会出现的报错：
java.lang.NoClassDefFoundError: org/junit/runner/manipulation/Filter

java.lang.TypeNotPresentException: Type org.springframework.test.context.junit4.SpringRunner not present
Caused by: java.lang.ClassNotFoundException: org.springframework.test.context.junit4.SpringRunner

这是要把test注释掉，才会有完整的包导入：
gradle：

	//test与junit配合测试  testImplementation改为implementation
	implementation 'org.springframework.boot:spring-boot-starter-test'

	//junit testImplementation下载的包不完整 用implementation下载
	implementation 'junit:junit:4.12'

maven：

	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-test</artifactId>
		<version>1.5.9.RELEASE</version>
		<!--<scope>test</scope>-->
	</dependency>
	<dependency>
		<groupId>junit</groupId>
		<artifactId>junit</artifactId>
		<version>4.12</version>
		<!--<scope>test</scope>-->
	</dependency>