带有springdata配置的Mongo db

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

spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017
spring.data.mongodb.database=mydb

@Document(collection = "users")
public class User {
    @Id
    private String id;
    private String name;
    private int age;
    // getters and setters
}

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

@Service
public class UserService {
    @Autowired
    private UserRepository userRepository;

    public List<User> getUsersByName(String name) {
        return userRepository.findByName(name);
    }

    public void saveUser(User user) {
        userRepository.save(user);
    }
}