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Java JSP login And SignUp Form With Session Using mySQL

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index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>login</title>
</head>
<body>
<form action="login.jsp" method="post">

User name :<input type="text" name="usr" /><br>
password :<input type="password" name="password" /><br>
<input type="submit" />

</form>
<p>New user. <a href="register.html">Login Here</a>.
</body>


</html>

login.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@page import="java.sql.*,java.util.*"%>
<%
String userid=request.getParameter("userid"); 
session.putValue("userid",userid); 
String password=request.getParameter("password"); 
Class.forName("com.mysql.jdbc.Driver"); 
java.sql.Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root",""); 
Statement st= con.createStatement(); 
ResultSet rs=st.executeQuery("select * from users where userid='"+userid+"' and password='"+password+"'"); 
try{
	rs.next();
	        if(rs.getString("password").equals(password)&&rs.getString("userid").equals(userid)) 
			{ 
			      out.println("Welcome "  +userid); 
			} 
		else{
			 out.println("Invalid password or username.");
		    }
}
catch (Exception e) {
e.printStackTrace();
}
%>

register.html

<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>new registration</title>
</head>
<body>
<form action="reg-process.jsp" method="post">
First name :<input type="text" name="fname" />
Last name :<input type="text" name="lname" />
Email ID :<input type="text" name="email" />
User name :<input type="text" name="userid" />
password :<input type="password" name="password" />
<input type="submit" />

</form>
</body>
</html>

reg-process.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@page import="java.sql.*,java.util.*"%>
<%
String fname=request.getParameter("fname");
String lname=request.getParameter("lname");
String email=request.getParameter("email");
String userid=request.getParameter("userid");
String password=request.getParameter("password");
try
{
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/student", "root", "");
Statement st=conn.createStatement();

int i=st.executeUpdate("insert into users(fname,lname,email,userid,password)values('"+fname+"','"+lname+"','"+email+"','"+userid+"','"+password+"')");
out.println("Thank you for register ! Please <a href='index.html'>Login</a> to continue.");
}
catch(Exception e)
{
System.out.print(e);
e.printStackTrace();
}
%>

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