Junit写法及与spring整合过程详解

//在Before中注入service类
private IUserService userService;
  @Before
public void setUp() throws Exception {
//使用xml的方式
　　ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
//使用注解的方式
　　ApplicationContext applicationContext = new AnnotationConfigApplicationContext(SpringConfiguration.class);
userService = applicationContext.getBean(IUserService.class);
 }

<dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-test</artifactId>
   <version>4.3.3.RELEASE</version>
</dependency>

//测试类运行的环境，在spring环境下运行，在测试类, 注入Spring容器的bean
@RunWith(SpringJUnit4ClassRunner.class)
//在创建spring容器时，指定加载哪个配置文件 - - 相当于之前的手动获取对象
@ContextConfiguration("classpath:applicationContext.xml")
public class UserServiceImplTest {

  @Autowired //注入IUserService
  private IUserService userService;
  
  @Test
  public void testFindUserById() {
    userService.findUserById(2);
  }