在spring boot中使用fieldName返回对象数组

public class User {
    private Long id;
    private String name;
    private Integer age;
    
    // 省略构造方法、getter和setter
}

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;

public class UserService {
    public List<String> getFieldNames(Object object) {
        List<String> fieldNames = new ArrayList<>();
        
        Class<?> clazz = object.getClass();
        Field[] fields = clazz.getDeclaredFields();
        
        for (Field field : fields) {
            fieldNames.add(field.getName());
        }
        
        return fieldNames;
    }
}

@RestController
public class UserController {
    private UserService userService;
    
    @GetMapping("/user/fieldNames")
    public List<String> getUserFieldNames() {
        User user = new User();
        // 设置User对象的属性值
        
        return userService.getFieldNames(user);
    }
}