<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20210307</version>
</dependency>
import org.json.JSONArray;
import org.json.JSONObject;
String jsonString = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";
JSONObject jsonObject = new JSONObject(jsonString);
String name = jsonObject.getString("name");
int age = jsonObject.getInt("age");
String city = jsonObject.getString("city");
System.out.println("Name: " + name);
System.out.println("Age: " + age);
System.out.println("City: " + city);
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.12.0</version>
</dependency>
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
String jsonString = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";
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);
import org.json.JSONObject;
JSONObject jsonObject = new JSONObject();
jsonObject.put("name", "John");
jsonObject.put("age", 30);
jsonObject.put("city", "New York");
String jsonString = jsonObject.toString();
System.out.println(jsonString);
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
ObjectMapper objectMapper = new ObjectMapper();
ObjectNode objectNode = objectMapper.createObjectNode();
objectNode.put("name", "John");
objectNode.put("age", 30);
objectNode.put("city", "New York");
String jsonString = objectMapper.writeValueAsString(objectNode);
System.out.println(jsonString);
