diff --git a/springChatRoom/src/main/resources/static/css/main.css b/springChatRoom/src/main/resources/static/css/main.css
new file mode 100644
index 000000000..384b3cd8b
--- /dev/null
+++ b/springChatRoom/src/main/resources/static/css/main.css
@@ -0,0 +1,298 @@
+* {
+    -webkit-box-sizing: border-box;
+    -moz-box-sizing: border-box;
+    box-sizing: border-box;
+}
+
+html,body {
+    height: 100%;
+    overflow: hidden;
+}
+
+body {
+    margin: 0;
+    padding: 0;
+    font-weight: 400;
+    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+    font-size: 1rem;
+    line-height: 1.58;
+    color: #333;
+    background-color: #f4f4f4;
+    height: 100%;
+}
+
+body:before {
+    height: 50%;
+    width: 100%;
+    position: absolute;
+    top: 0;
+    left: 0;
+    background: #128ff2;
+    content: "";
+    z-index: 0;
+}
+
+.clearfix:after {
+    display: block;
+    content: "";
+    clear: both;
+}
+
+.hidden {
+    display: none;
+}
+
+.form-control {
+    width: 100%;
+    min-height: 38px;
+    font-size: 15px;
+    border: 1px solid #c8c8c8;
+}
+
+.form-group {
+    margin-bottom: 15px;
+}
+
+input {
+    padding-left: 10px;
+    outline: none;
+}
+
+h1, h2, h3, h4, h5, h6 {
+    margin-top: 20px;
+    margin-bottom: 20px;
+}
+
+h1 {
+    font-size: 1.7em;
+}
+
+a {
+    color: #128ff2;
+}
+
+button {
+    box-shadow: none;
+    border: 1px solid transparent;
+    font-size: 14px;
+    outline: none;
+    line-height: 100%;
+    white-space: nowrap;
+    vertical-align: middle;
+    padding: 0.6rem 1rem;
+    border-radius: 2px;
+    transition: all 0.2s ease-in-out;
+    cursor: pointer;
+    min-height: 38px;
+}
+
+button.default {
+    background-color: #e8e8e8;
+    color: #333;
+    box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.12);
+}
+
+button.primary {
+    background-color: #128ff2;
+    box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.12);
+    color: #fff;
+}
+
+button.accent {
+    background-color: #ff4743;
+    box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.12);
+    color: #fff;
+}
+
+#username-page {
+    text-align: center;
+}
+
+.username-page-container {
+    background: #fff;
+    box-shadow: 0 1px 11px rgba(0, 0, 0, 0.27);
+    border-radius: 2px;
+    width: 100%;
+    max-width: 500px;
+    display: inline-block;
+    margin-top: 42px;
+    vertical-align: middle;
+    position: relative;
+    padding: 35px 55px 35px;
+    min-height: 250px;
+    position: absolute;
+    top: 50%;
+    left: 0;
+    right: 0;
+    margin: 0 auto;
+    margin-top: -160px;
+}
+
+.username-page-container .username-submit {
+    margin-top: 10px;
+}
+
+
+#chat-page {
+    position: relative;
+    height: 100%;
+}
+
+.chat-container {
+    max-width: 700px;
+    margin-left: auto;
+    margin-right: auto;
+    background-color: #fff;
+    box-shadow: 0 1px 11px rgba(0, 0, 0, 0.27);
+    margin-top: 30px;
+    height: calc(100% - 60px);
+    max-height: 600px;
+    position: relative;
+}
+
+#chat-page ul {
+    list-style-type: none;
+    background-color: #FFF;
+    margin: 0;
+    overflow: auto;
+    overflow-y: scroll;
+    padding: 0 20px 0px 20px;
+    height: calc(100% - 150px);
+}
+
+#chat-page #messageForm {
+    padding: 20px;
+}
+
+#chat-page ul li {
+    line-height: 1.5rem;
+    padding: 10px 20px;
+    margin: 0;
+    border-bottom: 1px solid #f4f4f4;
+}
+
+#chat-page ul li p {
+    margin: 0;
+}
+
+#chat-page .event-message {
+    width: 100%;
+    text-align: center;
+    clear: both;
+}
+
