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cookies giving unusual values along with set values in servlet

I have set cookies in a servlet class and read those cookies values in another servlet class. In another servlet class along with the set cookies values, I am getting some unusual values.
My Home.java servlet class results set ::
first result
Hello JSESSIONID, Hello A502A7144AE035ED9B1A2549F5C7B74B
Hello first_name, Hello RACHEL
Hello last_name, Hello KIM
second result
Hello JSESSIONID, Hello A502A7144AE035ED9B1A2549F5C7B74B
Hello first_name, Hello CAIRO
Hello last_name, Hello SENGAL
in both the results I am getting the set cookies values and names but along with them I am getting JSESSIONID and A502A7144AE035ED9B1A2549F5C7B74B. I can't understand from where do these cookies values are appearing? How can I remove this? Why are these values appearing?
My code :
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class Authenticate
*/
#WebServlet("/Authenticate")
public class Authenticate extends HttpServlet {
private static final long serialVersionUID = 1L;
public Authenticate() {
super();
// TODO Auto-generated constructor stub
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.getWriter().append("Served at: ").append(request.getContextPath());
}
#Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try
{
// Set response content type
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String firstname = request.getParameter("firstname");
String lastname = request.getParameter("lastname");
out.print("Welcome "+ firstname);
// Create cookies for first and last names.
Cookie f_name = new Cookie("first_name", firstname);
Cookie l_name = new Cookie("last_name", lastname);
// Add both the cookies in the response header.
response.addCookie( f_name );
response.addCookie( l_name );
//creating submit button
out.print("<form action='Home' method='post' >");
out.print("<input type='submit' value='cookie click' />");
out.print("</form>");
out.close();
}
catch(Exception ex)
{
System.out.println("exception occured");
System.out.println(ex.toString());
}
}
}
Code for Home servlet
#WebServlet("/Home")
public class Home extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* #see HttpServlet#HttpServlet()
*/
public Home() {
super();
// TODO Auto-generated constructor stub
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
Cookie ck[] = request.getCookies();
if (ck != null) {
for (int i = 0; i < ck.length; i++) {
out.print("Hello " + ck[i].getName() + ", ");
out.print("Hello " + ck[i].getValue());
out.print("<br />");
}
}
out.close();
} catch (Exception e) {
System.out.println(e);
}
}
}

HashMap is not storing object. Don't know why

Below is my code:
package com.newyzon.controllers;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.rpc.ServiceException;
import com.newyzon.beans.Cart;
import com.newyzon.beans.BookData;
import com.newyzon.beans.BookMeta;
import com.newyzon.beans.DisplayBookList;
import com.newyzon.services.*;
public class BooklistController {
LoginController lc;
Map<String, BookData> booklist = new HashMap<String, BookData>();
public BooklistController(LoginController lc) {
this.lc = lc;
}
public void displayBookList(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, ServiceException {
BooksService bs = new BooksServiceLocator();
Books books = bs.getBooksPort();
//response.getWriter().append(books.getBook(1).getTitle());
int quant = books.getSize();
String output = "<br/>";
for(int i=0; i < quant; i++) {
Book bk = books.getBook(i);
BookData bd = new BookData(bk.getId(), bk.getTitle(), bk.getAuthor(), bk.getPublisher());
output += "<a href='Controller?task=addbook&bookid=" + bd.getId() + "'>" + bd.getTitle() + "</a><br/>";
booklist.put("" + bd.getId(), bd);
}
DisplayBookList dbl = new DisplayBookList(output);
request.getSession().setAttribute("displayBookList", dbl);
lc.sendRedirectJsp("bookList", request, response);
}
public void addToCart(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String bookid = request.getParameter("bookid");
BookData bk = booklist.get(bookid);
// Add the book to the cart
Cart cart = (Cart)request.getSession().getAttribute("cart");
if(cart == null) {
cart = new Cart();
request.getSession().setAttribute("cart", cart);
}
BookMeta bm;
if((bm = cart.contains(bk)) != null) {
bm.setQuantity(bm.getQuantity() + 1);
} else {
bm = new BookMeta(bk, 1);
cart.getBooks().add(bm);
}
}
}
For some reason, the HashMap.put() is run, but the resultant booklist object contains no BookData objects, instead it just puts a null value in there. I've debugged and checked to see that the parameter 'bd' contains a BookData object, (and it does), so why doesn't it end up in the hashmap?

