Example usage for org.apache.poi.poifs.crypt EncryptionMode standard

Introduction

In this page you can find the example usage for org.apache.poi.poifs.crypt EncryptionMode standard.

Prototype

EncryptionMode standard

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Usage

From source file:de.jlo.talendcomp.excel.SpreadsheetFile.java

License:Apache License

private static void encryptFile(String inFilePath, String outFilePath, String password) throws Exception {
    if (password == null || password.trim().isEmpty()) {
        throw new Exception("Password cannot be null or empty!");
    }/*  ww  w .  j  a v a2  s .co  m*/
    if (inFilePath == null || inFilePath.trim().isEmpty()) {
        throw new Exception("Input file cannot be null or empty!");
    }
    File inFile = new File(inFilePath);
    if (outFilePath == null || outFilePath.trim().isEmpty()) {
        throw new Exception("Output file cannot be null or empty!");
    }
    File outFile = new File(outFilePath);
    if (inFile.exists() == false) {
        throw new Exception("Excel file to encrypt: " + inFile.getAbsolutePath() + " does not exists!");
    }
    ensureDirExists(outFile);
    POIFSFileSystem fs = new POIFSFileSystem();
    EncryptionInfo info = new EncryptionInfo(EncryptionMode.standard);
    Encryptor enc = info.getEncryptor();
    enc.confirmPassword(password);
    OPCPackage opc = OPCPackage.open(inFile, PackageAccess.READ_WRITE);
    OutputStream os = enc.getDataStream(fs);
    opc.save(os);
    opc.close();
    FileOutputStream fos = null;
    Exception ex = null;
    try {
        fos = new FileOutputStream(outFile);
        fs.writeFilesystem(fos);
    } catch (Exception e) {
        ex = e;
    } finally {
        if (fos != null) {
            try {
                fos.close();
            } catch (Exception e1) {
                // ignore
            }
        }
    }
    if (ex != null) {
        throw ex;
    }
}

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