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Thread: log in register & change password jsp. help pls

  1. #1
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    Post log in register & change password jsp. help pls

    hello! i am a beginner in java.
    i have this jsp's that can log in and register and saves the data to mysql.
    now my problem is the change password i dont really get it. can u guys help me?
    here are my codes.

    there is an error in change.jsp
    database
    CREATE TABLE `members` (
      `id` int(10) unsigned NOT NULL auto_increment,
      `first_name` varchar(45) NOT NULL,
      `last_name` varchar(45) NOT NULL,
      `email` varchar(45) NOT NULL,
      `uname` varchar(45) NOT NULL,
      `pass` varchar(45) NOT NULL,
      `regdate` date NOT NULL,
      PRIMARY KEY  (`id`)
    ) ENGINE=InnoDB DEFAULT CHARSET=latin1;

    index.jsp


    <%@page contentType="text/html" pageEncoding="UTF-8"%>
    <!DOCTYPE html>
    <html>
        <head>
            <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
            <title>JSP Example</title>
        </head>
        <body>
            <form method="post" action="login.jsp">
                <center>
                <table border="1" width="30%" cellpadding="3">
                    <thead>
                        <tr>
                            <th colspan="2">Login Here</th>
                        </tr>
                    </thead>
                    <tbody>
                        <tr>
                            <td>User Name</td>
                            <td><input type="text" name="uname" value="" /></td>
                        </tr>
                        <tr>
                            <td>Password</td>
                            <td><input type="password" name="pass" value="" /></td>
                        </tr>
                        <tr>
                            <td><input type="submit" value="Login" /></td>
                            <td><input type="reset" value="Reset" /></td>
                        </tr>
                        <tr>
                            <td colspan="2">Yet Not Registered!! <a href="reg.jsp">Register Here</a></td>
                        </tr>
                    </tbody>
                </table>
                </center>
            </form>
        </body>
    </html>

    login.jsp


    <%@ page import ="java.sql.*" %>
    <%
        String userid = request.getParameter("uname");    
        String pwd = request.getParameter("pass");
        Class.forName("com.mysql.jdbc.Driver");
        Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/users",
                "root", "");
        Statement st = con.createStatement();
        ResultSet rs;
        rs = st.executeQuery("select * from members where uname='" + userid + "' and pass='" + pwd + "'");
        if (rs.next()) {
            session.setAttribute("userid", userid);
            //out.println("welcome " + userid);
            //out.println("<a href='logout.jsp'>Log out</a>");
            response.sendRedirect("success.jsp");
        } else {
            out.println("Invalid password <a href='index.jsp'>try again</a>");
        }
     
    %>

    reg.jsp

    <%@page contentType="text/html" pageEncoding="UTF-8"%>
    <!DOCTYPE html>
    <html>
        <head>
            <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
            <title>Registration</title>
        </head>
        <body>
            <form method="post" action="registration.jsp">
                <center>
                <table border="1" width="30%" cellpadding="5">
                    <thead>
                        <tr>
                            <th colspan="2">Enter Information Here</th>
                        </tr>
                    </thead>
                    <tbody>
                        <tr>
                            <td>First Name</td>
                            <td><input type="text" name="fname" value="" /></td>
                        </tr>
                        <tr>
                            <td>Last Name</td>
                            <td><input type="text" name="lname" value="" /></td>
                        </tr>
                        <tr>
                            <td>Email</td>
                            <td><input type="text" name="email" value="" /></td>
                        </tr>
                        <tr>
                            <td>User Name</td>
                            <td><input type="text" name="uname" value="" /></td>
                        </tr>
                        <tr>
                            <td>Password</td>
                            <td><input type="password" name="pass" value="" /></td>
                        </tr>
                        <tr>
                            <td><input type="submit" value="Submit" /></td>
                            <td><input type="reset" value="Reset" /></td>
                        </tr>
                        <tr>
                            <td colspan="2">Already registered!! <a href="index.jsp">Login Here</a></td>
                        </tr>
                    </tbody>
                </table>
                </center>
            </form>
        </body>
    </html>

    registration.jsp

    <%@ page import ="java.sql.*" %>
    <%
        String user = request.getParameter("uname");    
        String pwd = request.getParameter("pass");
        String fname = request.getParameter("fname");
        String lname = request.getParameter("lname");
        String email = request.getParameter("email");
        Class.forName("com.mysql.jdbc.Driver");
        Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/users",
                "root", "");
        Statement st = con.createStatement();
        ResultSet rs;
        int i = st.executeUpdate("insert into members(first_name, last_name, email, uname, pass, regdate) values ('" + fname + "','" + lname + "','" + email + "','" + user + "','" + pwd + "', CURDATE())");
        if (i > 0) {
            //session.setAttribute("userid", user);
            response.sendRedirect("welcome.jsp");
           // out.print("Registration Successfull!"+"<a href='index.jsp'>Go to Login</a>");
        } else {
            response.sendRedirect("index.jsp");
        }
    %>

    changepass.jsp

    <title>Change Password</title>
    <h1>Change Password</h1>
    <form method="post" action="change.jsp">
    <table>
    <tr><td>Current Password</td><td><input type="password" name="current" ></td></tr>
    <tr><td>New Password</td><td><input type="password" name="new"></td></tr>
    <tr><td>Confirm Password</td><td><input type="password" name="confirm"></td></tr>
    <tr><td><input type="submit" value="Change Password"></td></tr>
    </table>
    </form>

    change.jsp there is something wrong here

    <%@page import="java.sql.*"%>
    <%@page import="java.io.*"%>
    <%
    String userid = request.getParameter("uname");
    String pwd=request.getParameter("pass");
    String Newpass=request.getParameter("new");
    String conpass=request.getParameter("confirm");
    String connectionURL = "jdbc:mysql://localhost:3306/users";;;
    Connection con=null;
    String pass="";
    int id=0;
    try{
    Class.forName("com.mysql.jdbc.Driver");
    con = DriverManager.getConnection(connectionURL, "root", "");
    Statement st=con.createStatement();
    ResultSet rs=st.executeQuery("select * from members where pass='" + pwd + "'");
    while(rs.next()){
    id=rs.getInt(1);
    pass=rs.getString(3);
    }
    out.println(userid+ " "+pass);
    if(pwd.equals(conpass)){
    Statement st1=con.createStatement();
    int i=st1.executeUpdate("update members set pass='"+Newpass+"' where uname='"+userid+"'");
    out.println("Password changed successfully");
    st1.close();
    con.close();
    }
    else{
    out.println("Invalid Current Password");
    }
    }
    catch(Exception e){
    out.println(e);
    }
    %>

    logout.jsp
    <%
    session.setAttribute("userid", null);
    session.invalidate();
    response.sendRedirect("index.jsp");
    %>


  2. #2
    Member Ganeprog's Avatar
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    Default Re: log in register & change password jsp. help pls

    Hi,

    First tell me error what error you are facing. How you said change.jsp having error. Please post the error message fully.

    Thanks,

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