import java.io.*; import java.net.*; import java.util.zip.*; boolean result = true; String basename = "jars-in-archive-root-1.0-SNAPSHOT"; try { File zipFile = new File( basedir, "target/" + basename + "-bin.zip" ); System.out.println( "Checking for existence and file-ishness of: " + zipFile ); if ( !zipFile.exists() || zipFile.isDirectory() ) { System.err.println( "zip file is missing or a directory." ); return false; } System.out.println( "Creating zipFile instance." ); ZipFile zf = new ZipFile( zipFile ); System.out.println( "Looking for project-artifact jar zip entry." ); ZipEntry je = zf.getEntry( basename + "/" + basename + ".jar" ); if ( je == null ) { System.out.println( "project artifact is missing from archive root dir." ); result = false; } } catch( IOException e ) { e.printStackTrace( System.out ); result = false; } return result;