Java将Map转换为实体类

import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;
public class User {
    private String name;
    private int age;
    // getters and setters
    public static User fromMap(Map<String, Object> map) throws IllegalAccessException {
        User user = new User();
        Field[] fields = User.class.getDeclaredFields();
        for (Field field : fields) {
            field.setAccessible(true);
            if (map.containsKey(field.getName())) {
                field.set(user, map.get(field.getName()));
            }
        }
        return user;
    }
}

// 使用示例
Map<String, Object> map = new HashMap<>();
map.put("name", "John Doe");
map.put("age", 30);
User user = User.fromMap(map);

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
public class User {
    private String name;
    private int age;
    // getters and setters
}

// 使用示例
Map<String, Object> map = new HashMap<>();
map.put("name", "John Doe");
map.put("age", 30);
User user = JSON.toJavaObject(new JSONObject(map), User.class);