1、添加maven依赖

        <!-- 添加test方便测试-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.junit.platform</groupId>
            <artifactId>junit-platform-launcher</artifactId>
            <version>1.8.2</version>
            <scope>test</scope>
        </dependency>

2、测试代码

import org.junit.Test;

public class MyServiceTest2 {

    @Test
    public void testMyService() {
        System.out.println ("测试！！！" );
    }
}