<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.7</version>
</dependency>
import com.google.gson.Gson;
public class JsonParser {
public static void main(String[] args) {
String json = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";
Gson gson = new Gson();
Person person = gson.fromJson(json, Person.class);
System.out.println("Name: " + person.getName());
System.out.println("Age: " + person.getAge());
System.out.println("City: " + person.getCity());
}
}
class Person {
private String name;
private int age;
private String city;
// getters and setters
// ...
}
Gson gson = new Gson();
Person person = new Person("John", 30, "New York");
String json = gson.toJson(person);
System.out.println(json);
{"name":"John","age":30,"city":"New York"}
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.12.3</version>
</dependency>
import com.fasterxml.jackson.databind.ObjectMapper;
public class JsonParser {
public static void main(String[] args) {
String json = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";
ObjectMapper objectMapper = new ObjectMapper();
try {
Person person = objectMapper.readValue(json, Person.class);
System.out.println("Name: " + person.getName());
System.out.println("Age: " + person.getAge());
System.out.println("City: " + person.getCity());
} catch (IOException e) {
e.printStackTrace();
}
}
}
class Person {
private String name;
private int age;
private String city;
// getters and setters
// ...
}
ObjectMapper objectMapper = new ObjectMapper();
Person person = new Person("John", 30, "New York");
try {
String json = objectMapper.writeValueAsString(person);
System.out.println(json);
} catch (JsonProcessingException e) {
e.printStackTrace();
}
{"name":"John","age":30,"city":"New York"}
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.75</version>
</dependency>
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
public class JsonParser {
public static void main(String[] args) {
String json = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";
JSONObject jsonObject = JSON.parseObject(json);
String name = jsonObject.getString("name");
int age = jsonObject.getInteger("age");
String city = jsonObject.getString("city");
System.out.println("Name: " + name);
System.out.println("Age: " + age);
System.out.println("City: " + city);
}
}
Person person = new Person("John", 30, "New York");
String json = JSON.toJSONString(person);
System.out.println(json);
{"name":"John","age":30,"city":"New York"}
