上小节我们实现了第一个SpringMVC的小例子，部署到Tomcat服务器测试运行。实际开发中，更常用到jetty服务器，本节我们实现把上节例子部署到jetty服务器测试运行。

项目结构图如下：

实现步骤：

1.创建一个maven 模块。 maven项目必须安装jetty插件，在才能把项目跑在jetty服务器上。 在pom.xml中引入以下依赖,并且安装jetty插件。

<?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>

    <groupId>com.simoniu</groupId>
    <artifactId>springmvcdemo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>springmvcdemo Maven Webapp</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <spring.version>5.2.5.RELEASE</spring.version>
        <servlet-version>4.0.1</servlet-version>
        <junit.version>4.12</junit.version>
        <lombok.version>1.18.12</lombok.version>
    </properties>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
            <scope>test</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>${servlet-version}</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
            <scope>provided</scope>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <!-- 此处的 1.8 指的是 JDK 的版本，目前一般为 1.7 或 1.8 -->
                    <target>1.8</target>
                </configuration>
            </plugin>
            <!--servlet容器 jetty插件-->
            <plugin>
                <groupId>org.eclipse.jetty</groupId>
                <artifactId>jetty-maven-plugin</artifactId>
                <version>9.4.18.v20190429</version>
                <configuration>
                    <webApp>
                        <!--项目的上下文配置-->
                        <contextPath>/springmvctest</contextPath>
                    </webApp>
                    <!--项目的端口号和服务器配置-->
                    <httpConnector>
                        <port>8888</port>
                        <host>localhost</host>
                    </httpConnector>
                    <scanIntervalSeconds>1</scanIntervalSeconds>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

2至5步与上节完全相同(略过)

6.在maven视图，选中Plugins->jetty->jetty:run. 如下图：

如果启动异常，可以尝试先执行Plugins->clean->clean:clean

出现下图，说明jetty服务器启动成功！

7.测试HelloController. 在地址栏输入：http://localhost:8888/springmvctest/helloworld