Я создаю динамический c веб-проект, в котором пользователь сначала регистрируется, а затем может войти в систему. В LoginServlet я создал сеанс для запрашивающего пользователя Также он может сменить пароль здесь я использовал текстовый файл в локальной системе для хранения пользовательских данных Моя проблема в том, что я не могу применить logi c в сервлете с измененным паролем, посмотрите в этом сервлете , в котором я упоминаю , не в состоянии применить logi c, что как Я должен проверить данные пользователя из текстового файла и сравнить со старым паролем новый пароль, повторить пароль и обновить новый пароль.
Домашняя страница Html
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h1>HomePage</h1>
<a href="Registration.html">Click to Register</a><br>
<a href="LogIn.html">Click to Login</a>
</body>
</html>
changePassword Html
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h1>changePassword</h1>
<form action="changePassword" method="post">
Enter Your OldPassword<input type="password" name="pass"><br>
Enter Your NewPassword<input type="password" name="npass"><br>
Enter Your Password<input type="password" name="rpass"><br>
<input type="submit">
</form>
</body>
</html>
LogServlet
package com.satateMng.com;
import java.io.BufferedReader;
import java.io.FileReader;
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 javax.servlet.http.HttpSession;
/**
* Servlet implementation class LogInServlet
*/
public class LogInServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public LogInServlet() {
super();
System.out.println("In no-arg constr() of LS");
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println("In doGet() of LS");
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println("In doPost() of Ls");
/*
* access user inputs validate if validation succeed,create session and
* store email if validation failed,show error msg
*/
String email = request.getParameter("email");
String pass = request.getParameter("pass");
StringBuilder sb = new StringBuilder();
if (email == null || email.trim().equals(""))
sb.append("Enter Correct email<br/>");
if (pass == null || pass.trim().equals(""))
sb.append("Enter your password<br/>");
PrintWriter pw = response.getWriter();
String msg = sb.toString();
if (!msg.equals("")) {
// validation failed
pw.write("<html><body><h1><b>" + msg + "</b></h1></body></html>");
}
else
{
// success
BufferedReader br = null;
try {
br = new BufferedReader(new FileReader(Constants.USERFILE));
String line;
while ((line = br.readLine()) != null)
{
System.out.println("coming line=" + line);
String[] sa=line.split("=");
if (email.equals(sa[0]) && pass.equals(sa[1]))
{
// valid user
// create session
HttpSession session = request.getSession(true);
session.setAttribute(Constants.USER, email);
pw.write("<html><body><h1>Welcome " + email+ " </h1><a href='logout'>LogOut</a><br/><a href='ChangePassword.html'>Change Password</a></body></html>");
return;
}
}
pw.write(
"<html><body><h1><b>Your email/password combination is incorrect!try again..</b></h1></body></html>");
}
catch (IOException e)
{
// TODO: handle exception
e.printStackTrace();
pw.write("<html><body><h1>Error</h1><b>Oops something gone complex" + e.getMessage()
+ "</b></body></html>");
return;
}
finally
{
if (br != null)
br.close();
}
}
}
}
ChangePasswordServlet
package com.satateMng.com;
import java.io.BufferedReader;
import java.io.FileReader;
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 javax.servlet.http.HttpSession;
/**
* Servlet implementation class ChangePasswordServlet
*/
public class ChangePasswordServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public ChangePasswordServlet() {
super();
System.out.println("In no-arg constr() of CP..");
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.getWriter().append("Served at: ").append(request.getContextPath());
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("In doPost() of CP..");
/*
* get the session for client
* if session doesn't exist,then scold the user
* if session exist,open the file,validate if old password is correct and
* then update the file contents to reflect new password change for email id of user
*
*/
HttpSession session=request.getSession(false);
PrintWriter pw=response.getWriter();
if(session==null)
{
pw.write("<html><body><h1>we dont know who you are..</h1></body></html>");
}
else
{
String email=(String) session.getAttribute(Constants.USER);
String opass=request.getParameter("pass");
String npass=request.getParameter("npass");
String rpass=request.getParameter("rpass");
/*
* validate if email is correct by looking into file
* and then update
*/
BufferedReader br=null;
try
{
br=new BufferedReader(new FileReader(Constants.USERFILE));
String line=br.readLine();
while(line!=null)
{
System.out.println("coming line"+line);
String[] sa=line.split("=");
if(email.equals(sa[0]) || opass.equals(sa[1]))
{
//not able to apply logic what I should write code over here thank you
}
}
}
catch(IOException e)
{
// TODO: handle exception
e.printStackTrace();
}
finally
{
if(br!=null)
br.close();
}
pw.write("<html><body><h1><b>your password has changed successfully..</b></h1></body></html>");
}
}
}