更換SpringBoot中默認的web容器為jetty

在pom文件中：
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifact>spring-boot-starter-web</artifact>
    <exclusions>
       <exclusion>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-tomcat</artifactId>
       </exclusion>
    </exclusions>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jetty</artifactId>
</dependency>