MongoDB快速入门及其SpringBoot实战

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class UserService {

    @Autowired
    private MongoTemplate mongoTemplate;

    public void createUser(User user) {
        mongoTemplate.save(user, "users");
    }

    public List<User> getAllUsers() {
        return mongoTemplate.findAll(User.class, "users");
    }

    public User getUserById(String id) {
        Query query = new Query(Criteria.where("id").is(id));
        return mongoTemplate.findOne(query, User.class, "users");
    }

    public void updateUser(User user) {
        Query query = new Query(Criteria.where("id").is(user.getId()));
        mongoTemplate.upsert(query, user, "users");
    }

    public void deleteUserById(String id) {
        Query query = new Query(Criteria.where("id").is(id));
        mongoTemplate.remove(query, User.class, "users");
    }
}