Auto-reload After Thymeleaf Source Changes

Let's set up spring-devtools together and develop comfortably

Overview

While implementing CRUD with Spring Boot, I modified Thymeleaf code (.html), but it wasn't reflected immediately and I had to restart to see the changes.
Why aren't the changes reflected right away?

Reason

Thymeleaf caches rendered pages for performance improvement.
And even if the template is changed, it doesn't reload, so even when you modify the template, the changes aren't reflected immediately.

What to do?

In development, you can disable Thymeleaf's cache option.
Add the following property to application.yml.

spring:
  thymeleaf:
    cache: false

DevTools Introduction

While we're at it, let's make it detect Java source changes and rebuild automatically.
Spring Boot provides a great library called 'devtools'.

DevTools Installation

Add gradle dependency

dependencies {
  compileOnly 'org.springframework.boot:spring-boot-devtools'
}

Modify application.yml

spring:
  devtools:
    livereload:
      enabled: true
    restart:
      enabled: true

Eclipse Settings Change

Enable Project > Build Automatically in the Eclipse top toolbar.

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