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Spring Framework 5: Beginner to Guru

This repository is for an example application built in my Spring Framework 5 - Beginner to Guru online course

The application is a simple Spring Boot 2 / Spring Framework 5 web application. It is used to help students learn how to use the Spring Framework. Step by step instructions and detailed explanations can be found within the course.

As you work through the course, please feel free to fork this repository to your out GitHub repo. Most links contain links to source code changes. If you encounter a problem you can compare your code to the lesson code. See this link for help with compares

Spring Framework 5: Beginner to Guru Course Wiki

Got a question about your Spring Framework 5 course? Checkout these FAQs!

Getting Your Development Environment Setup

Recommended Versions

RecommendedReferenceNotes
Oracle Java 11 JDKDownloadJava 8 or Java 17 may also be used.
IntelliJ 2018 or HigherDownloadUltimate Edition recommended. Students can get a free 120 trial license here
Maven 3.6.0 or higherDownloadInstallation Instructions
Gradle 4.8 or higherDownloadNote: Use Version 5 or higher if using Java 11
Git 2.15 or higherDownload
Git GUI ClientsDownloadsNot required. But can be helpful if new to Git. SourceTree is a good option for Mac and Windows users.
Spring Boot 2.1 or higherWhat's new

All Spring Framework Guru Courses

Spring Framework 5

SQL

DevOps

Web Development with Spring Framework

Connect with Spring Framework Guru

  • Spring Framework Guru Blog
  • Subscribe to Spring Framework Guru on YouTube
  • Like Spring Framework Guru on Facebook
  • Follow Spring Framework Guru on Twitter
  • Connect with John Thompson on LinkedIn

