This question already has answers here:
How to provide a file download from a JSF backing bean?
(5 answers)
Base64 String to byte[] in java [duplicate]
(1 answer)
Closed 11 months ago.
Im working with java 6, jsf and icefaces.
In the database I have stored a Base64 string that is a pdf, I want to put a button in the screen to download that pdf.
I tried with the ice:outputResource component passing the bytes of the Base64 but it didnt worked.
Is there a way to achieve this?
Thanks
Related
This question already has answers here:
How to display an image in jsp?
(2 answers)
Closed 7 years ago.
I am stored an image in postgres sql as bytea[] field.That is in byte format.I want to view the perfect image into my jsp page after storing the image.Please, point me to the solution or some ways to achieve this requirement.
Covert your image to Base64:
String imageBase64 = new String(Base64.getEncoder().encode(imageByteArray))
Note that Base64 class is coming from java.util package. If you not using JDK 8 you can easily find an alternative to do that.
Then in your JSP page:
<img src="data:image/png;base64,${imageBase64}" />
This question already has answers here:
How to retrieve and display images from a database in a JSP page?
(6 answers)
Closed 7 years ago.
What method should I use to retrieve and display my image which is store in mysql with the datatype longblob. As for string I simply use
(Example: rs.getString("foodname"))
but waht is the datatype to use for the image as I declare it as object in java class. So should i use ?
rs.getObject("image")
Thank you
Basically you need to get it as blob and convert this binary data to image see this example
This question already has answers here:
iText 5 header and footer
(2 answers)
Closed 9 years ago.
I'm generating PDF's with the iText java lib, how can I add a static container to the bottom of my page? I want to use it for a signature, it must be on every page if there are more than one page, always it the bottom left corner?
Kind Regards
Use PdfPageEventHelper.onEndPage() to add content to every page, as described in this example.
This question already has answers here:
Java OCR implementation [closed]
(5 answers)
Closed 9 years ago.
Hey guys is it possible to read text from an image, like how you go to submit a form and it ask you to fill in the text inside image. I want to know if it is possible to read the text inside it. If so, what language?
David Biga
EDIT:
I am not trying to read captcha I was just giving an example of an image with text in it.
It is possible to read text with Optical Character Recognition.
However, CAPTCHAs are designed to thwart this, in order to distinguish humans from computers.
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Java : How to determine the correct charset encoding of a stream
i'm trying to read an ANSI text file in java but, i don't know the encoding of the text inside , is there any way to detect the encoding of text file before getting it using FileInputStream ?
I don't think it's possible to know the encoding of a text file before actually reading it. You have to read a couple of bytes before trying to determine it's encoding.
The tool mentioned in the comments asks you to do exactly that (actually it says several thousands bytes) before detecting the encoding of a file.