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@RestController
public class LoginController {

@RequestMapping(value = "/submit", method = RequestMethod.POST)
public String check()
{
    System.out.println("dghad");
    return "hello";


}
}

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"    "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Login</title>
</head>
<body>
<form method="post" action="submit">
    Username : <input type="text" name="username"> <br> <br>
    Password : <input type="text" name="password" /> <br> <br>
    <input type="submit" value="Submit" />
</form>

@SpringBootApplication
public class Application extends SpringBootServletInitializer{

public static void main(String[] args) {
    System.out.println("in main");
    SpringApplication.run(Application.class, args);
 }

@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder  builder) {
    // TODO Auto-generated method stub
    return super.configure(builder);
}


}