During the recent development came to a scenario where I want to convert the JSON string into the java object (POJO). to achieve this i decided to use the "gson" API provided by the google. Following the is example how i have converted the JSON to POJO.
External API : gson-1.3.jar from google.
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
public class JsonToPojo {
/**
* @param args
*/
public static void main(String[] args) {
String jsonString= "[{name:'Yogesh',address : 'Pimple Saudagar',age:29},
{name:'Puneet',address :'Hadapsar',age:27}, {name:'Sameer',address:'Wagholi',age:31}]";
Student [] students = getJsonFormString(jsonString, Student[].class);
for (Student student : students) {
System.out.println("Name --> " + student.getName());
System.out.println("Address --> " + student.getAddress());
System.out.println("Age --> " + student.getAge());
}
}
/**
* Returns the JSON representation from string.
*
* @param <T>
* @param json
* @param type
*
*/
public static <T> T getJsonFormString(String json, Class<T> type) {
GsonBuilder gsonBuilder = new GsonBuilder();
gsonBuilder.serializeNulls();
Gson gson = gsonBuilder.create();
return (T) gson.fromJson(json, type);
}
}
class Student {
private String name;
private String address;
private int age;
/**
* Constructor
*/
public Student (){
}
/**
* @return the name
*/
public String getName() {
return name;
}
/**
* @param name the name to set
*/
public void setName(String name) {
this.name = name;
}
/**
* @return the address
*/
public String getAddress() {
return address;
}
/**
* @param address the address to set
*/
public void setAddress(String address) {
this.address = address;
}
/**
* @return the age
*/
public int getAge() {
return age;
}
/**
* @param age the age to set
*/
public void setAge(int age) {
this.age = age;
}
}
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