Maven Project error: No goals have been specified for this build. You must specify a valid lifecycle phase or a

In the MAVEN project, the startup service times had the following exceptions:

No goals have been specified for this build. Must specify a valid lifecycle phase or a goal in the format <plugin-prefix>:<goal> or <plugin-group-id >:<plugin-artifact-id>[:<plugin-version>]:<goal>. Available lifecycle Phases Are:validate, initialize,

The reason for this is that there was a problem compiling the Tomcat plug-in. The following code gives an error message:

<build>
		<!--configuration plugin-->
		<plugins>
			<plugin>
				<groupId> org.apache.tomcat.maven</groupid>
				<artifactId>tomcat7-maven-plugin</artifactId>
				< Configuration>
					<!--Portal Service port number-->
					<port>8082</port>
					<path>/</path>
				</configuration>
			</plugin>
		</plugins>
	</build>  

Workaround: The MAVEN plugin installed by Eclipse is m2eclipse, and the console uses commands mvn compile does not complain.

Need to modify the Pom.xml file, add <defaultGoal>compile</defaultGoal> to the <build> tag.

The modified code looks like this:

<build>
		<defaultGoal>compile</defaultGoal>
		<!--configuration plugin-->
		<plugins>
			<plugin>
				<groupId>org.apache.tomcat.maven</groupId>
				<artifactId> tomcat7-maven-plugin</artifactid>
				<configuration>
					<!--Portal Service port number-->
					<port> 8082</port>
					<path>/</path>
				</configuration>
			</plugin>
		</ Plugins>
	</build>