WebFlux + Mongo 进行项目整合开发

不知不觉，陆陆续续已经写过很多关于 WebFlux 教程了。不来不着急这写这一张的。但是最近有一个网友加了我的微信，反馈信息，问我：“如果进行 WebFlux + Mongo 的整合？”

于是，我就给他写了一个 demo。今天抽个时间，把这个 demo 发出来，希望能够帮助到更多人。

首先，我们可以创建一个 Maven 项目，如：webflux-mongo。

然后，pom.xml 配置文件的内容如下：

<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-webflux</artifactId>
    </dependency>
    <!-- Spring Boot 响应式 MongoDB 依赖 -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-mongodb-reactive</artifactId>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

然后，在 application.yml 配置 Mongo 的连接信息。

#mongodb的配置
spring:
  data:
    mongodb:
      host: 127.0.01
      database: xttblog
      port: 27017
      username: xttblog
      password: xttblog

然后是一个文档类：Xttblog。

public class Xttblog implements Serializable {
    private Long id;
    private String url;
    private String title;
    private String author;
    private String text;
//...省略get/set
}

然后是 XttblogRepository 类。

@Repository
public interface XttblogRepository extends 
ReactiveMongoRepository<Xttblog, Long> {
}

业务 XttblogHandler 类。

@Component
public class XttblogHandler {
    @Autowired
    private XttblogRepository xttblogRepository;
    public Mono<Xttblog> save(Xttblog xttblog) {
        return xttblogRepository.save(xttblog);
    }
    public Flux<Xttblog> findAllXttblog() {
        return xttblogRepository.findAll().cache();
    }
    public Mono<Xttblog> modifyXttblog(Xttblog xttblog) {
        Mono<Xttblog> resultMono = xttblogRepository.save(xttblog);
        return resultMono;
    }
    public Mono<Long> deleteXttblog(Long id) {
        xttblogRepository.deleteById(id);
        return Mono.create(monoSink -> monoSink.success(id));
    }
    public Mono<Xttblog> findXttblogById(Long id) {
        // 从 MongoDB 中获取城市信息
        Mono<Xttblog> xttblogMono = xttblogRepository.findById(id);
        return xttblogMono;
    }
}

最后是 MongoController 类。

public class MongoController {
    @Autowired
    private XttblogHandler xttblogHandler;
    @GetMapping(value = "/{id}")
    public Mono<Xttblog> findXttblogById(@PathVariable("id") Long id) {
        return xttblogHandler.findXttblogById(id);
    }
    @GetMapping()
    public Flux<Xttblog> findAllXttblog() {
        return xttblogHandler.findAllXttblog();
    }
    @PostMapping()
    public Mono<Xttblog> saveXttblog(@RequestBody Xttblog xttblog) {
        return xttblogHandler.save(xttblog);
    }
    @PutMapping()
    public Mono<Xttblog> modifyXttblog(@RequestBody Xttblog city) {
        return xttblogHandler.modifyXttblog(city);
    }
    @DeleteMapping(value = "/{id}")
    public Mono<Long> deleteXttblog(@PathVariable("id") Long id) {
        return xttblogHandler.deleteXttblog(id);
    }
}

运行 MongoAppliction，代码如下：

@SpringBootApplication
public class MongoAppliction {
    public static void main(String[] args) {
        SpringApplication.run(MongoAppliction.class, args);
    }
}

至于，运行效果，我就不贴了。

更多关于 WebFlux 的教程内容，请阅读：WebFlux 教程。

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