在测试类中,每个测试方法都有以下两行代码:
ApplicationContext context = new ClassPathXmlApplicationContext("applicationcontext"); UserServer userServer = context.getBean("userServer",UserServer.class);
这两行代码的作用是获取容器,如果不写的话,直接回提示空指针异常。
让SpringJunit负责创建Spring容器,但是需要将配置文件给它
将需要进行测试的Bean直接在测试类中进行注入
<!--此处需要注意的是,spring5 及以上版本要求 junit 的版本必须是 4.12 及以上--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency>
@RunWith(SpringJUnit4ClassRunner.class) public class SpringJunitTest { }
@RunWith(SpringJUnit4ClassRunner.class) //加载spring核心配置文件 //@ContextConfiguration(value = {"classpath:applicationContext.xml"}) //加载spring核心配置类 @ContextConfiguration(classes = {SpringConfiguration.class}) public class SpringJunitTest { }
@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(classes = {SpringConfiguration.class}) public class SpringJunitTest { @Autowired private UserService userService; }
@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(classes = {SpringConfiguration.class}) public class SpringJunitTest { @Autowired private UserService userService; @Test public void testUserService(){ userService.save(); } }