json使用jackson将变量解析为pojo，该变量是一个或两个对象

public class Person {
    private String name;
    private int age;

    // Getters and Setters
    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;
    }
}

import com.fasterxml.jackson.databind.ObjectMapper;

public class JsonToPojoExample {
    public static void main(String[] args) {
        String jsonString = "{\"name\":\"John\", \"age\":30}";

        ObjectMapper objectMapper = new ObjectMapper();
        try {
            Person person = objectMapper.readValue(jsonString, Person.class);
            System.out.println("Name: " + person.getName());
            System.out.println("Age: " + person.getAge());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import com.fasterxml.jackson.annotation.JsonProperty;

public class Person {
    @JsonProperty("full_name")
    private String name;
    private int age;

    // Getters and Setters
}

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;

import java.io.IOException;

public class Person {
    @JsonDeserialize(using = CustomNameDeserializer.class)
    private String name;
    private int age;

    // Getters and Setters
}

class CustomNameDeserializer extends JsonDeserializer<String> {
    @Override
    public String deserialize(JsonParser p, DeserializationContext ctxt) throws IOException, JsonProcessingException {
        return p.getText().replace("_", " ");
    }
}