Stephen Davies schrieb am 08.10.2016 um 02:57:
I will have to regenerate that code to get the exact error message text but it basically said that the parameter substitution was invalid.
A follow-up question.
Once the bytea column is populated, how best to display the content in a web page?
I have :
byte [] imgB;
ResultSet rs = st1.executeQuery("select pic from part where pno='" + p + "'");
if(rs.next()){
imgB = rs.getBytes(1);
if (imgB != null){
out.write("Content-type: image/jpeg");
out.write("Content-length: " + (int)imgB.length);
out.write(imgB.toString());
}
}
but this does not work.
The toString() looks wrong but removing it makes the write fail.
Assuming you are doing this in a Servlet, you should be writing the binary data to the HttpServletResponse
Something like:
ResultSet rs = st1.executeQuery("select pic from part where pno='" + p + "'");
if (rs.next())
{
byte[] image = rs.getBytes(1);
response.setContentType("image/jpeg");
response.setIntHeader("Content-length", (int)image.length);
response.getOutputStream().write(image);
}
But this is getting quite off-topic now.
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