Spring Boot not updating static html (with Kotlin/Intellij) - spring-boot

Question

I built a pretty simple static content web server using Spring Boot, Kotlin and Intellij. I run my program and it properly serves my html on localhost:8080. However, if I update that html while the server is running then force reload the page in the browser my changes are never shown. I've read a bunch of things that could be the problem. Something about thymeleaf cache. Spring Boot Devtools. Intellij auto builds or something. Nothing seems to work. Maybe an extra set of eyes on my code could pick up something I'm missing.
Here's my build.gradle
buildscript {
ext.kotlin_version = "1.2.0"
ext.httpcomponents_version = "4.5.4"
ext.springframework_version = "1.5.9.RELEASE"
repositories {
mavenCentral()
}
dependencies {
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
classpath "org.springframework.boot:spring-boot-gradle-plugin:$springframework_version"
}
}
group "com.atomicslurry"
version "1.0"
apply plugin: "java"
apply plugin: "kotlin"
apply plugin: "spring-boot"
sourceCompatibility = 1.8
repositories {
mavenCentral()
}
dependencies {
compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
compile "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
compile "org.apache.httpcomponents:httpclient:$httpcomponents_version"
compile "org.apache.httpcomponents:fluent-hc:$httpcomponents_version"
compile "com.fasterxml.jackson.module:jackson-module-kotlin:2.9.2"
compile "org.springframework.boot:spring-boot-starter-thymeleaf:$springframework_version"
compile "org.springframework.boot:spring-boot-devtools:$springframework_version"
testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"
}
compileKotlin {
kotlinOptions.jvmTarget = "1.8"
}
compileTestKotlin {
kotlinOptions.jvmTarget = "1.8"
}
Here's my kotlin app main
package com.atomicslurry.sentinel
import org.springframework.boot.SpringApplication
import org.springframework.boot.autoconfigure.SpringBootApplication
#SpringBootApplication
open class App
fun main(args: Array<String>) {
SpringApplication.run(App::class.java, *args)
}
Finally, my static html is in src/main/resources/static
Any ideas?

Answer 1

The general workflow that is working for me:
Edit HTML
Press Build Project (Ctr+F9) in IntelliJ, then wait until changes completed
Go to Browser and refresh

Answer 2

add this lines to application.properties
spring.web.resources.static-locations[0]=file:./src/main/resources/public/
spring.web.resources.static-locations[1]=classpath:/public/

Answer 3

If you're using Spring Boot with static resources at src/main/resources/public, this can be done by add the following to application.properties:
spring.web.resources.static-locations[0]=file:src/main/resources/public/
spring.web.resources.static-locations[1]=classpath:/public/
The "file:" makes the content update on refreshing the browser,
see related issue.
Alternatively, the file resource locations can be discovered at runtime and added programmatically.
See also documentation and tutorial.