Failed to execute goal org.eclipse.jetty:jetty-maven-plugin:9.4.26.v20200117:run (default-cli) on project ssm-mybatis-plus: Failure

修改一下端口就好了，不要用80端口。

<plugin>
          <groupId>org.eclipse.jetty</groupId>
          <!--嵌入式Jetty的Maven插件-->
          <artifactId>jetty-maven-plugin</artifactId>
          <version>9.4.26.v20200117</version>
          <configuration>
            <!--應用啟動后加載webapp網頁與資源-->
            <webAppSourceDirectory>src/main/webapp</webAppSourceDirectory>
            <httpConnector>
              <!--應用端口號,默認8080端口-->
              <port>8089</port>
            </httpConnector>
          </configuration>
</plugin>