Converting pojo class object data into Json format

step1: create pojo class with required fileds

step2: set the data using setter methods in main class

step3:add jakson library

step4: add the following code in main class and pass ur pojo object here


ObjectWriter writer = new ObjectMapper().writer().withDefaultPrettyPrinter();
String json = writer.writeValueAsString(user);
System.out.println(json);



Ex:

user.java

class User
{
private String uid;
private String Uname;

//getters and setters
}

Main 

class Main
{
psvm(S a[])
{
User user=new User();

r.setUid(''111");
r.setUname("sss");

ObjectWriter writer = new ObjectMapper().writer().withDefaultPrettyPrinter();
String json = writer.writeValueAsString(user);
System.out.println(json);

}
}
Output:

user
{
"uid":"111",
"uname":"sss"
}