Como exibir em JSP Imagens gravadas no postgres 9.0

Assim não funciona:

    ResultSet rs = null; 
    Connection conn = null; 
    PreparedStatement stmt = null;
    String url = "jdbc:postgresql://localhost/app1";
    try {
        Class.forName("org.postgresql.Driver");
        conn = DriverManager.getConnection(url,"xxxx","yyyyy");
        String sql = " select foto from pesssoa where idpesso=?";
        try {
            
            stmt = conn.prepareStatement(sql);
            stmt.setLong(1,id);
            rs = stmt.executeQuery();
            rs.next();
            //=================
            byte[] bytearray = new byte[4096]; 
            int size=0; 
            InputStream sImage; 
            sImage = rs.getBinaryStream("foto"); 
            response.reset(); 
            response.setContentType("image/jpeg"); 
            response.addHeader("Content-Disposition","filename=getimage.jpeg"); 
            while((size=sImage.read(bytearray))!= -1 ) { 
                response.getOutputStream().write(bytearray,0,size); 
            }
            response.flushBuffer(); 
            sImage.close(); 
            conn.close(); 
        }

Alguem sabe?