Apache Commons IO library does not have any class that provide json serialization/deserialization functionality, the libraries that you can use for this purpose are Jackson, Gson, and other libraries that provide JSON serialization/deserialization functionality.

The JsonCreator annotation is provided by the Jackson library, which is used to indicate that a constructor or factory method should be used to deserialize a JSON object to a Java object. Here's an example of how you can use the JsonCreator annotation to deserialize a JSON object to a Java object:

class Person {
    private String name;
    private int age;

    @JsonCreator
    public Person(@JsonProperty("name") String name, @JsonProperty("age") int age) {
        this.name = name;
        this.age = age;
    }

    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;
    }
}

In this example, the constructor is annotated with @JsonCreator, which tells the Jackson library to use this constructor to deserialize a JSON object to a Person object. The constructor's parameters are also annotated with @JsonProperty, which tells the Jackson library to use the values of the "name" and "age" properties in the JSON object to initialize the corresponding fields in the Person object.

Keep in mind that you need to have the Jackson library in your classpath in order to use this example.