Spring boot与vaadin run jetty，即使我使用tomcat

Question

我尝试在Vaadin 7.7.0中使用Spring boot。默认情况下，如果我没有指定，spring boot会使用tomcat。然而，我发现有如下日志：

2016-08-26 12:08:49.897  INFO 3240 --- [           main] e.j.JettyEmbeddedServletContainerFactory : Server initialized with port: 8080
2016-08-26 12:08:49.900  INFO 3240 --- [           main] org.eclipse.jetty.server.Server          : jetty-8.y.z-SNAPSHOT

我通过eclipse检查依赖项，发现没有码头。

下面是该问题的依赖关系

怎么会有这么强的版本呢？

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-configuration-processor</artifactId>
    <optional>true</optional>
</dependency>
<dependency>
    <groupId>com.vaadin</groupId>
    <artifactId>vaadin-spring-boot-starter</artifactId>
    <version>1.0.0</version>
</dependency>
<dependency>
    <groupId>com.vaadin</groupId>
    <artifactId>vaadin-client</artifactId>
</dependency>
<dependency>
    <groupId>com.vaadin</groupId>
    <artifactId>vaadin-client-compiler</artifactId>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>com.vaadin</groupId>
    <artifactId>vaadin-push</artifactId>
</dependency>

通过删除检查后，我发现错误的码头来自

<dependency>
    <groupId>com.vaadin</groupId>
    <artifactId>vaadin-client-compiler</artifactId>
    <scope>provided</scope>
</dependency>

移除后可以添加

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <scope>provided</scope>
</dependency>

一切都很好。

我不知道这个包裹是怎么回事。是否存在依赖冲突？

Answer 1

Jetty用于Vaadin的推送功能，已经包含在内。