation [organisation_name="
+ organisation_name
+ ", description="
+ description
+ ", Employees="
+ Employees + "]";
}
}
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Below is the screenshot showing this step:-
- Create a Java class for converting the Organisation object into JSON.
Java
package GeeksforGeeks.Geeks;
import com.google.gson.Gson;
public class ObjectToJson {
public static void main(String[] a)
{
Organisation org = new Organisation();
/** Insert the data into the object **/
org = getObjectData(org);
System.out.println("Json representation"
+ " of Object organisation is ");
System.out.println( new Gson().toJson(org));
}
public static Organisation getObjectData(Organisation org)
{
/**insert the data**/
org.setOrganisation_name("GeeksforGeeks");
org.setDescription("A computer Science portal for Geeks");
org.setEmployees( 2000 );
/**Return Object**/
return org;
}
}
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Below is the screenshot showing this step:-
- Execute the process
- Output Json
Output
{
"organisation_name" : "GeeksforGeeks",
"description" : "A computer Science portal for Geeks",
"Employee" : "2000"
}
Below is the screenshot showing Output on Console:
Last Updated :
09 Jan, 2023
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