使用spring-data特性更新spring-boot应用程序的mongodb中的特定字段

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>

import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;

@Document(collection = "users")
public class User {
    @Id
    private String id;
    private String name;
    private int age;
    // 其他字段...

    // 省略构造函数、getter和setter方法
}

import org.springframework.data.mongodb.repository.MongoRepository;

public interface UserRepository extends MongoRepository<User, String> {
    User findByName(String name);
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserService {
    private final UserRepository userRepository;

    @Autowired
    public UserService(UserRepository userRepository) {
        this.userRepository = userRepository;
    }

    public void updateUserName(String id, String newName) {
        User user = userRepository.findById(id).orElse(null);
        if (user != null) {
            user.setName(newName);
            userRepository.save(user);
        }
    }
}