how do i solve the double method while string in java with servlet [closed]

Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 7 years ago.
Improve this question
package com.dev.web.Controller;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.dev.web.Dao.UserDao;
import com.dev.web.Model.User;
public class UserControll extends HttpServlet
{
private static final long serialVersionUID = 1L;
private static String INSERT_OR_EDIT = "/user.jsp";
private static String LIST_USER = "/listEmp.jsp";
private UserDao dao;
public UserControll() {
super();
UserDao dao = new UserDao();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String forward="";
String action = request.getParameter("action");
if (action.equalsIgnoreCase("delete")){
int Employee_Id= Integer.parseInt(request.getParameter("Employee_Id"));
dao.deleteUser(Employee_Id);
forward = LIST_USER;
request.setAttribute("users", dao.getAllUsers());
} else if (action.equalsIgnoreCase("edit")){
forward = INSERT_OR_EDIT;
int Employee_Id = Integer.parseInt(request.getParameter("empId"));
User user = dao.getUserById(Employee_Id);
request.setAttribute("user", user);
} else if (action.equalsIgnoreCase("listUser")){
forward = LIST_USER;
request.setAttribute("Employee", dao.getAllUsers());
} else {
forward = INSERT_OR_EDIT;
}
RequestDispatcher view = request.getRequestDispatcher(forward);
view.forward(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
User user = new User();
user.setEmployee_Name(request.getParameter("empname"));
user.setSalary(request.getParameter("empsalary"));// here is my error..i declared salary is double
try {
Date dob = new SimpleDateFormat("MM/dd/yyyy").parse(request.getParameter("empdob"));
user.setDob(dob);
} catch (ParseException e) {
e.printStackTrace();
}
user.setActive(request.getParameter("empactive"));// here is my error.. i declared active is boolean
String empid = request.getParameter("empid");
if(empid == null || empid.isEmpty())
{
dao.addUser(user);
}
else
{
user.setEmployee_ID(Integer.par`enter code here`seInt(empid));
dao.updateUser(user);
}
RequestDispatcher view = request.getRequestDispatcher(LIST_USER);
request.setAttribute("users", dao.getAllUsers());
view.forward(request, response);
}
}

The getParameter() method of HttpServletRequest is inherited from ServletRequest. From the API docs you can see this method always returns a string. You need to parse your boolean or double from this string, for example
Double.parseDouble(request.getParameter("empsalary"));

How do I write a servlet which rotates images?

Hi just wanted to share this servlet it takes 2 arguments ( img-> image name , rot ->rotation of the images) loads the image from the images directory rotates it and outputs it to the servlet stream
you can find it in the answer below

package at.buchinger.mapdisplay;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriter;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class RotatedImage
*/
public class RotatedImage extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* #see HttpServlet#HttpServlet()
*/
public RotatedImage() {
super();
// TODO Auto-generated constructor stub
}
/**
* #see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String img = (String) request.getParameter("img");
String path = getServletContext().getRealPath("image/"+img);
String r;
r=request.getParameter("rot");
if(r==null){
r="0";
}
double rot = Double.parseDouble( r);
BufferedImage image = ImageIO.read(new File(path));
AffineTransform tx = new AffineTransform();
tx.rotate(Math.toRadians(rot), image.getWidth()/2, image.getHeight()/2);
AffineTransformOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_BILINEAR);
image = op.filter(image, null);
ServletContext sc = getServletContext();
String filename = getServletContext().getRealPath(path);
// Get the MIME type of the image
String mimeType = sc.getMimeType(filename);
if (mimeType == null) {
sc.log("Could not get MIME type of "+filename);
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
// Set content type
response.setContentType(mimeType);
ServletOutputStream out = response.getOutputStream();
Iterator iter = ImageIO.getImageWritersByMIMEType(mimeType);
ImageIO.write(image, "png", out);
}
/**
* #see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}

