使用Jackson将JSON字符串或对象反序列化为字符串字段

<!-- Maven -->
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.12.5</version>
</dependency>

// Gradle
implementation 'com.fasterxml.jackson.core:jackson-databind:2.12.5'

{
  "name": "John Doe"
}

public class Person {
    private String name;

    // Getter and Setter methods
    // ...
}

{
  "name": "John Doe"
}

import com.fasterxml.jackson.databind.ObjectMapper;

public class Main {
    public static void main(String[] args) {
        String json = "{\"name\":\"John Doe\"}";

        try {
            ObjectMapper objectMapper = new ObjectMapper();
            Person person = objectMapper.readValue(json, Person.class);

            System.out.println(person.getName()); // Output: John Doe
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

public class Main {
    public static void main(String[] args) {
        String json = "{\"name\":\"John Doe\"}";

        try {
            ObjectMapper objectMapper = new ObjectMapper();
            JsonNode jsonNode = objectMapper.readTree(json);

            String name = jsonNode.get("name").asText();
            System.out.println(name); // Output: John Doe
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}