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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Spring Framework 5: Beginner to Guru
This repository is for an example application built in my Spring Framework 5 - Beginner to Guru online course
The application is a simple Spring Boot 2 / Spring Framework 5 web application. It is used to help students learn how
to use the Spring Framework. Step by step instructions and detailed explanations can be found within the course.
As you work through the course, please feel free to fork this repository to your out GitHub repo. Most links contain links
to source code changes. If you encounter a problem you can compare your code to the lesson code. See this link for help with compares
Spring Framework 5: Beginner to Guru Course Wiki
Got a question about your Spring Framework 5 course? Checkout these FAQs!
Getting Your Development Environment Setup
Recommended Versions
RecommendedReferenceNotes
Oracle Java 11 JDKDownloadJava 8 or Java 17 may also be used.
IntelliJ 2018 or HigherDownloadUltimate Edition recommended. Students can get a free 120 trial license here
Maven 3.6.0 or higherDownloadInstallation Instructions
Gradle 4.8 or higherDownloadNote: Use Version 5 or higher if using Java 11
Git 2.15 or higherDownload
Git GUI ClientsDownloadsNot required. But can be helpful if new to Git. SourceTree is a good option for Mac and Windows users.
Spring Boot 2.1 or higherWhat's new
All Spring Framework Guru Courses
Spring Framework 5
SQL
DevOps
Web Development with Spring Framework
Connect with Spring Framework Guru
  • Spring Framework Guru Blog
  • Subscribe to Spring Framework Guru on YouTube
  • Like Spring Framework Guru on Facebook
  • Follow Spring Framework Guru on Twitter
  • Connect with John Thompson on LinkedIn
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Example Spring 5 Web Application
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Spring Framework 5: Beginner to Guru
This repository is for an example application built in my Spring Framework 5 - Beginner to Guru online course
The application is a simple Spring Boot 2 / Spring Framework 5 web application. It is used to help students learn how
to use the Spring Framework. Step by step instructions and detailed explanations can be found within the course.
As you work through the course, please feel free to fork this repository to your out GitHub repo. Most links contain links
to source code changes. If you encounter a problem you can compare your code to the lesson code. See this link for help with compares
Spring Framework 5: Beginner to Guru Course Wiki
Got a question about your Spring Framework 5 course? Checkout these FAQs!
Getting Your Development Environment Setup
Recommended Versions
RecommendedReferenceNotes
Oracle Java 11 JDKDownloadJava 8 or Java 17 may also be used.
IntelliJ 2018 or HigherDownloadUltimate Edition recommended. Students can get a free 120 trial license here
Maven 3.6.0 or higherDownloadInstallation Instructions
Gradle 4.8 or higherDownloadNote: Use Version 5 or higher if using Java 11
Git 2.15 or higherDownload
Git GUI ClientsDownloadsNot required. But can be helpful if new to Git. SourceTree is a good option for Mac and Windows users.
Spring Boot 2.1 or higherWhat's new
All Spring Framework Guru Courses
Spring Framework 5
SQL
DevOps
Web Development with Spring Framework
Connect with Spring Framework Guru
  • Spring Framework Guru Blog
  • Subscribe to Spring Framework Guru on YouTube
  • Like Spring Framework Guru on Facebook
  • Follow Spring Framework Guru on Twitter
  • Connect with John Thompson on LinkedIn
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Example Spring 5 Web Application
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Spring Framework 5: Beginner to Guru
This repository is for an example application built in my Spring Framework 5 - Beginner to Guru online course
The application is a simple Spring Boot 2 / Spring Framework 5 web application. It is used to help students learn how
to use the Spring Framework. Step by step instructions and detailed explanations can be found within the course.
As you work through the course, please feel free to fork this repository to your out GitHub repo. Most links contain links
to source code changes. If you encounter a problem you can compare your code to the lesson code. See this link for help with compares
Spring Framework 5: Beginner to Guru Course Wiki
Got a question about your Spring Framework 5 course? Checkout these FAQs!
Getting Your Development Environment Setup
Recommended Versions
RecommendedReferenceNotes
Oracle Java 11 JDKDownloadJava 8 or Java 17 may also be used.
IntelliJ 2018 or HigherDownloadUltimate Edition recommended. Students can get a free 120 trial license here
Maven 3.6.0 or higherDownloadInstallation Instructions
Gradle 4.8 or higherDownloadNote: Use Version 5 or higher if using Java 11
Git 2.15 or higherDownload
Git GUI ClientsDownloadsNot required. But can be helpful if new to Git. SourceTree is a good option for Mac and Windows users.
Spring Boot 2.1 or higherWhat's new
All Spring Framework Guru Courses
Spring Framework 5
SQL
DevOps
Web Development with Spring Framework
Connect with Spring Framework Guru
  • Spring Framework Guru Blog
  • Subscribe to Spring Framework Guru on YouTube
  • Like Spring Framework Guru on Facebook
  • Follow Spring Framework Guru on Twitter
  • Connect with John Thompson on LinkedIn
About
Example Spring 5 Web Application
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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Spring Framework 5: Beginner to Guru
This repository is for an example application built in my Spring Framework 5 - Beginner to Guru online course
The application is a simple Spring Boot 2 / Spring Framework 5 web application. It is used to help students learn how
to use the Spring Framework. Step by step instructions and detailed explanations can be found within the course.
As you work through the course, please feel free to fork this repository to your out GitHub repo. Most links contain links
to source code changes. If you encounter a problem you can compare your code to the lesson code. See this link for help with compares
