?? loginservlet.java
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package com.ascenttech.ebookstore.servlet;
import javax.servlet.*;
import javax.servlet.http.*;
import com.ascenttech.ebookstore.bean.*;
import com.ascenttech.ebookstore.shopcart.ShoppingCart;
import com.ascenttech.ebookstore.util.*;
import java.io.*;
import java.util.*;
import java.sql.*;
public class LoginServlet extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GBK";
private ServletContext sc=null;
//Initialize
public void init() throws ServletException {
super.init();
sc=this.getServletContext();
}
//Process the HTTP Get request
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
String varname = request.getParameter("usename");
String varpassword = request.getParameter("password");
String reg = request.getParameter("Submit2");
if(reg !=null){
response.sendRedirect("register.jsp");
return;
}
String register = request.getParameter("register");
if(register!=null){
doRegister(request, response);
return;
}
boolean succ=false;
Customer cu=new Customer();
try {
succ = cu.login(varname,varpassword);
}
catch (SQLException ex) {
ex.getErrorCode();
}
String username=varname;
if(succ){
this.doBrowse(request, response);
HttpSession mysession = request.getSession(false);
ShoppingCart mycart = new ShoppingCart();
mysession.setAttribute(username,mycart);
mysession.setAttribute("username",username);
}
else{
this.doError(request, response);
}
return;
}
//Process the HTTP Post request
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
doGet(request, response);
}
private void doBrowse(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException{
RequestDispatcher rd=sc.getRequestDispatcher("/querybook.jsp");
rd.forward(request,response);
}
private void doRegister(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException{
Customer cust = new Customer();
cust.setUser(request.getParameter("username"));
cust.setPassword(request.getParameter("password"));
cust.setName(request.getParameter("name"));
cust.setTitle(request.getParameter("title"));
cust.setEmail(request.getParameter("email"));
try {
cust.saveInfo();
}
catch (Exception ex) {
ex.printStackTrace();
}
RequestDispatcher rd=sc.getRequestDispatcher("/login.jsp");
rd.forward(request,response);
}
private void doBrowseErr(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException{
RequestDispatcher rd=sc.getRequestDispatcher("/login.jsp");
rd.forward(request,response);
}
private void doError(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException{
request.setAttribute("error","name or password error!");
this.doBrowseErr(request, response);
}
//Clean up resources
public void destroy() {
}
}
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