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Java Intro to Java Web Development with Spark Diving into Web Development Accepting Requests

Posted by Lee Haney
Lee Haney
395 Points

When I type in my user name and click the "Sign in" button, all it says is "Welcome !". No user name.

When I type in my user name and click the "Sign in" button, all it says is "Welcome !". The username is not displaying.

Here is my Main.java file: 

package com.teamtreehouse.courses;

import java.util.HashMap;
import java.util.Map;

import spark.ModelAndView;
import spark.template.handlebars.HandlebarsTemplateEngine; 
import static spark.Spark.*;

public class Main {
    public static void main(String[] args) {

        get("/", (req, res) -> {
            return new ModelAndView(null, "index.hbs");
        }, new HandlebarsTemplateEngine());

        post("/sign-in", (req, res) -> {
            Map<String, String> model = new HashMap<>();
            model.put("username", req.queryParams("username") );
            return new ModelAndView(null, "sign-in.hbs");
        }, new HandlebarsTemplateEngine());
    }
}

Here is my index.hbs file: 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Hello Students</title>
</head>
<body>
    <h1>Welcome Students!</h1>
    <!-- To do: Add sign in -->
    <form action="/sign-in" method="post">
        <input type="text" placeholder="What's your user name?" name="username" >
        <button>Sign in</button>
    </form>
</body>
</html>

sign-in.hbs file:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Signed In</title>
</head>
<body>
    <p>Welcome {{username}} !</p>
</body>
</html>

1 Answer

Lee Haney
Lee Haney
395 Points
Lee Haney
Lee Haney
395 Points

Never mind I figured it out. The problem was in the Main.java file. Instead of doing this: 

post("/sign-in", (req, res) -> {
            Map<String, String> model = new HashMap<>();
            model.put("username", req.queryParams("username") );
            return new ModelAndView(model, "sign-in.hbs");
        }, new HandlebarsTemplateEngine());

I had this:

post("/sign-in", (req, res) -> {
            Map<String, String> model = new HashMap<>();
            model.put("username", req.queryParams("username") );
            return new ModelAndView(null, "sign-in.hbs");
        }, new HandlebarsTemplateEngine());