+#chat-page .event-message p {
+    color: #777;
+    font-size: 14px;
+    word-wrap: break-word;
+}
+
+#chat-page .chat-message {
+    padding-left: 68px;
+    position: relative;
+}
+
+#chat-page .chat-message i {
+    position: absolute;
+    width: 42px;
+    height: 42px;
+    overflow: hidden;
+    left: 10px;
+    display: inline-block;
+    vertical-align: middle;
+    font-size: 18px;
+    line-height: 42px;
+    color: #fff;
+    text-align: center;
+    border-radius: 50%;
+    font-style: normal;
+    text-transform: uppercase;
+}
+
+#chat-page .chat-message span {
+    color: #333;
+    font-weight: 600;
+}
+
+#chat-page .chat-message p {
+    color: #43464b;
+}
+
+#messageForm .input-group input {
+    float: left;
+    width: calc(100% - 85px);
+}
+
+#messageForm .input-group button {
+    float: left;
+    width: 80px;
+    height: 38px;
+    margin-left: 5px;
+}
+
+.chat-header {
+    text-align: center;
+    padding: 15px;
+    border-bottom: 1px solid #ececec;
+}
+
+.chat-header h2 {
+    margin: 0;
+    font-weight: 500;
+}
+
+.connecting {
+    padding-top: 5px;
+    text-align: center;
+    color: #777;
+    position: absolute;
+    top: 65px;
+    width: 100%;
+}
+
+
+@media screen and (max-width: 730px) {
+
+    .chat-container {
+        margin-left: 10px;
+        margin-right: 10px;
+        margin-top: 10px;
+    }
+}
+
+@media screen and (max-width: 480px) {
+    .chat-container {
+        height: calc(100% - 30px);
+    }
+
+    .username-page-container {
+        width: auto;
+        margin-left: 15px;
+        margin-right: 15px;
+        padding: 25px;
+    }
+
+    #chat-page ul {
+        height: calc(100% - 120px);
+    }
+
+    #messageForm .input-group button {
+        width: 65px;
+    }
+
+    #messageForm .input-group input {
+        width: calc(100% - 70px);
+    }
+
+    .chat-header {
+        padding: 10px;
+    }
+
+    .connecting {
+        top: 60px;
+    }
+
+    .chat-header h2 {
+        font-size: 1.1em;
+    }
+}
\ No newline at end of file
diff --git a/springChatRoom/src/main/resources/static/index.html b/springChatRoom/src/main/resources/static/index.html
new file mode 100644
index 000000000..e2974a07e
--- /dev/null
+++ b/springChatRoom/src/main/resources/static/index.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+
+<!--
+Ref
+- https://www.callicoder.com/spring-boot-websocket-chat-example/
+- https://blog.csdn.net/qqxx6661/article/details/98883166
+-->
+<html>
+<head>
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0">
+    <title>Spring Boot WebSocket Chat Application</title>
+    <link rel="stylesheet" href="/css/main.css" />
+</head>
+<body>
+<noscript>
+    <h2>Sorry! Your browser doesn't support Javascript</h2>
+</noscript>
+
+<div id="username-page">
+    <div class="username-page-container">
+        <h1 class="title">Type your username</h1>
+        <form id="usernameForm" name="usernameForm">
+            <div class="form-group">
+                <input type="text" id="name" placeholder="Username" autocomplete="off" class="form-control" />
+            </div>
+            <div class="form-group">
+                <button type="submit" class="accent username-submit">Start Chatting</button>
+            </div>
+        </form>
+    </div>
+</div>
+
+<div id="chat-page" class="hidden">
+    <div class="chat-container">
+        <div class="chat-header">
+            <h2>Spring WebSocket Chat Demo</h2>
+        </div>
+        <div class="connecting">
+            Connecting...
