给一个 JSONObject.toJavaObject() 的例子

假设有一个 JSON 字符串如下：

{
  "name": "Alice",
  "age": 25,
  "isMarried": false,
  "hobbies": ["reading", "travelling"]
}

我们可以使用 JSONObject.parseObject() 方法将其转换为 JSONObject 对象，然后使用 JSONObject.toJavaObject() 方法将其转换为 Java 对象，如下所示：

import com.alibaba.fastjson.JSONObject;

public class JsonToJavaExample {
    public static void main(String[] args) {
        String jsonString = "{\"name\":\"Alice\",\"age\":25,\"isMarried\":false,\"hobbies\":[\"reading\",\"travelling\"]}";
        JSONObject jsonObject = JSONObject.parseObject(jsonString);
        Person person = jsonObject.toJavaObject(Person.class);
        System.out.println(person.getName());
        System.out.println(person.getAge());
        System.out.println(person.isMarried());
        System.out.println(person.getHobbies()[0]);
        System.out.println(person.getHobbies()[1]);
    }
}

class Person {
    private String name;
    private int age;
    private boolean isMarried;
    private String[] hobbies;

    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;
    }

    public boolean isMarried() {
        return isMarried;
    }

    public void setMarried(boolean married) {
        isMarried = married;
    }

    public String[] getHobbies() {
        return hobbies;
    }

    public void setHobbies(String[] hobbies) {
        this.hobbies = hobbies;
    }
}

输出结果如下：

Alice
25
false
reading
travelling

可以看到，我们成功将 JSON 字符串转换为了 Java 对象。