How to pass image byte in servlets

[bernouli]

i come up with this


This is my getters and setters in a java class.

private byte[] picture;
 
public Goal() {}
 
public Goal(byte[] picture) {
this.picture = picture;
 
}
 
public byte[] getPicture() {
return picture;
}
public void setPicture(byte[] picture) {
this.picture = picture;
}
 

my problem is how do i pass image as byte to servlet request parameter eg
assuming i have

String picture = request.getParameter("picture");
 

how do i code it as byte and pass it in servlet request. Is it like this

byte[] picture = null;
 
 

[Anas Mosaad]

Use commons file upload and Multi-part form.

If you have a client application that can pass the file as string, you should encode it using base 64 encoding.

[bernouli]

i tried this
String encoded = Base64.encodeFromFile("data/inputImage.png");
but it returns error method encodeFromFile not found[b]

[Anas Mosaad]

I don't know what Base64 implementation you are using. You may use the open source version from Apache Commons codec library. Here's how your code might look like using Commons-codec:

byte[] binaryData = null;
// read data from the file into binaryData
Base64.encodeBase64(binaryData );
 

You can find the library @ http://commons.apache.org/codec/

[bernouli]

what about the headers please
thanks

[Anas Mosaad]

Which headers do you mean?!

[bernouli]

what about the headers please
thanks