+        </div>
+        <ul id="messageArea">
+
+        </ul>
+        <form id="messageForm" name="messageForm">
+            <div class="form-group">
+                <div class="input-group clearfix">
+                    <input type="text" id="message" placeholder="Type a message..." autocomplete="off" class="form-control"/>
+                    <button type="submit" class="primary">Send</button>
+                </div>
+            </div>
+        </form>
+    </div>
+</div>
+
+<script src="https://cdnjs.cloudflare.com/ajax/libs/sockjs-client/1.1.4/sockjs.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/stomp.js/2.3.3/stomp.min.js"></script>
+<script src="/js/main.js"></script>
+</body>
+</html>
\ No newline at end of file
diff --git a/springChatRoom/src/main/resources/static/js/main.js b/springChatRoom/src/main/resources/static/js/main.js
new file mode 100644
index 000000000..14f12e5c1
--- /dev/null
+++ b/springChatRoom/src/main/resources/static/js/main.js
@@ -0,0 +1,122 @@
+'use strict';
+
+// Ref
+// - https://www.callicoder.com/spring-boot-websocket-chat-example/
+// - https://blog.csdn.net/qqxx6661/article/details/98883166
+
+var usernamePage = document.querySelector('#username-page');
+var chatPage = document.querySelector('#chat-page');
+var usernameForm = document.querySelector('#usernameForm');
+var messageForm = document.querySelector('#messageForm');
+var messageInput = document.querySelector('#message');
+var messageArea = document.querySelector('#messageArea');
+var connectingElement = document.querySelector('.connecting');
+
+var stompClient = null;
+var username = null;
+
+var colors = [
+    '#2196F3', '#32c787', '#00BCD4', '#ff5652',
+    '#ffc107', '#ff85af', '#FF9800', '#39bbb0'
+];
+
+function connect(event) {
+    username = document.querySelector('#name').value.trim();
+
+    if(username) {
+        usernamePage.classList.add('hidden');
+        chatPage.classList.remove('hidden');
+
+        var socket = new SockJS('/ws');
+        stompClient = Stomp.over(socket);
+
+        stompClient.connect({}, onConnected, onError);
+    }
+    event.preventDefault();
+}
+
+
+function onConnected() {
+    // Subscribe to the Public Topic
+    stompClient.subscribe('/topic/public', onMessageReceived);
+
+    // Tell your username to the server
+    stompClient.send("/app/chat.addUser",
+        {},
+        JSON.stringify({sender: username, type: 'JOIN'})
+    )
+
+    connectingElement.classList.add('hidden');
+}
+
+
+function onError(error) {
+    connectingElement.textContent = 'Could not connect to WebSocket server. Please refresh this page to try again!';
+    connectingElement.style.color = 'red';
+}
+
+
+function sendMessage(event) {
+    var messageContent = messageInput.value.trim();
+    if(messageContent && stompClient) {
+        var chatMessage = {
+            sender: username,
+            content: messageInput.value,
+            type: 'CHAT'
+        };
+        stompClient.send("/app/chat.sendMessage", {}, JSON.stringify(chatMessage));
+        messageInput.value = '';
+    }
+    event.preventDefault();
+}
+
+
+function onMessageReceived(payload) {
+    var message = JSON.parse(payload.body);
+
+    var messageElement = document.createElement('li');
+
+    if(message.type === 'JOIN') {
+        messageElement.classList.add('event-message');
+        message.content = message.sender + ' joined!';
+    } else if (message.type === 'LEAVE') {
+        messageElement.classList.add('event-message');
+        message.content = message.sender + ' left!';
+    } else {
+        messageElement.classList.add('chat-message');
+
+        var avatarElement = document.createElement('i');
+        var avatarText = document.createTextNode(message.sender[0]);
+        avatarElement.appendChild(avatarText);
+        avatarElement.style['background-color'] = getAvatarColor(message.sender);
+
+        messageElement.appendChild(avatarElement);
+
+        var usernameElement = document.createElement('span');
+        var usernameText = document.createTextNode(message.sender);
+        usernameElement.appendChild(usernameText);
+        messageElement.appendChild(usernameElement);
+    }
+
+    var textElement = document.createElement('p');
+    var messageText = document.createTextNode(message.content);
+    textElement.appendChild(messageText);
+
+    messageElement.appendChild(textElement);
+
+    messageArea.appendChild(messageElement);
+    messageArea.scrollTop = messageArea.scrollHeight;
+}
+
+
+function getAvatarColor(messageSender) {
+    var hash = 0;
+    for (var i = 0; i < messageSender.length; i++) {
+        hash = 31 * hash + messageSender.charCodeAt(i);
+    }
+    var index = Math.abs(hash % colors.length);
+    return colors[index];
+}
+
+usernameForm.addEventListener('submit', connect, true)
+messageForm.addEventListener('submit', sendMessage, true)
\ No newline at end of file