How to read XML file whith invalid character

Question

During development of the project in which it is necessary to encrypt the data read from the XML file, and then write to another file and decrypt it. The problem is that when reading the encrypted file, XML service symbols appear which are not read and give an error. The question is how do I read data from a file? Encryption Algorithms Listing of code where I read file try { File file = new File(filePath); DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory .newInstance(); DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder(); Document document = documentBuilder.parse(file); password = document.getElementsByTagName("KeyWord").item(0).getTextContent(); encDataAES = document.getElementsByTagName("AES").item(0).getTextContent(); encDataRSA = document.getElementsByTagName("RSA").item(0).getTextContent(); } catch (Exception e) { System.out.println("Error reading configuration file:"); System.out.println(e.getMessage()); }