# 10.2.2 添加 Reactor 依赖

让我们开始使用 Reactor 吧，把一下依赖添加到项目构建中：

```markup
<dependency>
    <groupId>io.projectreactor</groupId>
    <artifactId>reactor-core</artifactId>
</dependency>
```

Reactor 还提供了测试支持。你会写在你的 Reactor 代码周围写很多的测试，所以你肯定会想把这个依赖添加到项目构建中：

```markup
<dependency>
    <groupId>io.projectreactor</groupId>
    <artifactId>reactor-test</artifactId>
    <scope>test</scope>
</dependency>
```

我假定你要向 Spring Boot 项目中添加这些依赖，它可以为你处理的依赖管理，所以没有必要指定依赖的 \<version> 元素。但是如果你想在非 Spring Boot 项目中使用 Reactor，那么你需要在构建中设置 Reactor 的 BOM（物料清单）。下面的依赖管理条目增加了 Reactor 的 Bismuth-RELEASE 到构建中：

```markup
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>io.projectreactor</groupId>
            <artifactId>reactor-bom</artifactId>
            <version>Bismuth-RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>
```

现在，Reactor 在你的项目构建中了，可以使用 Mono 和 Flux 开始创建响应式管道了。对于本章的其余部分，我们将使用 Mono 和 Flux 提供的一些操作。


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