Resize JPEG and GIF'S Images - JSP

Java greetings!
Somebody knows as can make to create an image pequena(sendo the miniature), without losing quality?
therefore I am making upload of images, that are recorded in the DB... are wanting to make in the following way: thus q the user to make upload of the image, is created a miniature of the image and kept original(having been image GREAT).
Somebody can help me? or to indicate some classroom and examples so that it can make this?
Since already I am thankful!

how I make to use the thumbnail Classroom with my Servlet, therefore the thumbnail classroom uses parameters of String and the binary Servlet. as to decide this?
Since already I am thankful!
package com.brutus;
import java.io.*;
import java.util.*;
import java.sql.*;
import javax.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class BlobUploadServlet extends HttpServlet{
private static String dbUserName = "root";
private static String dbPassword = "";
private static String urlDb = "jdbc:mysql://localhost/test";
private static final char CR = 13;
private static final char LF = 10;
protected String boundary = null;
protected Hashtable params = new Hashtable();
public void doPost( HttpServletRequest request,HttpServletResponse response )
throws ServletException, IOException{
ServletOutputStream out = response.getOutputStream();
ServletInputStream in = request.getInputStream();
BufferedInputStream bin = new BufferedInputStream(in);
boundary = getBoundary(request.getHeader("content-type"));
out.println("<html><body><pre>");
out.println("boundary =\n"+boundary);
out.println();
byte[] bytes = new byte[128];
in.readLine(bytes,0,bytes.length);
String line = new String(bytes);
Hashtable header = null;
while(in.readLine(bytes,0,bytes.length)>=0){
line = new String(bytes);
if(line.startsWith("Content-Disposition:")){
out.println(line);
header = parseHeader(line);
updateParams(header);
}else if(line.startsWith("Content-Type:")){
params.put("Content-Type",
line.substring("Content-Type:".length()).trim());
}else{
if(header!=null&&bytes[0]==13){
if(header.containsKey("filename")){
displayParams(out);
out.println(" ...saving payload");
savePayload(params,bin);
header = null;
}else{
String name = (String)header.get("name");
String value = getParameter(in).trim();
params.put(name,value);
}if(line.indexOf(boundary)>=0)
out.println(line);
bytes = new byte[128];
out.println("</pre></body></html>");
out.close();
private void displayParams(ServletOutputStream out)
throws java.io.IOException{
for (Enumeration e = params.keys();e.hasMoreElements();) {
String key = (String)e.nextElement();
out.println(" "+key+" = "+params.get(key));
private void updateParams(Hashtable header){
for (Enumeration e = header.keys();e.hasMoreElements();) {
String key = (String)e.nextElement();
params.put(key,header.get(key));
private String getParameter(ServletInputStream in)
throws java.io.IOException{
byte[] bytes = new byte[128];
in.readLine(bytes,0,bytes.length);
return new String(bytes);
private String getBoundary(String contentType){
int bStart = contentType.indexOf("boundary=")+"boundary=".length();
return "" + CR + LF + "--" + contentType.substring(bStart);
private void savePayload(Hashtable params,BufferedInputStream is)
throws java.io.IOException{
int c;
PushbackInputStream input = new PushbackInputStream(is,128);
ByteArrayOutputStream out = new ByteArrayOutputStream();
while ( (c=read(input,boundary)) >= 0 )out.write( c );
//int id = Integer.parseInt((String)params.get("ID"));
saveBlob((String)params.get("filename"),out.toByteArray());
out.close();
private int read( PushbackInputStream input, String boundary )
throws IOException
StringBuffer buffer = new StringBuffer();
int index = -1;
int c;
do {
c = input.read();
buffer.append( (char)c );
index++;
while ( (buffer.length() < boundary.length()) && (c == boundary.charAt(index)) );
if ( c == boundary.charAt(index) ){
int type = -1;
if ( input.read() == '-' )
type = -2;
while ( input.read() != LF );
return type;
while ( index >= 0 ){
input.unread( buffer.charAt(index));
index--;
return input.read();
private Hashtable parseHeader(String line){
Hashtable header = new Hashtable();
String token = null;
StringTokenizer st = new StringTokenizer(line,";");
while(st.hasMoreTokens()){
token = ((String)st.nextToken()).trim();
String key = "";
String val = "";
int eq = token.indexOf("=");
if(eq <0) eq = token.indexOf(":");
if(eq >0){
key = token.substring(0,eq).trim();
val = token.substring(eq+1);
val = val.replace('"',' ');
val = val.trim();
header.put(key,val);
return header;
public void saveBlob(String description,byte[] out){
String cmd = "INSERT INTO Photos (Description,Image) VALUES(?,?)";
System.out.println(cmd);
try {
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection(urlDb,dbUserName,dbPassword);
PreparedStatement pstmt = con.prepareStatement(cmd);
pstmt.setString(1, description);
pstmt.setBytes(2, out);
System.out.println(pstmt.executeUpdate());
con.close();
catch(ClassNotFoundException e){
e.printStackTrace();
catch(SQLException e){
e.printStackTrace();
}

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hey tom,
i also use this code and also had these problems. i solved it by adding just one line after your if-else: originalImage.flush();
else {
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originalImage.flush();
// this code ensures that all the pixels in the image are loaded
Image temp = new ImageIcon(resizedImage).getImage();
.

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