Apache tomcat error-http status 404 - tomcat8

Question

//code for my application:-
when i run my application and open the logout or profile page i.e. i click on logout or profile links then the error 404 resource not found occurs //index.html
<h1>Welcome to login pannel</h1>
Login
Logout
Profile
//link.html
Login |
Logout |
Profile
//login.html
<form action="loginservlet" method="post">
Name:<input type="text" name="name"/><br>
Password:<input type="password" name="pass"/><br>
<input type="submit" value="login"/>
</form>
//loginservlet.java
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
/* Servlet implementation class loginservlet
*/
#WebServlet("/loginservlet")
public class loginservlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* #see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
// TODO Auto-generated method stub
res.setContentType("text/html");
PrintWriter out=res.getWriter();
req.getRequestDispatcher("link.html").include(req, res);
String name=req.getParameter("name");
String pass=req.getParameter("pass");
if(pass.equals("1234")){
out.print("You are successfully logged in!");
out.print("<br>Welcome, "+name);
Cookie ck=new Cookie("name",name);
res.addCookie(ck);
}else{
out.print("sorry, username or password error!");
req.getRequestDispatcher("login.html").include(req, res);
}
out.close();
}
}
//profileservlet.java//
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class profileservlet
*/
#WebServlet("/profileservlet")
public class profileservlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* #see HttpServlet#HttpServlet()
*/
public profileservlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* #see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
// TODO Auto-generated method stub
res.setContentType("text/html");
PrintWriter out=res.getWriter();
req.getRequestDispatcher("link.html").include(req, res);
Cookie ck[]=req.getCookies();
if(ck!=null){
String name=ck[0].getValue();
if(!name.equals("")||name!=null){
out.print("<b>Welcome to Profile</b>");
out.print("<br>Welcome, "+name);
}
}else{
out.print("Please login first");
req.getRequestDispatcher("login.html").include(req, res);
}
out.close();
//response.getWriter().append("Served at: ").append(request.getContextPath());
}
}
//logoutservlet.java
import java.io.IOException;
import java.io.PrintWriter;
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 logoutservlet
*/
#WebServlet("/logoutservlet")
public class logoutservlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* #see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
// TODO Auto-generated method stub
res.setContentType("text/html");
PrintWriter out=res.getWriter();
req.getRequestDispatcher("link.html").include(req, res);
Cookie ck=new Cookie("name","");
ck.setMaxAge(0);
res.addCookie(ck);
out.print("you are successfully logged out!");
//res.getWriter().append("Served at: ").append(req.getContextPath());
}
}
//web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>log_in_out</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
</web-app>