spring.data.mongodb.database=springmongo
spring.data.mongodb.username=springmongo
spring.data.mongodb.password=springmongo
spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017
# 以下方式也可以,可以根據(jù)喜好來(lái)配置
# spring.data.mongodb.uri=mongodb://springmongo:springmongo@localhost:27017/springmongo

import lombok.Data;
import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;
/**
 * @author 公-眾-號(hào)：程序員阿牛
 * @Id是Spring的注解，注意不要和Mybatis的搞混
 * @Document是MongoDB的注解
 */
@Data
@Document
public class UserInfo {
    @Id
    private String userId;
    private String userName;
    private Integer age;
    private String address;
}

/**
 * @author 公-眾-號(hào)：程序員阿牛
 */
public interface UserInfoDAO {

    public UserInfo save(UserInfo userInfo);

    public UserInfo getUser(String userId);
}

/**
 * @author 公-眾-號(hào)：程序員阿牛
 */
@Repository
public class UserInfoDaoImpl implements UserInfoDAO {
    @Autowired
    private MongoTemplate mongoTemplate;

    @Override
    public UserInfo save(UserInfo userInfo) {
        return mongoTemplate.save(userInfo);
    }

    @Override
    public UserInfo getUser(String userId) {
        UserInfo userInfo = mongoTemplate.findOne(Query.query(Criteria.where("userId").is(userId)),UserInfo.class);
        return userInfo;
    }
}

/**
 * @author 公-眾-號(hào)：程序員阿牛
 */
@RestController
public class UserInfoController {
    @Autowired
    private UserInfoDAO userInfoDAO;
    @RequestMapping("/getUser/{userId}")
    public UserInfo getUserInfo(@PathVariable("userId")String userId){
        return userInfoDAO.getUser(userId);
    }

    @PostMapping("/addUser")
    public UserInfo addUserInfo(@RequestBody UserInfo userInfo){
        return userInfoDAO.save(userInfo);
    }

}

/**
 * @author 公-眾-號(hào)：程序員阿牛
 * 這里使用的spring-data抽象的Repository接口，有興趣的可以自己去研究一下    
 */
@Repository
public interface UserInfoRepository extends MongoRepository<UserInfo, String> {
}

/**
 * @author 公-眾-號(hào)：程序員阿牛
 */
@RestController
public class UserInfo2Controller {
    @Autowired
    private UserInfoRepository userInfoRepository;
    @RequestMapping("/getUser2/{userId}")
    public Optional<UserInfo> getUserInfo(@PathVariable("userId")String userId){
        return userInfoRepository.findById(userId);
    }

    @PostMapping("/addUser2")
    public UserInfo addUserInfo(@RequestBody UserInfo userInfo){
        return userInfoRepository.save(userInfo);
    }

}