将嵌套属性键的Map<String、String>转换为POJO

import java.util.HashMap;
import java.util.Map;

public class MapToPOJOConverter {
    public static void main(String[] args) {
        Map<String, String> nestedMap = new HashMap<>();
        nestedMap.put("person.name", "John");
        nestedMap.put("person.age", "30");
        nestedMap.put("person.address.city", "New York");
        nestedMap.put("person.address.zip", "12345");

        Person person = convertMapToPOJO(nestedMap);
        System.out.println(person.getName()); // 输出：John
        System.out.println(person.getAge()); // 输出：30
        System.out.println(person.getAddress().getCity()); // 输出：New York
        System.out.println(person.getAddress().getZip()); // 输出：12345
    }

    public static Person convertMapToPOJO(Map<String, String> nestedMap) {
        Person person = new Person();
        for (Map.Entry<String, String> entry : nestedMap.entrySet()) {
            String[] keys = entry.getKey().split("\\.");
            Map<String, Object> currentObject = person;
            for (int i = 0; i < keys.length - 1; i++) {
                if (!currentObject.containsKey(keys[i])) {
                    currentObject.put(keys[i], new HashMap<String, Object>());
                }
                currentObject = (Map<String, Object>) currentObject.get(keys[i]);
            }
            currentObject.put(keys[keys.length - 1], entry.getValue());
        }
        return person;
    }
}

class Person {
    private String name;
    private int age;
    private Address address;

    // 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;
    }

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }
}

class Address {
    private String city;
    private String zip;

    // Getters and setters

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    public String getZip() {
        return zip;
    }

    public void setZip(String zip) {
        this.zip = zip;
    }
}