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[英]How to check a cell text is strikethrough or not in .xlsx file using apache poi
[英]How to check if xlsx file is password protected or not using apache poi
如何檢查xlsx文件是否受密碼保護。 我們可以檢查xls文件如下
FileInputStream fin = new FileInputStream(new File("C:/Book1.xls"));
POIFSFileSystem poifs = new POIFSFileSystem(fin);
EncryptionInfo info = new EncryptionInfo(poifs);
Decryptor d = Decryptor.getInstance(info);
try {
if (!d.verifyPassword(Decryptor.DEFAULT_PASSWORD)) {
throw new RuntimeException("Unable to process: document is encrypted");
}
InputStream dataStream = d.getDataStream(poifs);
HSSFWorkbook wb = new HSSFWorkbook(dataStream);
// parse dataStream
} catch (GeneralSecurityException ex) {
throw new RuntimeException("Unable to process encrypted document", ex);
}
但上面的代碼只適用於xls而不適用於xlsx。
如果你不知道你擁有什么,但你知道密碼,那么你應該使用WorkbookFactory.create並將密碼傳遞給它,例如
Workbook wb = WorkbookFactory.create(new File("protected.xls"),
"NiceSecurePassword");
WorkbookFactory
將識別該類型,然后為您調用適當的解密和工作簿加載。 如果文件未受保護,則將忽略密碼
。
如果您確定該文件是基於.xlsx
的,但不確定它是否受到保護,那么您可以執行以下操作:
Workbook wb = null;
try {
wb = new XSSFWorkbook(new File("test.xlsx"));
} catch (EncryptedDocumentException e) {
// Password protected, try to decrypt and load
}
如果你給XSSFWorkbook一個受密碼保護的.xlsx
文件,它會拋出一個EncryptedDocumentException你可以捕獲然后根據你已經獲得的代碼嘗試解密
嘗試使用
XSSFWorkbook wb = new XSSFWorkbook(dataStream);
來自Apache POI:“HSSF是POI項目的Excel '97(-2007)文件格式的純Java實現.XSSF是POI項目的Excel 2007 OOXML(.xlsx)文件格式的純Java實現。” http://poi.apache.org/spreadsheet/您正在XLSX文件上使用HSSF(適用於xls)。
第一,
public boolean isEncrypted(String path) {
try {
try {
new POIFSFileSystem(new FileInputStream(path));
} catch (IOException ex) {
}
System.out.println("protected");
return true;
} catch (OfficeXmlFileException e) {
System.out.println("not protected");
return false;
}
}
然后,
if (isEncrypted(sourcepath)) {
org.apache.poi.hssf.record.crypto.Biff8EncryptionKey.setCurrentUserPassword("1234");
POIFSFileSystem filesystem = new POIFSFileSystem(new FileInputStream(inpFn));
EncryptionInfo info = new EncryptionInfo(filesystem);
Decryptor d = Decryptor.getInstance(info);
if (!d.verifyPassword("1234")) {
System.out.println("Not good");
} else {
System.out.println("Good!");
}
in = d.getDataStream(filesystem);
} else {
in = new FileInputStream(inpFn);
}
try {
XSSFWorkbook wbIn = new XSSFWorkbook(in);
.
.
.
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