I am using QTJambi and I need to convert BufferedImage into QPixmap.
I have found a solution:
public QPixmap convertBufferedImageToQPixmap(BufferedImage img){
QPixmap result = new QPixmap(new QSize(img.getWidth(),img.getHeight()));
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
boolean foundWriter = ImageIO.write(img, "jpg", baos);
result.loadFromData(baos.toByteArray());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return result;
}
Related
JavaSE: Exception is "com.google.zxing.NotFoundException"
Can any one help me?
The version is 3.4.1
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.3.1</version>
</dependency>
and the java code is there.
BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Result result;
Map<DecodeHintType,Object> hints = new LinkedHashMap<>();
hints.put(DecodeHintType.CHARACTER_SET, "utf-8");
hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);
result = new MultiFormatReader().decode(bitmap, hints);
return result.getText();
The Exception info is :
com.google.zxing.NotFoundException
There is not anything other displayed...
But the following code can not be decoded out，It's really weird
Almost identical QR codes, one can be decoded but the other cannot be coded`
Use GenericMultipleBarcodeReader to read the QR code.
public void decodefile(String filename) {
// Read an image to BufferedImage
BufferedImage image = null;
try {
image = ImageIO.read(new File(filename));
} catch (IOException e) {
System.out.println(e);
return;
}
// ZXing
BinaryBitmap bitmap = null;
int[] pixels = image.getRGB(0, 0, image.getWidth(), image.getHeight(), null, 0, image.getWidth());
RGBLuminanceSource source = new RGBLuminanceSource(image.getWidth(), image.getHeight(), pixels);
bitmap = new BinaryBitmap(new HybridBinarizer(source));
MultiFormatReader reader = new MultiFormatReader();
GenericMultipleBarcodeReader multiReader = new GenericMultipleBarcodeReader(reader);
try {
Result[] zxingResults = multiReader.decodeMultiple(bitmap);
System.out.println("ZXing result count: " + zxingResults.length);
if (zxingResults != null) {
for (Result zxingResult : zxingResults) {
System.out.println("Format: " + zxingResult.getBarcodeFormat());
System.out.println("Text: " + zxingResult.getText());
System.out.println();
}
}
} catch (NotFoundException e) {
e.printStackTrace();
}
pixels = null;
bitmap = null;
if (image != null) {
image.flush();
image = null;
}
}
Here is my results:
ZXing result count: 1
Format: QR_CODE
Text: https://mp-daily.bookln.cn/q?c=1201M9XUEDE
I am trying to write/read files in JavaFX while using the Gluon plugin, and I am not having any luck. If i run the program as a Desktop App, it works fine, I've even used the same functions in Android IDE and it works fine, however if I send the program to my phone with Gluon, it does not work. I wanting to know how to save/read to files in Gluon, and what have I done wrong, and why does it work as Desktop and on Android but not Gluon. The two fcns I used are:
public void writeToFile() {
try {
FileOutputStream f = new FileOutputStream("Meal1_Protein.txt");
f.write(choice.getBytes()); //Choice is input from a dropdown
f.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Toast toast = new Toast(choice);
toast.show();
}
public void readFromFile(){
try {
FileInputStream f = new FileInputStream("Meal1_Protein.txt");
InputStreamReader is = new InputStreamReader(f);
BufferedReader br = new BufferedReader(is);
StringBuffer buff = new StringBuffer();
String lines;
while((lines = br.readLine())!=null){
buff.append(lines);
buff.append("\n");
}
carbInput.setText(buff.toString()); // inserting into a txtfield
//to see if it I can read strings back in.
Toast toast = new Toast(buff.toString());
toast.show();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
Hi I am trying to create a method to be used in the TextArea setText method for javafx.
I am trying to get a method that does this:
public static void setTextArea(String fileName) {
String line;
try {
FileReader fileReader = new FileReader(fileName);
BufferedReader buffer = new BufferedReader(fileReader);
while ((line = buffer.readLine()) != null) {
out.println(line);
}
buffer.close();
} catch //etc etc
but I can't use it in the setText method because it is a void method.
Can anyone help translate this method so it could work in the TextArea setText method?
-Thanks!
You just pring out the lines to System.out I guess. You have to add up the content of the text file by doing something like this
public static void setTextArea(String fileName) {
String line;
String content;
try {
FileReader fileReader = new FileReader(fileName);
BufferedReader buffer = new BufferedReader(fileReader);
while ((line = buffer.readLine()) != null) {
out.println(line);
content += line;
}
buffer.close();
} catch //etc etc
Then you can either return content or call setText(content) from the TextArea class. If it's a big file, then using StringBuilder would probably be a better idea instead of concatenating each line.
You will have to get the data from the file and and set the data to textArea..
