java sending images over http get doesn't work

Question

I'm trying to send png to server using http get request. I'm using code below to to so.
String encoding (on client):

byte[] bytes = Files.readAllBytes(Paths.get(chosenFile.getPath()));
String image = new String(bytes, "ISO-8859-1");

Then I send http get request to server with String image. Server receive it but I get image that is not the same as one I sent (I can't open one I received). I'm using URLEncoder.encode(image, "ISO-8859-1") to encode url for http get request. When I use URLEncoder.encode(image, "UTF-8"), the same happens.

Why this doesn't work? Is there any better way of doing this kind of stuff?

UPD #0

Code for sending an image:

private void jMenuItem5ActionPerformed(java.awt.event.ActionEvent evt) {                                           
    JFileChooser chooser= new JFileChooser();
    int choice = chooser.showOpenDialog(this);

    if (choice != JFileChooser.APPROVE_OPTION) return;
        File chosenFile = chooser.getSelectedFile();

    try {
        byte[] bytes = Files.readAllBytes(Paths.get(chosenFile.getPath()));
        String image = new String(bytes, "ISO-8859-1");

        if(image != null){
            boolean allsent = false;
            long k = 0;
            String query = "0";
            while(!allsent){
                String s = image;
                String send = "";
                long q;
                if(k+400>image.length()){
                    q=image.length();
                    allsent=true;
                }
                else q = k+400;
                for(long i=k;i<q;i++)
                    send+=s.charAt((int) i);
                System.out.println(send);
                String response = new HTTP().GET(Constants.ADDRESS_ADDIMAGE
                        + "?" + Constants.USERNAME + "=" + URLEncoder.encode(user, "UTF-8")
                        + "&" + Constants.IMAGE + "=" + URLEncoder.encode(send, "ISO-8859-1")
                        + "&" + Constants.QUERY + "=" + URLEncoder.encode(query, "UTF-8"));
                k+=400;
                query="1";                            
            }
        }
    } catch (IOException ex) {
        ex.printStackTrace();
    }

}

Note: HTTP().GET() invokes standard http get.

UPD #1 Server code

@GET
@Path("/addimage")
@Produces(MediaType.APPLICATION_JSON)
public String addImage(@QueryParam("username") String uname, @QueryParam("image") String image, @QueryParam("query") String query) {       
    if(query.equals("0")){
        String s = image;
        JDBC.addImage("ABase", "MarketLogin", "image", uname, s);
    }
    else{
        String s = JDBC.selectDB("ABase", "MarketLogin", "image", uname, "username") + image;
        JDBC.addImage("ABase", "MarketLogin", "image", uname, s);
    }
    return "1";
}

Note: JDBC is class for updating mysql DB. Server is expecting String encoded by ISO-8859-1.

Answer 1

How about using a HttpURLConnection and sending bytes instead of strings.

HttpURLConnection connection;
ByteArrayOutputStream baos;
try {
    URL url = new URL("http://www.somewebsite.com");
    connection = (HttpURLConnection) url.openConnection();
    connection.setDoOutput(true);
    connection.setRequestProperty("Content-Type", "image/jpeg");
    connection.setRequestMethod("POST");

    baos = new ByteArrayOutputStream();
    baos.write(bytes); // your bytes here         
    baos.writeTo(connection.getOutputStream());
}
finally {
    if(baos != null)
       baos.close();
    if(osw != null)
       osw.close();
    if(connection != null)
       connection.disconnect();
}