IntelliJ IDEA is showing errors when I use Spring's @Autowired annotation in the class, but the class is functioning without any problem.
Here is this error message:
Autowired members must be defined in the valid spring bean (@Component/@Service,etc.) less... (Ctrl+F1) Checks autowiring problems in a bean class.
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The error displayed refers to cases when you are trying to @Autowire a valid @Bean into a class that is not itself a valid Spring @Bean.
FIRST, make sure that the class into which you are trying to autowire the Bean, is a valid Spring Bean by annotating it with the relevant Spring Stereotype: @Component, or a specialization of it, like @Controller, @Repository, or @Service. According to the Spring Framework documentation (see here) a class annotated with the @Component or any specialization of it, are:
[...] considered as candidates for auto-detection when using annotation-based configuration and classpath scanning.
In some cases it might happen that IntelliJ Spring plugin is unable to resolve the dependency tree. If you are sure that it is the IDE that is messing things up, you can try to:
.idea folder in the local repository, then go to File -> Invalidate Caches and reload the project
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Make sure you have your Spring bean definitions correct. Sometimes, the application works fine, it just displays an error in the IDE, check your project ‘iml’ file if you have a Spring facet defined.
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I might be a little late, but after spending hours and researching on this issue.
I found out that in the latest version IntelliJ 2020 @AutoWired is optional and constructor based depedency injection is preferable.
I solved the problem by simply removing the @AutoWired Annotation from Service and Controller class and using constructor based dependency injection.
This link might help.
Happy Coding!
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in my case I was missing to write in web.xml:
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:applicationContext.xml</param-value>
</context-param>
and in the application context file:
<context:component-scan base-package=[your package name] />
after add this tags and run maven to rebuild project the autowired error in intellj desapears and the bean icon appears in the left margin:
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I fixed it by adding the supress warning:
@SuppressWarnings("SpringJavaInjectionPointsAutowiringInspection")
@Autowired
private ....
The following worked for me:
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I had this problem too. Doing alt+enter and then asking to either re-run or disable Spring inspection on the effected line fixed it. This only seems to have become an issue after the 13.4 update.
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I know this is an old question, but I haven't come across any answers that solved this problem for me so I'll provide my solution.
Note: I thought the issue may have been this, but my issue wasn't related to implementing the same interface twice. Using @Qualitier did make my issue go away, but it was a bandage and not a proper solution so I didn't settle with that.
BACKGROUND
I'm tasked with maintaining an old project that has gone through different versions of spring and only updated for separate modules, so things needed refactoring, to say the least. I had initially gotten the duplicate bean issue and tinkering with things changed the issue back and forth between OP's issue and the duplicate bean issue even though there was only one bean; navigating to the duplicate beans always went to the same class.
THE ISSUE
The issue was present on a @Repository class that was @Autowired in a @Service class which was also had the @ComponentScan annotation. I noticed that I also had a spring application-config.xml that was doing a context:component-scan on the base package, which I believe was the original approach in older versions of Spring. I was in the process of making a new branch by taking parts of an old branch and a newer branch in a support project that was used in different projects that were developed over several years and that is why there was such a mix-and-match of methodologies.
SIMPLE SOLUTION
Since the more modern approach of using @ComponentScan was already implemented I just removed the application-config.xml and the issue was solved.
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eg1:
director：Settings - Editor - Inspections - Spring - Spring Core - Code - Autowiring for Bean Class
operate:checkout 勾去掉
eg2:
1.impl class add @service
like this:
@Service
public class CityServiceImpl implements CityService{
@Autowired
private CityDao cityDao;
like this
2.dao file class add @Repository
@Repository
public interface CityDao {
I have the same issue.
And I think the proper way to fix it is to tell Intellij to find the correct Spring Context, rather than "suppress warning".
In short, File -> ProjectStructure(⌘;) -> Modules -> (select the module) -> Spring -> (click '+' to add context) -> OK
Add the context file:
done!
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For those who are using IDEA, you can simply remove those warnings that you know.
In mac, move your curse to the red wave line, press option+enter(alt+enter with Windows), you will see suggestions:
Try them, and you will see auto-added SuppressWarnings
Remember, option+enter always give nice solutions.
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Got the same error here!
It seems the Intellij cannot verify if the class implementation is a @Service or @Component.
Solved it by just changing from Error to Warning(Pressing Alt + Enter).
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Mine is for not adding @Repository on my CrudRepository interface, the tutorial I was watching didn't add it on STS and it didn't complain.
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Put this two annotations on top of your unit test class:
@SpringBootTest
@ExtendWith(SpringExtension.class)
class VerificationServiceTest {
@Autowired
private VerificationService service;
@Test
void matchUserBiometric() {
service. // some method / property
}
}
this error appear because there is no instance of your service class on the spring container, so basically when you try to run the test a null point is going to appear, you need to initialize the spring and then an instance of your class will be available.
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a little late but i hope it helps to someone else.
Make sure to put the @Service on the implementation class for the service
@Service
public class ServiceNameImpl implements ServiceName {
@Override
public void method(ObjectType paramName) {
//CODE
}
}
That's how i fixed the error.
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Make sure that your IntelliJ Idea (IDE) is aware of all the necessary spring configurations that your module is being inspected against.
You can check this under
File > Project Structure > Modules > [your project name in the right panel] > Spring
Sometimes, we need to explicitly tell the IDE that the spring configuration is coming from a dependency (a jar present in your project classpath)
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Solved the issue by going to File >> Project Structure >> Facets and then adding all the configuration files to Spring Facet. After that it started detecting files in which the beans reside and was able to sort the issue. IntelliJ giving this check is quite valuable and IMHO shouldn't be disabled.
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I got the same problem. Mine was because the bean containing the autowired reference was not a Spring component (it was an EJB), but got a SpringBeanAutowiringInterceptor Interceptor allowing the use of autowiring. I think Intellij don't take this possibility in its Autowiring inspection.
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I had the same problem with IntelliJ IDEA 13.1.4 I solved it by removing the Spring facet (File->Project Structure) and leaving it to just show "Detection".
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It seems like the visibility problem - the parent controller doesn't see the Component you are trying to wire.
Try to add
@ComponentScan("path to respective Component")
to the parent controller.
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If you know that the bean exists and its just a problem of the inspections, then just add the following before the variable declaration:
@SuppressWarnings("SpringJavaAutowiringInspection")
@Inject MyClass myVariable;
Sometimes IntelliJ cannot resolve if a bean has been declared, for example when the bean is included conditionally and the condition resolution happens dynamically at runtime. In such a case it seems the static code analyzer of IntelliJ cannot detect the bean.
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I realize I'm late to this, but I was facing the same issue today in my service class. I just realized that I was not using the annotation @Service at the top of my class, hence it was throwing this error.
Please make sure you have specified the correct annotations for your classes in Spring boot
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I had similar problem. I solved it by unchecking "Process explicitly annotated beans" option (see screenshot below). This option is enabled by default on linux. Now @Service and @Configurations annotations are visible. screenshot
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I've solved this problem this way. In IntelliJ all of your packages should be in a sub package which is the sub package of main/java. For example I've put all of my packages under src/main/java/com.misisol.watchStore/ and spring could find my beans then after.
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Suppressing the warning smells may not work as the warning can indicate that the instance was not injected, i.e. it's null.
If you are using Spring Boot:
I had the same problem. I solved it by adding the Spring facet (File->Project Structure) for each relevant module, and then add the configuration files. For some projects (spring mvc), the config files where detected automatically. However, for a jar project, I had to add the configuration files manually.