TextArea txtArea = new TextArea();
String data = getDataForTextArea(String fileLocation);
txtArea.setText(data);
public String getDataForTextArea(String fileLocation) {
InputStream inputStream = new FileInputStream(fileLocation);
if (inputStream != null) {
int b;
String txtData = "";
try {
while ((b = inputStream.read()) != -1) {
txtData += (char) b;
}
} catch (IOException e) {
e.printStackTrace();
} finally {
inputStream.close();
}
return txtData;
}
Make sure to check for nullpointerException.
Here is my code which reads excelsheet files.but i can see my other functions are working fine but when try to get resource as url it return null.
URL resource = null;
try {
System.out.println(file3);
resource = getServletContext().getResource(file3);
System.out.println("Problem with getting resource"+resource);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
File file = null;
try {
System.out.println(resource.toURI());
file = new File(resource.toURI());
} catch (URISyntaxException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
FileInputStream input = null;
try {
input = new FileInputStream(file);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Workbook w;
w = Workbook.getWorkbook(input);
// Get the first sheet
Sheet sheet = w.getSheet(0);
return sheet;
I've recently tried to encrypt Saml2 assertion using relaying-party service public key. Unfortunately I can't finalise even the test phase
here is my code
public class EncryptionTest {
public static void main(String args[]){
try {
// The Assertion to be encrypted
FileInputStream fis;
DataInputStream in, in2;
File f = new File("src/main/resources/AssertionTest");
byte[] buffer = new byte[(int) f.length()];
in = new DataInputStream(new FileInputStream(f));
in.readFully(buffer);
in.close();
//Assertion = DataInputStream.readUTF(in);
String in_assert = new String(buffer);
System.out.println(in_assert);
org.apache.axiom.om.OMElement OMElementAssertion = org.apache.axiom.om.util.AXIOMUtil.stringToOM(in_assert);
Assertion assertion = convertOMElementToAssertion2(OMElementAssertion);
// Assume this contains a recipient's RSA public key
Credential keyEncryptionCredential;
keyEncryptionCredential = getCredentialFromFilePath("src/main/resources/cert.pem");
EncryptionParameters encParams = new EncryptionParameters();
encParams.setAlgorithm(EncryptionConstants.ALGO_ID_BLOCKCIPHER_AES128);
KeyEncryptionParameters kekParams = new KeyEncryptionParameters();
kekParams.setEncryptionCredential(keyEncryptionCredential);
kekParams.setAlgorithm(EncryptionConstants.ALGO_ID_KEYTRANSPORT_RSAOAEP);
KeyInfoGeneratorFactory kigf =
Configuration.getGlobalSecurityConfiguration()
.getKeyInfoGeneratorManager().getDefaultManager()
.getFactory(keyEncryptionCredential);
kekParams.setKeyInfoGenerator(kigf.newInstance());
Encrypter samlEncrypter = new Encrypter(encParams, kekParams);
samlEncrypter.setKeyPlacement(KeyPlacement.PEER);
EncryptedAssertion encryptedAssertion = samlEncrypter.encrypt(assertion);
System.out.println(encryptedAssertion);
} catch (EncryptionException e) {
e.printStackTrace();
} catch (CertificateException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (KeyException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (XMLStreamException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
}
public static Credential getCredentialFromFilePath(String certPath) throws IOException, CertificateException, KeyException {
InputStream inStream = new FileInputStream(certPath);
CertificateFactory cf = CertificateFactory.getInstance("X.509");
Certificate cert = cf.generateCertificate(inStream);
inStream.close();
//"Show yourself!"
System.out.println(cert.toString());
BasicX509Credential cred = new BasicX509Credential();
cred.setEntityCertificate((java.security.cert.X509Certificate) cert);
cred.setPrivateKey(null);
//System.out.println(cred.toString());
return cred;
//return (Credential) org.opensaml.xml.security.SecurityHelper.getSimpleCredential( (X509Certificate) cert, privatekey);
}
public static Assertion convertOMElementToAssertion2(OMElement element) {
Element assertionSAMLDOOM = (Element) new StAXOMBuilder(DOOMAbstractFactory.getOMFactory(), element.getXMLStreamReader()).getDocumentElement();
try {
UnmarshallerFactory unmarshallerFactory = Configuration.getUnmarshallerFactory();
Unmarshaller unmarshaller = unmarshallerFactory.getUnmarshaller(Assertion.DEFAULT_ELEMENT_NAME);
return (Assertion) unmarshaller.unmarshall(assertionSAMLDOOM);
} catch (Exception e1) {
System.out.println("error: " + e1.toString());
}
return null;
}
}
I constantly recive Null pointer exception in
KeyInfoGeneratorFactory kigf =
Configuration.getGlobalSecurityConfiguration()
.getKeyInfoGeneratorManager().getDefaultManager()
.getFactory(keyEncryptionCredential);
kekParams.setKeyInfoGenerator(kigf.newInstance());
How can I set GlobalSecurityConfiguration or is there different approach of encrypting Assertion which will work?
This question was laying open for too long. The problem was initialization of OpenSaml.
Simple
DefaultBootstrap.bootstrap();
helped and solved problem.