Key in Request Token is null or blank- Brick red Social Auth

I need to import contacts to the enable my web app users to send invitation to his/her friends from my site, I am using SocioAuth Open source API to get this done, I have written 2 servlets to get this done I am pasting the code of my servlet. when I deployed the app in my Ec2 instance, I am getting an exception saying "Key in request token is null or blank in the line number 27 of the NewSocialAuthentication,
package com.auth.actions;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.brickred.socialauth.AuthProvider;
import org.brickred.socialauth.AuthProviderFactory;
public class NewSocialAuthentication extends HttpServlet{
/**
*
*/
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("Coming to doGet of NewSocialApp..");
#SuppressWarnings("unused")
PrintWriter out = response.getWriter();
String socialAppId = request.getParameter("id");
System.out.println("SocialAppId: "+socialAppId);
AuthProvider provider;
try {
provider = AuthProviderFactory.getInstance(socialAppId);
String returnToUrl = "http://ec2-50-19-118-108.compute-1.amazonaws.com/SocialAuthNew6/return";
System.out.println("Return URL..." + returnToUrl);
String urlString = provider.getLoginRedirectURL(returnToUrl);
System.out.println("URLString: "+urlString);
request.getSession().setAttribute("SocialAuth", provider);
response.sendRedirect(response.encodeRedirectURL(urlString));
} catch (Exception e) {
System.out.println("Exception...");
e.printStackTrace();
}
}
}
package com.auth.actions;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.brickred.socialauth.AuthProvider;
import org.brickred.socialauth.Contact;
import org.brickred.socialauth.Profile;
import org.brickred.socialauth.util.*;
public class ReturnServlet extends HttpServlet{
/**
*
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("Coming to doGet of Return Servlet..");
try{
AuthProvider provider = (AuthProvider)request.getSession().getAttribute("SocialAuth");//this the line is rising exception
Profile p = provider.verifyResponse(request);
System.out.println(p.getFirstName());
List<Contact> contactsList = provider.getContactList();
for(int i=0;i<contactsList.size();i++){
response.setContentType("text/html");
PrintWriter out = response.getWriter();
System.out.println(contactsList.get(i).getFirstName()+" : "+contactsList.get(i).getLastName());
out.println(contactsList.get(i).getFirstName());
out.println(contactsList.get(i).getLastName());
}
}
catch(Exception e){
e.printStackTrace();
}
}
}

This is the servlet which redirects to the email service provider
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.brickred.socialauth.AuthProvider;
import org.brickred.socialauth.AuthProviderFactory;
/**
* Servlet implementation class NewSocialAuthentication
*/
public class NewSocialAuthentication extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* #see HttpServlet#HttpServlet()
*/
public NewSocialAuthentication() {
super();
// TODO Auto-generated constructor stub
}
/**
* #see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
#Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
#SuppressWarnings("unused")
PrintWriter out = response.getWriter();
String socialAppId = request.getParameter("id");
System.out.println("SocialAppId: "+socialAppId);
AuthProvider provider;
try {
provider = AuthProviderFactory.getInstance(socialAppId);
//String returnToUrl = "http://ec2-50-16-183-101.compute-1.amazonaws.com/SocialAuthNew/return";
String returnToUrl = "u r returning url ";
System.out.println("Return URL..." + returnToUrl);
String urlString = provider.getLoginRedirectURL(returnToUrl);
System.out.println("URLString: "+urlString);
request.getSession().setAttribute("SocialAuth", provider);
response.sendRedirect(response.encodeRedirectURL(urlString));
} catch (Exception e) {
System.out.println("Exception...");
e.printStackTrace();
}
}
/**
* #see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
#Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
}
the return url would look like this I have embedded in the jsp
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%#page import="org.brickred.socialauth.AuthProvider" %>
<%#page import="org.brickred.socialauth.Contact" %>
<%#page import="org.brickred.socialauth.AuthProvider" %>
<%#page import="org.brickred.socialauth.Profile" %>
<%#page import="java.util.*" %>
Insert title here
CONTACT LIST
<%
try{
AuthProvider provider = (AuthProvider)request.getSession().getAttribute("SocialAuth");
try{
System.out.println(provider.getContactList());
}
catch(Exception e){
System.out.println("Exception Encountered..");
}
Profile p = provider.verifyResponse(request);
List contactsList = provider.getContactList();
%>
Hello, <%= p.getFirstName() %>
Contact List
First Name
Email
<%
for(int i=0;i
"/><%= contactsList.get(i).getFirstName() %><%= contactsList.get(i).getEmail() %>
<%
}
%>
</table>
<input type="submit" value="GET CONTACTS"/>
</form>
<%
}
catch(Exception e){
e.printStackTrace();
}
%>