import java.io.File; import java.io.IOException; import jxl.SheetSettings; import jxl.Workbook; import jxl.write.WritableSheet; import jxl.write.WritableWorkbook; import jxl.write.WriteException; 
public class TestPassword ...{ 
public static void main(String[] args) throws IOException, WriteException ...{ 
WritableWorkbook wwb = Workbook.createWorkbook(new File("d:/test.xls")); WritableSheet ws = wwb.createSheet("Test Sheet 1", 0); SheetSettings ss = ws.getSettings(); ss.setPassword("12345678"); ss.setProtected(true); wwb.write(); wwb.close(); 
} 
}