pom.xml中
将下面配置信息中<configuration></configuration>里面的东西删掉
<build>
<finalName>onlineSale</finalName>
<plugins>
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>9.4.5.v20170502</version>
<configuration>
<scanIntervalSeconds>10</scanIntervalSeconds>
<httpConnector>