import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
public class JsonParser {
public static void main(String[] args) {
String jsonString = "{\"name\":\"John\",\"age\":30,\"city\":\"New York\"}";
try {
ObjectMapper objectMapper = new ObjectMapper();
JsonNode jsonNode = objectMapper.readTree(jsonString);
String name = jsonNode.get("name").asText();
int age = jsonNode.get("age").asInt();
String city = jsonNode.get("city").asText();
System.out.println("Name: " + name);
System.out.println("Age: " + age);
System.out.println("City: " + city);
} catch (Exception e) {
e.printStackTrace();
}
}
}
import com.google.gson.Gson;
public class JsonParser {
public static void main(String[] args) {
String jsonString = "{\"name\":\"John\",\"age\":30,\"city\":\"New York\"}";
try {
Gson gson = new Gson();
Person person = gson.fromJson(jsonString, Person.class);
System.out.println("Name: " + person.getName());
System.out.println("Age: " + person.getAge());
System.out.println("City: " + person.getCity());
} catch (Exception e) {
e.printStackTrace();
}
}
}
class Person {
private String name;
private int age;
private String city;
// Getters and setters
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
}
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
public class JsonGenerator {
public static void main(String[] args) {
try {
ObjectMapper objectMapper = new ObjectMapper();
ObjectNode jsonNode = objectMapper.createObjectNode();
jsonNode.put("name", "John");
jsonNode.put("age", 30);
jsonNode.put("city", "New York");
String jsonString = objectMapper.writeValueAsString(jsonNode);
System.out.println(jsonString);
} catch (Exception e) {
e.printStackTrace();
}
}
}
import com.google.gson.Gson;
public class JsonGenerator {
public static void main(String[] args) {
try {
Gson gson = new Gson();
Person person = new Person();
person.setName("John");
person.setAge(30);
person.setCity("New York");
String jsonString = gson.toJson(person);
System.out.println(jsonString);
} catch (Exception e) {
e.printStackTrace();
}
}
}
