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This is my login.jsp page
<%@ page import ="java.sql.*" %>
<%@page import="java.sql.ResultSet"%>
<%@page import="java.sql.Statement"%>
<%@page import="java.sql.Connection"%>
<!DOCTYPE html>
<html>
<style>
/* Full-width input fields */
input[type=text], input[type=password] {
width: 100%;
padding: 12px 20px;
margin: 8px 0;
display: inline-block;
border: 1px solid #ccc;
box-sizing: border-box;
}
/* Set a style for all buttons */
button {
background-color: #4CAF50;
color: white;
padding: 14px 20px;
margin: 8px 0;
border: none;
cursor: pointer;
width: 100%;
}
/* Extra styles for the cancel button */
.cancelbtn {
padding: 14px 20px;
background-color: #f44336;
}
/* Float cancel and signup buttons and add an equal width */
.cancelbtn,.signupbtn {
float: left;
width: 50%;
}
/* Add padding to container elements */
.container {
padding: 16px;
}
/* Clear floats */
.clearfix::after {
content: "";
clear: both;
display: table;
}
/* Change styles for cancel button and signup button on extra small screens */
@media screen and (max-width: 300px) {
.cancelbtn, .signupbtn {
width: 100%;
}
}
</style>
<head>
<meta charset="ISO-8859-1">
<title>Registration Form</title>
</head>
<form method="post" action="success.jsp">
<div class="container">
<h2>Login Form</h2>
<label><b>Username</b></label>
<input type="text" placeholder="Enter Username" name="Username" required>
<label><b>Password</b></label>
<input type="password" placeholder="Enter Password" name="Password" required>
<div class="clearfix">
<button type="submit" value="submit">Login</button>
</div>
</div>
</html>
<%
String Username= request.getParameter("Username");
String Password = request.getParameter("Password");
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/mysql","root","root");
Statement st = con.createStatement();
ResultSet rs;
rs=st.executeQuery("SELECT * FROM customers WHERE Username='" + Username + "' and Password='" + Password + "'");
if (rs.next()) {
session.setAttribute("Username",Username);
// out.println("Welcome " + Username);
//out.println("<a href='logout.jsp'>Log out</a>");
response.sendRedirect("success.jsp");
}
else
{
out.println("Invalid Username or password Please try again");
}
%>
I am using eclipse,tomcat,mysql db.When i run login.jsp page it is asking me validation details and total code works fine but in output page i am getting
O/P:Welcome null.It is throwing me null value.And also it is directly going to else loop and giving me output in the output page like this "Invalid Username or Password Please try again".I used both HTML and java code in jsp file is that correct???
success.jsp:
<%
if ((session.getAttribute("Username") == "null") || (session.getAttribute("Password") =="null")) {
%>
You have not logged in<br/>
<a href="login.jsp">Please Login</a>
<%} else {
%>
Welcome <%=session.getAttribute("Username")%>
<a href='logout.jsp'>Log out</a>
<%
}
%>
欢迎<％= session.getAttribute（ “用户名”）％>
//预期输出欢迎rohan542 所述的login.jsp具有直接从login.jsp的至success.jsp.In它具有直接换句话说从登录页面到成功页面。没有堆栈跟踪，iam获取输出，但不是我期望的。我认为代码有一点点错误，请更正它。我在java中使用会话。代码必须检查是否用户名和密码是正确的，如果他们是正确的，那么它必须验证并进入成功页面，除此之外，我提供了一个注销链接，直接注销那里我的问题是如何从一个jsp页面指向另一个jsp页面？
请帮助任何人。 –