How does Java handle JSON serialization and deserializa…

In Java, you can utilize the Jackson library to handle the serialization and deserialization of JSON. Here’s a simple example:

Firstly, you need to add the dependency for Jackson in Maven or Gradle.

Maven is a powerful tool used in software development.

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.12.3</version>
</dependency>

Gradle is a build automation tool.

implementation 'com.fasterxml.jackson.core:jackson-databind:2.12.3'

Next, you can use the following code to serialize Java objects into a JSON string:

import com.fasterxml.jackson.databind.ObjectMapper;

public class JsonSerializationExample {
    public static void main(String[] args) throws Exception {
        // 创建一个Java对象
        Person person = new Person("John", 25);

        // 创建ObjectMapper对象
        ObjectMapper objectMapper = new ObjectMapper();

        // 将Java对象序列化为JSON字符串
        String jsonString = objectMapper.writeValueAsString(person);

        // 打印JSON字符串
        System.out.println(jsonString);
    }
}

The above code will output the following JSON string:

{"name":"John","age":25}

Next, you can use the following code to deserialize a JSON string into a Java object:

import com.fasterxml.jackson.databind.ObjectMapper;

public class JsonDeserializationExample {
    public static void main(String[] args) throws Exception {
        // JSON字符串
        String jsonString = "{\"name\":\"John\",\"age\":25}";

        // 创建ObjectMapper对象
        ObjectMapper objectMapper = new ObjectMapper();

        // 将JSON字符串反序列化为Java对象
        Person person = objectMapper.readValue(jsonString, Person.class);

        // 打印Java对象的属性
        System.out.println(person.getName());
        System.out.println(person.getAge());
    }
}

The code above will output the following content:

John
25

It is important to note that when deserializing, you need to provide the type of the target Java class (in this example, Person.class).