执行java -jar报错Exception in thread “main” java.lang.reflect.InvocationTargetException，这是为什么呢?

InitializrStartApplicationTests.java内容如下：

package com.waylau.spring.boot.blog.initializrstart;

// import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class InitializrStartApplicationTests {

	// @Test
	void contextLoads() {
	}

}

build.gradle内容如下：

plugins {
	id 'org.springframework.boot' version '1.5.2.RELEASE'
	id 'io.spring.dependency-management' version '1.0.9.RELEASE'
	id 'java'
}

group = 'com.waylau.spring.boot.blog'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '1.8'

repositories {
	mavenCentral()
}

dependencies {
	implementation 'org.springframework.boot:spring-boot-starter-web'
	testImplementation('org.springframework.boot:spring-boot-starter-test') {
		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
	}
}

// test {
// 	useJUnitPlatform()
// }