Bank Accouunt Servlet Sample

package servlet;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.RequestDispatcher;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import manager.BankAccountMgr;

import manager.CustomerMgr;

import model.BankAccount;

import model.Customer;

public class BankAccountServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

public BankAccountServlet() {

super();

}

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

System.out.println("Servlet starting............");

//try {

retrieveAcctType(request,response);

doPost(request, response);

//} catch (Exception e) {

//e.printStackTrace();

//}

}

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

try{

System.out.println("Servlet starting............do post");

updatebalance(request,response);

}catch (Exception e)

{

e.printStackTrace();

}

/*String action =request.getParameter("action");

System.out.println(action);

if(action.equalsIgnoreCase("transfertoother"))

{

try{

initialTransfertoOther(request,response);

}

catch (Exception e)

{

e.printStackTrace();

}

}*/

//if (request.getParameter("T").equals("Transfer"))

// {

//}

}

public void retrieveAcctType(HttpServletRequest request,HttpServletResponse response)throws IOException,ServletException

{

//HttpSession session=request.getSession(true);

//String id=request.getAttribute("userid").toString();

//String id=request.getParameter("roleid");

String id="C1";

try{

BankAccountMgr accountmgr=new BankAccountMgr();

BankAccount[] result=(BankAccount[]) accountmgr.retrieveAcctType(id);

request.setAttribute("acctid",result);

RequestDispatcher dispatcher = request.getRequestDispatcher("TransfertoOther.jsp");

dispatcher.forward(request, response);

}

catch(Exception e){

e.printStackTrace();

request.setAttribute("exception", e);

RequestDispatcher disp=request.getRequestDispatcher("ErrorMsgForm.jsp");

disp.forward(request,response);

}

}

public void updatebalance(HttpServletRequest request,HttpServletResponse response)

throws IOException,ServletException

{

String custId="C1";

// String id=request.getParameter("id");

String facctid= request.getParameter("fromAccount");

System.out.println(facctid);

String tacctid=request.getParameter("transferToAccountId");

String tamount=request.getParameter("transferAmount");

String accounttype=request.getParameter("atype");

Float tranamount;

Integer fromaccId,toaccId;

int resultvalidate = 0;

BankAccountMgr accountmgr=new BankAccountMgr();

try{

resultvalidate = accountmgr.validateaccount(Integer.parseInt(request.getParameter("transferToAccountId")));}

catch(Exception e)

{

System.out.println(e.getMessage());

}

if (resultvalidate == 1)

{

try{

fromaccId=Integer.parseInt(facctid);

toaccId=Integer.parseInt(tacctid);

tranamount=Float.parseFloat(tamount);

try{

//BankAccountMgr accountmgr=new BankAccountMgr();

boolean result=accountmgr.updatebalance(custId, fromaccId,toaccId,tranamount,accounttype);

if(result ==true)

{

RequestDispatcher disp=request.getRequestDispatcher("TranMsgForm.jsp");

disp.forward(request,response);

}

}

catch(Exception e){

e.printStackTrace();

request.setAttribute("exception", e);

RequestDispatcher disp= request.getRequestDispatcher("ErrorMsgForm.jsp");

disp.forward(request,response);

}

}catch(NumberFormatException nfe)

{

PrintWriter out=response.getWriter();

out.println("error");

}

}

else

{

PrintWriter out=response.getWriter();

out.println("Transfer to account not found");

}

}

/*private void initialTransfertoOther(HttpServletRequest request,HttpServletResponse response)throws Exception{

try

{

//HttpSession session=request.getSession(true);

//String id=request.getAttribute("userid").toString();

String id="C1";

BankAccountMgr accountmgr=new BankAccountMgr();

BankAccount[] result=(BankAccount[]) accountmgr.retrieveAcctType(id);

request.setAttribute("acctid",result);

//BankAccount[] acc=null;

RequestDispatcher dispatcher = request.getRequestDispatcher("TransfertoOther.jsp");

if (dispatcher != null){

dispatcher.forward(request, response);

}

response.setContentType("text/html");

PrintWriter out=response.getWriter();

out.println("GET Request.No Form Post");

}

catch(Exception e){

e.printStackTrace();

request.setAttribute("exception", e);

RequestDispatcher disp=request.getRequestDispatcher("ErrorMsgForm.jsp");

disp.forward(request,response);

}

}*/

}