此 demo 主要演示了 Spring Boot 如何集成 MongoDB，使用官方的 starter 实现增删改查。
作者编写本demo时，MongoDB 最新版本为 4.1，使用 docker 运行，下面是所有步骤：
- 下载镜像：
docker pull mongo:4.1 - 运行容器：
docker run -d -p 27017:27017 -v /Users/yangkai.shen/docker/mongo/data:/data/db --name mongo-4.1 mongo:4.1 - 停止容器：
docker stop mongo-4.1 - 启动容器：
docker start mongo-4.1
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>spring-boot-demo-mongodb</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>spring-boot-demo-mongodb</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>com.xkcoding</groupId>
<artifactId>spring-boot-demo</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
</dependencies>
<build>
<finalName>spring-boot-demo-mongodb</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>spring:
data:
mongodb:
host: localhost
port: 27017
database: article_db
logging:
level:
org.springframework.data.mongodb.core: debug/**
* <p>
* 文章实体类
* </p>
*
* @author yangkai.shen
* @date Created in 2018-12-28 16:21
*/
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Article {
/**
* 文章id
*/
@Id
private Long id;
/**
* 文章标题
*/
private String title;
/**
* 文章内容
*/
private String content;
/**
* 创建时间
*/
private Date createTime;
/**
* 更新时间
*/
private Date updateTime;
/**
* 点赞数量
*/
private Long thumbUp;
/**
* 访客数量
*/
private Long visits;
}/**
* <p>
* 文章 Dao
* </p>
*
* @author yangkai.shen
* @date Created in 2018-12-28 16:30
*/
public interface ArticleRepository extends MongoRepository<Article, Long> {
/**
* 根据标题模糊查询
*
* @param title 标题
* @return 满足条件的文章列表
*/
List<Article> findByTitleLike(String title);
}/**
* <p>
* 测试操作 MongoDb
* </p>
*
* @author yangkai.shen
* @date Created in 2018-12-28 16:35
*/
@Slf4j
public class ArticleRepositoryTest extends SpringBootDemoMongodbApplicationTests {
@Autowired
private ArticleRepository articleRepo;
@Autowired
private MongoTemplate mongoTemplate;
@Autowired
private Snowflake snowflake;
/**
* 测试新增
*/
@Test
public void testSave() {
Article article = new Article(1L, RandomUtil.randomString(20), RandomUtil.randomString(150), DateUtil.date(), DateUtil
.date(), 0L, 0L);
articleRepo.save(article);
log.info("【article】= {}", JSONUtil.toJsonStr(article));
}
/**
* 测试新增列表
*/
@Test
public void testSaveList() {
List<Article> articles = Lists.newArrayList();
for (int i = 0; i < 10; i++) {
articles.add(new Article(snowflake.nextId(), RandomUtil.randomString(20), RandomUtil.randomString(150), DateUtil
.date(), DateUtil.date(), 0L, 0L));
}
articleRepo.saveAll(articles);
log.info("【articles】= {}", JSONUtil.toJsonStr(articles.stream()
.map(Article::getId)
.collect(Collectors.toList())));
}
/**
* 测试更新
*/
@Test
public void testUpdate() {
articleRepo.findById(1L).ifPresent(article -> {
article.setTitle(article.getTitle() + "更新之后的标题");
article.setUpdateTime(DateUtil.date());
articleRepo.save(article);
log.info("【article】= {}", JSONUtil.toJsonStr(article));
});
}
/**
* 测试删除
*/
@Test
public void testDelete() {
// 根据主键删除
articleRepo.deleteById(1L);
// 全部删除
articleRepo.deleteAll();
}
/**
* 测试点赞数、访客数，使用save方式更新点赞、访客
*/
@Test
public void testThumbUp() {
articleRepo.findById(1L).ifPresent(article -> {
article.setThumbUp(article.getThumbUp() + 1);
article.setVisits(article.getVisits() + 1);
articleRepo.save(article);
log.info("【标题】= {}【点赞数】= {}【访客数】= {}", article.getTitle(), article.getThumbUp(), article.getVisits());
});
}
/**
* 测试点赞数、访客数，使用更优雅/高效的方式更新点赞、访客
*/
@Test
public void testThumbUp2() {
Query query = new Query();
query.addCriteria(Criteria.where("_id").is(1L));
Update update = new Update();
update.inc("thumbUp", 1L);
update.inc("visits", 1L);
mongoTemplate.updateFirst(query, update, "article");
articleRepo.findById(1L)
.ifPresent(article -> log.info("【标题】= {}【点赞数】= {}【访客数】= {}", article.getTitle(), article.getThumbUp(), article
.getVisits()));
}
/**
* 测试分页排序查询
*/
@Test
public void testQuery() {
Sort sort = Sort.by("thumbUp", "updateTime").descending();
PageRequest pageRequest = PageRequest.of(0, 5, sort);
Page<Article> all = articleRepo.findAll(pageRequest);
log.info("【总页数】= {}", all.getTotalPages());
log.info("【总条数】= {}", all.getTotalElements());
log.info("【当前页数据】= {}", JSONUtil.toJsonStr(all.getContent()
.stream()
.map(article -> "文章标题：" + article.getTitle() + "点赞数：" + article.getThumbUp() + "更新时间：" + article.getUpdateTime())
.collect(Collectors.toList())));
}
/**
* 测试根据标题模糊查询
*/
@Test
public void testFindByTitleLike() {
List<Article> articles = articleRepo.findByTitleLike("更新");
log.info("【articles】= {}", JSONUtil.toJsonStr(articles));
}
}- Spring Data MongoDB 官方文档：https://docs.spring.io/spring-data/mongodb/docs/2.1.2.RELEASE/reference/html/
- MongoDB 官方镜像地址：https://hub.docker.com/_/mongo
- MongoDB 官方快速入门：https://docs.mongodb.com/manual/tutorial/getting-started/
- MongoDB 官方文档：https://docs.mongodb.com/manual/