Java報錯：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>8080</port>
                    </httpConnector>
                </configuration>
            </plugin>