| /* |
| * ==================================================================== |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * ==================================================================== |
| */ |
| |
| package org.apache.poi.examples.xssf.eventusermodel; |
| |
| import java.io.InputStream; |
| |
| import org.apache.poi.examples.xssf.usermodel.LoadPasswordProtectedXlsx; |
| import org.apache.poi.openxml4j.opc.OPCPackage; |
| import org.apache.poi.poifs.crypt.temp.AesZipFileZipEntrySource; |
| import org.apache.poi.xssf.eventusermodel.XSSFReader; |
| import org.apache.poi.xssf.eventusermodel.XSSFReader.SheetIterator; |
| |
| /** |
| * An example that loads a password protected workbook and counts the sheets. |
| * The example highlights how to do this in streaming way. |
| * <p><ul> |
| * <li>The example demonstrates that all temp files are removed. |
| * <li><code>AesZipFileZipEntrySource</code> is used to ensure that temp files are encrypted. |
| * </ul><p> |
| */ |
| @SuppressWarnings({"java:S106","java:S4823","java:S1192"}) |
| public final class LoadPasswordProtectedXlsxStreaming { |
| |
| private LoadPasswordProtectedXlsxStreaming() {} |
| |
| public static void main(String[] args) throws Exception { |
| LoadPasswordProtectedXlsx.execute(args, LoadPasswordProtectedXlsxStreaming::printSheetCount); |
| } |
| |
| private static void printSheetCount(final InputStream inputStream) throws Exception { |
| try (AesZipFileZipEntrySource source = AesZipFileZipEntrySource.createZipEntrySource(inputStream); |
| OPCPackage pkg = OPCPackage.open(source)) { |
| XSSFReader reader = new XSSFReader(pkg); |
| SheetIterator iter = (SheetIterator)reader.getSheetsData(); |
| int count = 0; |
| while(iter.hasNext()) { |
| iter.next(); |
| count++; |
| } |
| System.out.println("sheet count: " + count); |
| } |
| } |
| } |