HI, sanjeev,
Thanks a lot for your help. Last time i send you my code which may not reach you. I add those code here .
Thanks in advance .
bin
/***********************************************************************************/
StatApplet.java, this is applet program loaded in StatApplet.html. there is JeditorPane which associate
with servlet program (Section1servlet.java)inside/
/*************************************************************************************/
public class StatApplet extends JApplet implements ActionListener
{
public void init()
{
StatPanel = new JPanel();
StatPanel.setLayout(new BorderLayout());
JTabbedPane tabs = new JTabbedPane(SwingConstants.TOP)
JPanel contentPanel = new JPanel();
contentPanel.setLayout(new BorderLayout());
JPanel textPanel = new JPanel();
textPanel.setLayout(new BorderLayout());
sumPane = new JEditorPane();
sumPane.setEditable(false);
sumStr = "summary";
initSum(sumStr, sumPane);
JScrollPane scrollPane = new JScrollPane(sumPane);
textPanel.add(scrollPane, "Center");
contentPanel.add(textPanel, "Center");
JPanel imagePanel = new JPanel();
img = getImage(getCodeBase(), "money.gif");
Icon icon = new ImageIcon(img);
JButton button = new JButton(icon);
imagePanel.add(button, "Center");
contentPanel.add(imagePanel, "West");JPanel contentPanel4 = new JPanel();
contentPanel4.setLayout(new BorderLayout()); JPanel subPanel3 = new JPanel();
subPanel3.setLayout(new BorderLayout());
// this is JeditorPane which invoke servlet
try{
sumPane3 = new JEditorPane(new URL("http://UrL/root/servlet/Section1Servlet"));
}catch(IOException ex){
}
sumPane3.setEditable(false)
JScrollPane scrollPane3 = new JScrollPane(sumPane3);
subPanel3.add(scrollPane3, "Center");
JPanel controlPanel4 = new JPanel();
controlPanel4.setLayout(new GridLayout(2, 1));Icon icon3 = new ImageIcon(img3);
JButton button3 = new JButton(icon3);
controlPanel4.add(button3, "Center");
JPanel buttonPanel4 = new JPanel();
buttonPanel4.setLayout(new GridLayout(2, 1));
addButton(buttonPanel4, "Coin Flip Simulation");
addButton(buttonPanel4, "Independent Dice Simulation");
controlPanel4.add(buttonPanel4, "South");
contentPanel4.add(subPanel3, "Center");
contentPanel4.add(controlPanel4, "West");
tabs.addTab("Home", contentPanel); tabs.addTab("Section 1", contentPanel4);
tabs.addTab("Section 2", contentPanel3);
tabs.addTab("Section 3", contentPanel2);
StatPanel.add(tabs,"Center");
// add menu bar into stat applet panel
JMenuBar mbar= new JMenuBar();
JMenu helpMenu= new JMenu("Help");
helpMenu.setMnemonic('H');
helpMenu.add(item= new JMenuItem("Contents", 'C'));
item.addActionListener(this);
mbar.add(helpMenu);
StatPanel.add(mbar, "North");
Container contentPane = getContentPane();
contentPane.add(StatPanel);
}
}
/************************************************************************************************************/
Section1Servlet.java. It is invoked from StatApplet.java. and it will invoke Showsection1.java via Response.sendredirect(). ShowSection1 always is invoked two times and when ShowSection1.java invoke another servlet program, the session attributes are lost.
/****************************************************************************************************/
/**
* This application is invoked from StatApplet.java(Applet). It retrieves the questions
* of section1 from database and put these questions in session.then invoke showSection1.java
*/
public class Section1Servlet extends HttpServlet {
public synchronized void init (ServletConfig config) throws ServletException {
try {
super.init();
} catch(Exception ex) {
}
}
public void doGet (HttpServletRequest request,HttpServletResponse res) throws IOException, ServletException {
PrintWriter out = res.getWriter();
int allQuestion=0; // total question number
res.setContentType("text/html");
// get session
HttpSession session = request.getSession(true);
session.setMaxInactiveInterval(-1);
try{
conn=getConnected();
state = conn.createStatement();
} catch(Exception ex) {
out.println("<hr>" +ex.getMessage() + "<hr>");
return;
}
String query="select question,answer from questionsets where cid='"+"stat221"+"' and sectionid='"+"1'";
try{
state = conn.createStatement();
rset=state.executeQuery(query);
while (rset.next()){
data="rset.getString(1);
QuestionV.add(data);
AnswerV.add(answer);
allQuestion++;
}
} catch(Exception ex) {
out.println("<hr>" +ex.getMessage() + "<hr>");
}
try{
conn.close();
}catch (Exception ex) {
out.println("<hr>" +ex.getMessage() + "<hr>");
}
session.setAttribute("SECTION1QSET",QuestionV);
session.setAttribute("SECTION1ANSW",AnswerV);
session.setAttribute("SECTION1TOTAL",new Integer(allQuestion));
// ShowSection1.java is invoked here
res.sendRedirect("/root/servlet/ShowSection1"+"?Section1Servlet");
// postForm(out);
System.out.println("end of Section1Servlet");
return;
}
/**
* Create connection to database.
* @return a connection.
*/
private Connection getConnected() throws Exception {
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
return (DriverManager.getConnection(dbstring));
}
/* public void doPost(HttpServletRequest request,HttpServletResponse res) throws IOException,ServletException {
doGet(request, res);
} */
}
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