【SpringBoot】Eclipseから作成したjarファイルが実行できない

初めて質問します。
不足している情報や不手際がありましたら申し訳ありません。
コメント欄にて確認していただけると幸いです。

前提・実現したいこと

Spring Bootフレームワークを用いて、webアプリケーションを開発しています。
このアプリケーションをjarで吐き出して実行しても動かず困っています。

cmd
1> java -jar example-ver-0.1.jar

将来的には、EC2に乗せて動かしたいと思っています。

開発環境であるEclipse上では動いており、パッケージにする際に何かが足りていないのでは、と考えています。

発生している問題・エラーメッセージ

[main] INFO com.example.exampleApplication - Starting exampleApplication on xxx-001 with PID 13964 (C:\pleiades\workspace\example-ver\build\libs\example-ver-0.1.jar started by xxx in c:\pleiades\workspace\example-ver\build\libs)
[main] DEBUG com.example.exampleApplication - Running with Spring Boot, Spring
[main] INFO com.example.exampleApplication - No active profile set, falling back to default profiles: default
[main] DEBUG org.springframework.boot.SpringApplication - Loading source class com.example.exampleApplication
[main] DEBUG org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext - Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@376b4233
[main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
[main] DEBUG org.springframework.context.annotation.ClassPathBeanDefinitionScanner - Ignored because not a concrete top-level class: URL [jar:file:/C:/pleiades/workspace/example-ver/build/libs/example-ver-0.1.jar!/com/example/domain/repository/XXX_Repository.class]
・・・
[main] DEBUG org.springframework.context.annotation.ClassPathBeanDefinitionScanner - Identified candidate component class: URL [jar:file:/C:/pleiades/workspace/example-ver/build/libs/example-ver-0.1.jar!/com/example/service/XXX_Service.class]
・・・
[main] DEBUG org.springframework.context.annotation.ClassPathBeanDefinitionScanner - Identified candidate component class: URL [jar:file:/C:/pleiades/workspace/example-ver/build/libs/example-ver-0.1.jar!/com/example/web/XXX_Controller.class]
・・・
[main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerProcessor'
[main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerFactory'
[main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
[main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalCommonAnnotationProcessor'
[main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalPersistenceAnnotationProcessor'
[main] DEBUG org.springframework.ui.context.support.UiApplicationContextUtils - Unable to locate ThemeSource with name 'themeSource': using default [org.springframework.ui.context.support.ResourceBundleThemeSource@70e9c95d]
[main] WARN org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.
[main] ERROR org.springframework.boot.SpringApplication - Application run failed
org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:157)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
        at com.example.exampleApplication.main(exampleApplication.java:27)
Caused by: org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.getWebServerFactory(ServletWebServerApplicationContext.java:206)
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:180)
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:154)
        ... 8 common frames omitted

該当のソースコード

メインのクラスは下記のとおりです

java
1
2package com.example;
3
4import org.springframework.boot.SpringApplication;
5import org.springframework.boot.autoconfigure.SpringBootApplication;
6import org.springframework.boot.autoconfigure.domain.EntityScan;
7import org.springframework.boot.builder.SpringApplicationBuilder;
8import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
9
10@SpringBootApplication
11@EntityScan("com.example")
12public class MainApp extends SpringBootServletInitializer {
13
14	@Override
15	protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
16		return application.sources(MainApp.class);
17	}
18
19	public static void main(String[] args) {
20		SpringApplication.run(MainApp.class, args);
21	}
22
23}
24

build.gradle


buildscript {
    ext {
        springBootVersion = '2.1.6.RELEASE'
    }
    repositories {
        mavenCentral()
        jcenter()
        maven { url "https://repo.spring.io/release/" }
        maven { url "https://plugins.gradle.org/m2/" }
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    }
}

plugins {
	id 'java'
	id 'eclipse'

	id 'org.springframework.boot' version '2.1.6.RELEASE'
	id 'io.spring.dependency-management' version '1.0.6.RELEASE'

	id 'jacoco'
	id 'groovy'

	id 'com.github.ben-manes.versions' version '0.14.0'
	id 'com.github.johnrengelman.shadow' version '4.0.2'
}

apply plugin: 'maven'
apply plugin: 'application'

sourceCompatibility = '1.8'
targetCompatibility = '1.8'

wrapper {
    gradleVersion = "5.4"
    distributionType = Wrapper.DistributionType.ALL
}

springBoot {
    buildInfo()
}

group = 'com.example'
version = '0.1'

mainClassName ="com.example.MainApp"
defaultTasks 'shadowJar'


tasks.withType(JavaCompile) {
  options.encoding = 'UTF-8'
}

configurations {
	compileOnly {
		extendsFrom annotationProcessor
	}
}

repositories {
	mavenCentral()
	mavenLocal()
}

dependencies {
	implementation 'org.webjars:jquery:3.4.1'
	implementation 'org.webjars:jquery-ui:1.12.1'
	implementation 'org.webjars:popper.js:1.15.0'
	implementation 'org.webjars:bootstrap:4.1.3'

	implementation 'com.amazonaws:aws-java-sdk:+'

	implementation 'org.springframework.boot:spring-boot-starter-actuator'
	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
	implementation 'org.springframework.boot:spring-boot-starter-web'
//	implementation 'org.springframework.boot:spring-boot-starter-security'

	compileOnly 'org.projectlombok:lombok'
	runtimeOnly 'org.springframework.boot:spring-boot-devtools'
	runtimeOnly 'mysql:mysql-connector-java'
	annotationProcessor 'org.projectlombok:lombok'

	testImplementation 'org.springframework.boot:spring-boot-starter-test'
	testImplementation 'org.springframework.security:spring-security-test'

}

jacoco {
    toolVersion = "0.8.3"
    reportsDir = file("$buildDir/customJacocoReportDir")
}

jacocoTestReport {
    reports {
        xml.enabled false
        csv.enabled false
        html.destination file("${buildDir}/jacocoHtml")
    }
}

shadowJar {
    mergeServiceFiles()
    zip64 true
    exclude 'META-INF/INDEX.LIST'
    exclude 'META-INF/*.SF'
    exclude 'META-INF/*.DSA'
    exclude 'META-INF/*.RSA'
}

jar{
    manifest {
        attributes "Main-Class" : "com.example.MainApp"
    }
}