Here is a simple jsp code that displays an image on browser.

<%@ page import="java.io.*" %>
<%@page contentType="image/gif" %><%
    OutputStream o = response.getOutputStream();
    InputStream is = new FileInputStream(new File("C:/images/image.gif"));
    byte[] buf = new byte[32 * 1024]; 
    int nRead = 0;
    while( (nRead=is.read(buf)) != -1 ) {
        o.write(buf, 0, nRead);
    }
    o.flush();
    o.close();
    return; 
%>