java 对excel加密_java poi对Excel文件加密

@SuppressWarnings("deprecation")

@Override

public InputStream exportItemProjectExcel(List ITEM_PROJECT_ID_LIST) throws Exception {

FileInputStream inputStream = new FileInputStream(new File(this.getClass().getResource("/../../resource/分项工程.xlsx").getFile()));

Workbook workbook = WorkbookFactory.create(inputStream);

Sheet sheet = workbook.getSheetAt(0);// 读取第-页

Row row;

for (int i = 0; i < ITEM_PROJECT_ID_LIST.size(); i++) {

row = sheet.createRow(i);

row.createCell(0).setCellValue((String) ITEM_PROJECT_ID_LIST.get(i));

}

ByteArrayOutputStream baos = new ByteArrayOutputStream();

workbook.write(baos);// 临时存储流到内存

baos.flush();

ByteArrayInputStream workbookInput = new ByteArrayInputStream(baos.toByteArray());

// 创建POIFS文件系统 加密文件

POIFSFileSystem fs = new POIFSFileSystem();

EncryptionInfo info = new EncryptionInfo(fs, EncryptionMode.agile);

Encryptor enc = info.getEncryptor();

enc.confirmPassword("itemProject");

// 然后把字节输入到输入流，然后输入到OPC包里面

OPCPackage opc = OPCPackage.open(workbookInput);

OutputStream os = enc.getDataStream(fs);

opc.save(os);

opc.close();

baos = new ByteArrayOutputStream();

fs.writeFilesystem(baos);

baos.flush();

inputStream.close();

workbook.close();

baos.close();

return new ByteArrayInputStream(baos.toByteArray());

}