capture image from mysql

Hello people!

I'm trying to retrieve an image of the mysql database, I am trying to
restore the image using servlet but I'm not very skilled with it ...
I code returns the following error:

java.lang.IllegalStateException: Committed
at org.mortbay.jetty.Response.resetBuffer(Response.java:995)
at org.mortbay.jetty.Response.reset(Response.java:938)
at
br.com.google.server.FileUploadServlet.doGet(FileUploadServlet.java:
52)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
487)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
362)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
181)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
729)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
405)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at
org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:
49)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
505)
at org.mortbay.jetty.HttpConnection
$RequestHandler.headerComplete(HttpConnection.java:829)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
395)
at org.mortbay.thread.QueuedThreadPool
$PoolThread.run(QueuedThreadPool.java:488)
[WARN] 405 - GET /upload (127.0.0.1) 1462 bytes
Request headers
Host: 127.0.0.1:8888
Connection: keep-alive
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/
535.11 (KHTML, like Gecko) Chrome/17.0.963.83 Safari/535.11
Accept: */*
Referer: http://127.0.0.1:8888/ProjetoImagem.html?gwt.codesvr=127.0.0.1:9997
Accept-Encoding: gzip,deflate,sdch
Accept-Language: pt-BR,pt;q=0.8,en-US;q=0.6,en;q=0.4
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: JSESSIONID=uibpkj9tbmhv
Response headers
Content-Type: text/html; charset=iso-8859-1
Content-Length: 1462

I will also post my class on the server side:

public class FileUploadServlet extends HttpServlet {

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse
resp) throws ServletException, IOException {
super.doGet(req, resp);

Connection conn = null;
Statement st = null;
try
{
Class.forName(AbstractDAO.DRIVER);
conn = DriverManager.getConnection(AbstractDAO.URL,
AbstractDAO.USUBD, AbstractDAO.SENHABD);

st = conn.createStatement();
ResultSet rs = st.executeQuery("SELECT IMAGEM FROM tbl_imagem where
CD_IMAGEM = 2");

String imgLen = "";

while(rs.next()){
imgLen = rs.getString(1);
System.out.println(imgLen.length());
int len = imgLen.length();
byte [] rb = new byte[len];
InputStream readImg = rs.getBinaryStream(1);
int index = readImg.read(rb, 0, len);
System.out.println("index ------------------------" + index);
resp.reset();
resp.setContentType("image/jpg");
resp.getOutputStream().write(rb, 0, len);
resp.getOutputStream().flush();
}

st.close();
resp.getOutputStream().close();

} catch (Exception e) {
e.printStackTrace();
}
}
}

to retrieve the client-side image I made as follows:

Image image = new Image(GWT.getHostPageBaseURL() + "upload");
rootPanel.add(image, 289, 138);
image.setSize("200px", "200px");

Anyone know any solution for me to solve my problem or any tips that I
may be using?

Thank you!
Leonardo Terrão

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