org.apache.poi.xssf.streaming.examples.SavePasswordProtectedXlsx Maven / Gradle / Ivy
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package org.apache.poi.xssf.streaming.examples;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.GeneralSecurityException;
import org.apache.poi.examples.util.TempFileUtils;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.poifs.crypt.EncryptionInfo;
import org.apache.poi.poifs.crypt.EncryptionMode;
import org.apache.poi.poifs.crypt.Encryptor;
import org.apache.poi.poifs.crypt.temp.EncryptedTempData;
import org.apache.poi.poifs.crypt.temp.SXSSFWorkbookWithCustomZipEntrySource;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.util.IOUtils;
import org.apache.poi.xssf.streaming.SXSSFCell;
import org.apache.poi.xssf.streaming.SXSSFRow;
import org.apache.poi.xssf.streaming.SXSSFSheet;
/**
* An example that outputs a simple generated workbook that is password protected.
* The example highlights how to do this in streaming way.
*
* - The example demonstrates that all temp files are removed.
*
SXSSFWorkbookWithCustomZipEntrySource extends SXSSFWorkbook to ensure temp files are encrypted.
*
*/
public class SavePasswordProtectedXlsx {
public static void main(String[] args) throws Exception {
if(args.length != 2) {
throw new IllegalArgumentException("Expected 2 params: filename and password");
}
TempFileUtils.checkTempFiles();
String filename = args[0];
String password = args[1];
SXSSFWorkbookWithCustomZipEntrySource wb = new SXSSFWorkbookWithCustomZipEntrySource();
try {
for(int i = 0; i < 10; i++) {
SXSSFSheet sheet = wb.createSheet("Sheet" + i);
for(int r = 0; r < 1000; r++) {
SXSSFRow row = sheet.createRow(r);
for(int c = 0; c < 100; c++) {
SXSSFCell cell = row.createCell(c);
cell.setCellValue("abcd");
}
}
}
EncryptedTempData tempData = new EncryptedTempData();
try {
wb.write(tempData.getOutputStream());
save(tempData.getInputStream(), filename, password);
System.out.println("Saved " + filename);
} finally {
tempData.dispose();
}
} finally {
wb.close();
wb.dispose();
}
TempFileUtils.checkTempFiles();
}
public static void save(final InputStream inputStream, final String filename, final String pwd)
throws InvalidFormatException, IOException, GeneralSecurityException {
POIFSFileSystem fs = null;
FileOutputStream fos = null;
OPCPackage opc = null;
try {
fs = new POIFSFileSystem();
EncryptionInfo info = new EncryptionInfo(EncryptionMode.agile);
Encryptor enc = Encryptor.getInstance(info);
enc.confirmPassword(pwd);
opc = OPCPackage.open(inputStream);
fos = new FileOutputStream(filename);
opc.save(enc.getDataStream(fs));
fs.writeFilesystem(fos);
} finally {
IOUtils.closeQuietly(fos);
IOUtils.closeQuietly(opc);
IOUtils.closeQuietly(fs);
IOUtils.closeQuietly(inputStream);
}
}
}