import org.apache.maven.shared.release.versions.DefaultVersionInfo; //导入依赖的package包/类
@Override
protected String getNewVersion() throws MojoExecutionException, VersionParseException {
    VersionInfo versionInfo = new DefaultVersionInfo(getOldVersion());

    if (!addSnapshot && versionInfo.isSnapshot())
    {
        return versionInfo.getReleaseVersionString();
    }
    else if (addSnapshot && !versionInfo.isSnapshot())
    {
        return versionInfo.getSnapshotVersionString();
    } else {
        String message = addSnapshot ?
                "Trying to add -SNAPSHOT to version that already contains it (" + getOldVersion() + ")"
                :"Trying to remove -SNAPSHOT from version that does not contain it (" + getOldVersion() + ")";
        throw new MojoExecutionException(message);
    }
}
 

import org.apache.maven.shared.release.versions.DefaultVersionInfo; //导入依赖的package包/类
/**
    * Increment the version number.
    * 
    * @param version
    * @return
    * @throws VersionParseException 
    */
   private String incrementVersion( String version ) throws VersionParseException {
   	VersionInfo versionInfo = new DefaultVersionInfo(version);
   	
   	if (versionInfo.isSnapshot())
   	{
   		return versionInfo.getNextVersion().getSnapshotVersionString();
   	}
   	else
   	{
   		return versionInfo.getNextVersion().getReleaseVersionString();
   	}
}