Spring Framework 5: Beginner to Guru Course Wiki
Got a question about your Spring Framework 5 course? Checkout these FAQs!
Getting Your Development Environment Setup
Recommended Versions
RecommendedReferenceNotes
Oracle Java 11 JDKDownloadJava 8 or Java 17 may also be used.
IntelliJ 2018 or HigherDownloadUltimate Edition recommended. Students can get a free 120 trial license here
Maven 3.6.0 or higherDownloadInstallation Instructions
Gradle 4.8 or higherDownloadNote: Use Version 5 or higher if using Java 11
Git 2.15 or higherDownload
Git GUI ClientsDownloadsNot required. But can be helpful if new to Git. SourceTree is a good option for Mac and Windows users.
Spring Boot 2.1 or higherWhat's new
All Spring Framework Guru Courses
Spring Framework 5
SQL
DevOps
Web Development with Spring Framework
Connect with Spring Framework Guru
  • Spring Framework Guru Blog
  • Subscribe to Spring Framework Guru on YouTube
  • Like Spring Framework Guru on Facebook
  • Follow Spring Framework Guru on Twitter
  • Connect with John Thompson on LinkedIn
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Example Spring 5 Web Application
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Spring Framework 5: Beginner to Guru
This repository is for an example application built in my Spring Framework 5 - Beginner to Guru online course
The application is a simple Spring Boot 2 / Spring Framework 5 web application. It is used to help students learn how
to use the Spring Framework. Step by step instructions and detailed explanations can be found within the course.
As you work through the course, please feel free to fork this repository to your out GitHub repo. Most links contain links
to source code changes. If you encounter a problem you can compare your code to the lesson code. See this link for help with compares
Spring Framework 5: Beginner to Guru Course Wiki
Got a question about your Spring Framework 5 course? Checkout these FAQs!
Getting Your Development Environment Setup
Recommended Versions
RecommendedReferenceNotes
Oracle Java 11 JDKDownloadJava 8 or Java 17 may also be used.
IntelliJ 2018 or HigherDownloadUltimate Edition recommended. Students can get a free 120 trial license here
Maven 3.6.0 or higherDownloadInstallation Instructions
Gradle 4.8 or higherDownloadNote: Use Version 5 or higher if using Java 11
Git 2.15 or higherDownload
Git GUI ClientsDownloadsNot required. But can be helpful if new to Git. SourceTree is a good option for Mac and Windows users.
Spring Boot 2.1 or higherWhat's new
All Spring Framework Guru Courses
Spring Framework 5
SQL
DevOps
Web Development with Spring Framework
Connect with Spring Framework Guru
  • Spring Framework Guru Blog
  • Subscribe to Spring Framework Guru on YouTube
  • Like Spring Framework Guru on Facebook
  • Follow Spring Framework Guru on Twitter
  • Connect with John Thompson on LinkedIn
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Example Spring 5 Web Application
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Spring Framework 5: Beginner to Guru
This repository is for an example application built in my Spring Framework 5 - Beginner to Guru online course
The application is a simple Spring Boot 2 / Spring Framework 5 web application. It is used to help students learn how
to use the Spring Framework. Step by step instructions and detailed explanations can be found within the course.
As you work through the course, please feel free to fork this repository to your out GitHub repo. Most links contain links
to source code changes. If you encounter a problem you can compare your code to the lesson code. See this link for help with compares
Spring Framework 5: Beginner to Guru Course Wiki
Got a question about your Spring Framework 5 course? Checkout these FAQs!
Getting Your Development Environment Setup
Recommended Versions
RecommendedReferenceNotes
Oracle Java 11 JDKDownloadJava 8 or Java 17 may also be used.
IntelliJ 2018 or HigherDownloadUltimate Edition recommended. Students can get a free 120 trial license here
Maven 3.6.0 or higherDownloadInstallation Instructions
Gradle 4.8 or higherDownloadNote: Use Version 5 or higher if using Java 11
Git 2.15 or higherDownload
Git GUI ClientsDownloadsNot required. But can be helpful if new to Git. SourceTree is a good option for Mac and Windows users.
Spring Boot 2.1 or higherWhat's new
All Spring Framework Guru Courses
Spring Framework 5
SQL
DevOps
Web Development with Spring Framework
Connect with Spring Framework Guru
  • Spring Framework Guru Blog
  • Subscribe to Spring Framework Guru on YouTube
  • Like Spring Framework Guru on Facebook
  • Follow Spring Framework Guru on Twitter
  • Connect with John Thompson on LinkedIn
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Example Spring 5 Web Application
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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Spring Framework 5: Beginner to Guru
This repository is for an example application built in my Spring Framework 5 - Beginner to Guru online course
The application is a simple Spring Boot 2 / Spring Framework 5 web application. It is used to help students learn how
to use the Spring Framework. Step by step instructions and detailed explanations can be found within the course.
As you work through the course, please feel free to fork this repository to your out GitHub repo. Most links contain links
to source code changes. If you encounter a problem you can compare your code to the lesson code. See this link for help with compares
Spring Framework 5: Beginner to Guru Course Wiki
Got a question about your Spring Framework 5 course? Checkout these FAQs!
Getting Your Development Environment Setup
Recommended Versions
RecommendedReferenceNotes
Oracle Java 11 JDKDownloadJava 8 or Java 17 may also be used.
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Gradle 4.8 or higherDownloadNote: Use Version 5 or higher if using Java 11
Git 2.15 or higherDownload
Git GUI ClientsDownloadsNot required. But can be helpful if new to Git. SourceTree is a good option for Mac and Windows users.
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Example Spring 5 Web Application
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