1. 使用maven构建SpringBoot的名叫spring-boot-test项目

2. pom.xml 

<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

	<modelVersion>4.0.0</modelVersion>
	<groupId>com.bjbs</groupId>
	<artifactId>spring-boot-test</artifactId>
	<version>0.0.1-SNAPSHOT</version>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.13.RELEASE</version>
	</parent>

	<!-- 修改jdk版本 -->
	<properties>
		<java.version>1.8</java.version>
		<!-- 指定thymeleaf和thymeleaf-layout-dialect高版本可以防止html标签不规范报错 -->
		<thymeleaf.version>3.0.2.RELEASE</thymeleaf.version>
		<thymeleaf-layout-dialect.version>2.0.4</thymeleaf-layout-dialect.version>
	</properties>

	<dependencies>
		<!-- springBoot的启动器 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<!-- 添加junit环境的jar包 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
		</dependency>
	</dependencies>
</project>

3. 新建UserDaoImpl.java

package com.bjbs.dao;

import org.springframework.stereotype.Repository;

@Repository
public class UserDaoImpl {
	public void saveUser() {
		System.out.println("insert into users......");
	}
}

4. 新建UserServiceImpl.java

package com.bjbs.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.bjbs.dao.UserDaoImpl;

@Service
public class UserServiceImpl {
	@Autowired
	private UserDaoImpl userDaoImpl;

	public void addUser() {
		this.userDaoImpl.saveUser();
	}
}

5. 新建App.java

package com.bjbs;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * SpringBoot启动类
 */
@SpringBootApplication
public class App {
	public static void main(String[] args) {
		SpringApplication.run(App.class, args);
	}
}

6. 在src/test/java下, 新建UserServiceTest.java单元测试类

package com.bjbs.test;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import com.bjbs.App;
import com.bjbs.service.UserServiceImpl;

/**
 *SpringBoot测试类
 *@RunWith: 启动器 
 *SpringJUnit4ClassRunner.class: 让junit与spring环境进行整合
 *
 *@SpringBootTest(classes={App.class}) 1. 当前类为SpringBoot的测试类
 *@SpringBootTest(classes={App.class}) 2. 加载SpringBoot启动类。
 *
 *junit与spring整合 @Contextconfiguartion("classpath:applicationContext.xml")
 */
@RunWith(SpringJUnit4ClassRunner.class) 
@SpringBootTest(classes={App.class})
public class UserServiceTest {
	@Autowired
	private UserServiceImpl userServiceImpl;
	
	@Test
	public void testAddUser(){
		this.userServiceImpl.addUser();
	}
}

7. 选择单元测试方法名称, Run As-->Junit Test

8. 运行结果