import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.security.GeneralSecurityException;

import org.apache.poi.*;
import org.apache.poi.openxml4j.exceptions.OpenXML4JException;
import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.openxml4j.opc.PackageAccess;
import org.apache.poi.poifs.crypt.*;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.xmlbeans.XmlException;

public class WorkbookProperties {
    public static void main(String[]args) throws IOException, OpenXML4JException, XmlException, GeneralSecurityException {
    	POIFSFileSystem fs = new POIFSFileSystem();
		EncryptionInfo info = new EncryptionInfo(EncryptionMode.agile);
		
		//Encrypt
		Encryptor enc = info.getEncryptor();
		enc.confirmPassword("password");
		
		OPCPackage opc = OPCPackage.open(new File("workbook.xlsx"), PackageAccess.READ_WRITE);
	    POIXMLProperties xmlProps = new POIXMLProperties(opc);
		
		//Add Core Properties
		POIXMLProperties.CoreProperties coreProps = xmlProps.getCoreProperties();
		coreProps.setCreator("Test");
		
		//Add Custom Properties
		POIXMLProperties.CustomProperties custProp = xmlProps.getCustomProperties();
		custProp.addProperty("Author", "Test");
        custProp.addProperty("Year", 2017);
        custProp.addProperty("Price", 45.50);
        custProp.addProperty("Available", true);
		
		OutputStream os = enc.getDataStream(fs);
		opc.save(os);
		opc.close();
		
		FileOutputStream fos = new FileOutputStream("workbook.xlsx");
		fs.writeFilesystem(fos);
		fos.close();
	}
}