How do retrieve vales from HTML Post method to Java with freemarker?
Question
I am trying to create a simple registration form and insert the data from the user into mongodb.
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Sign Up</title>
<link href="/css/main.css" rel="stylesheet">
</head>
<body>
<h2>Sign Up</h2>
<#if user?? >
Your submitted data<br>
Name: ${user.user_id}<br>
Password: ${user.password}<br>
Email: ${user.email}<br>
<#else>
<form action="/form" method="post">
First name:<br>
<input type="text" name="Name">
<br><br>
Pasword:<br>
<input type="text" name="password">
<br><br>
Email:<br>
<input type="text" name="email">
<br><br>
<input type="submit" value="Submit">
</form>
</#if>
<script src="/js/main.js"></script>
</body>
</html>
I have a User class, and I want to create an instance of it, to fetch the data and insert it to mongodb. This is the part I don't know how to do. How do I create the controller to pass the data from HTML to the User instance?
This is what I have so far -
//sign up page
Spark.get(new Route("signup") {
@Override
public Object handle(Request request, Response response) {
StringWriter writer = new StringWriter();
User user = new User(); // create user to fetch results
try{
Template signupTemplate = configuration.getTemplate("signup.ftl");
}catch (Exception e){
e.printStackTrace();
}
}
});
}
How do I go on from here? Can I do that only with freemarker and sparkjava ?
1 answers
solution1
1 2018-11-26 21:11:19
To post form data to server, you should define a spark route to listen for POST method.
A spark route comprises of three entities ( see doc's ),
- verb: get, post, put, delete etc.
- path: Request path for which the Route applies
- callback: Handler class that will be invoked when the incoming request matches the path.
In your case it should be,
Spark.post("/form", new Route() {
@Override
public Object handle(Request request, Response response) {
// process request and return response
}
});
If your working with Java 8, you could simplify the above,
Spark.post("/form", (request, response) -> {
// process request and return response
});
Now to read form data, you could do so by fetching the raw request( HttpServletRequest ) and using getParameter() inside the handle method.
HttpServletRequest httpRequest = request.raw();
String name = httpRequest.getParameter("Name");
String email = httpRequest.getParameter("email");
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