1、先对pom项目进行install：
RunAs->maven install，如果出现如下错误：
Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:3.0.0:jar (attach-javadocs) on project zhgl: Execution attach-javadocs of goal org.apache.maven.plugins:maven-javadoc-plugin:3.0.0:jar failed: Unable to load the mojo 'jar' in the plugin 'org.apache.maven.plugins:maven-javadoc-plugin:3.0.0' due to an API incompatibility: org.codehaus.plexus.component.repository.exception.ComponentLookupException: org/apache/maven/plugins/javadoc/JavadocJar : Unsupported major.minor version 51.0
说明当前的项目的jdk要1.7版本，可以如下解决：
RunAs->maven build...
成功后，下一步。
2、RunAs->maven build...
