从Spring Boot切换回“正常” Spring，因为该应用程序仅使用一些jdbc代码来“更新”到Postgresql数据库中。
1）
尝试用以下方法注释测试类：
@RunWith(SpringJUnit4ClassRunner.class)
public class DBIntegration {
results in:
java.lang.IllegalStateException: Failed to load ApplicationContext
2）
尝试通过以下方式为课程添加注释：
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {})
public class DBIntegration {
[main] INFO org.springframework.test.context.support.AbstractContextLoader - Could not detect default resource locations for test class [de.mydomain.myproject.DBIntegration]: no resource found for suffixes {-context.xml}.
No exceptions, but java.lang.Exception: No tests found matching [{ExactMatcher:fDisplayName=insertDataFrom_sometest],
3）尝试通过以下方式注释该类：
@Component
public class DBIntegration {
dependency injection does not work in this case, the expected service
(to be injected) throws a nullpointerexception