UnsatisfiedDependencyException Error creating bean with name

Question

For several days I m trying to create Spring CRUD application  I m confused  I can t solve this errors      org springframework beans factory UnsatisfiedDependencyException  Error creating bean with name  clientController   Unsatisfied dependency expressed through method  setClientService  parameter 0  nested exception is org springframework beans factory UnsatisfiedDependencyException  Error creating bean with name  clientService   Unsatisfied dependency expressed through field  clientRepository   nested exception is org springframework beans factory NoSuchBeanDefinitionException  No qualifying bean of type  com kopylov repository ClientRepository  available  expected at least 1 bean which qualifies as autowire candidate  Dependency annotations    org springframework beans factory annotation Autowired required true     and this     org springframework beans factory UnsatisfiedDependencyException  Error creating bean with name  clientService   Unsatisfied dependency expressed through field  clientRepository   nested exception is org springframework beans factory NoSuchBeanDefinitionException  No qualifying bean of type  com kopylov repository ClientRepository  available  expected at least 1 bean which qualifies as autowire candidate  Dependency annotations    org springframework beans factory annotation Autowired required true     ClientController   Controller public class ClientController   private ClientService clientService    Autowired  Qualifier  clientService   public void setClientService ClientService clientService       this clientService clientService     RequestMapping value    registration add   method   RequestMethod POST  public String addUser  ModelAttribute Client client       this clientService addClient client   return  home         ClientServiceImpl   Service  clientService   public class ClientServiceImpl implements ClientService   private ClientRepository clientRepository    Autowired  Qualifier  clientRepository   public void setClientRepository ClientRepository clientRepository       this clientRepository clientRepository        Transactional public void addClient Client client       clientRepository saveAndFlush client         ClientRepository  public interface ClientRepository extends JpaRepository lt Client  Integer gt         I looked through a lot of similar questions  but no one answer to them can t help me

User · Answer

If you describe a field as criteria in method definition ("findBy"), You must pass that parameter to the method, otherwise you will get "Unsatisfied dependency expressed through method parameter" exception.

public interface ClientRepository extends JpaRepository<Client, Integer> {
       Client findByClientId();                ////WRONG !!!!
       Client findByClientId(int clientId);    /// CORRECT 
}

*I assume that your Client entity has clientId attribute.

User · Answer

The ClientRepository should be annotated with  Repository tag   With your current configuration Spring will not scan the class and have knowledge about it  At the moment of booting and wiring will not find the ClientRepository class    EDIT If adding the  Repository tag doesn t help  then I think that the problem might be now with the ClientService and ClientServiceImpl   Try to annotate the ClientService  interface  with  Service  As you should only have a single implementation for your service  you don t need to specify a name with the optional parameter  Service  clientService    Spring will autogenerate it based on the interface  name   Also  as Bruno mentioned  the  Qualifier is not needed in the ClientController as you only have a single implementation for the service    ClientService java   Service public interface ClientService        void addClient Client client       ClientServiceImpl java  option 1    Service public class ClientServiceImpl implements ClientService       private ClientRepository clientRepository        Autowired     public void setClientRepository ClientRepository clientRepository           this clientRepository clientRepository              Transactional     public void addClient Client client           clientRepository saveAndFlush client             ClientServiceImpl java  option 2 preferred    Service public class ClientServiceImpl implements ClientService        Autowired     private ClientRepository clientRepository        Transactional     public void addClient Client client           clientRepository saveAndFlush client             ClientController java   Controller public class ClientController       private ClientService clientService        Autowired        Qualifier  clientService       public void setClientService ClientService clientService           this clientService clientService              RequestMapping value    registration   method   RequestMethod GET      public String reg Model model           model addAttribute  client   new Client             return  registration               RequestMapping value    registration add   method   RequestMethod POST      public String addUser  ModelAttribute Client client           this clientService addClient client       return  home

User · Answer

Add  Component annotation just above the component definition

User · Answer

Considering that your package scanning is correctly set either through XML configuration or annotation based configuration   You will need a  Repository on your ClientRepository implementation as well to allow Spring to use it in an  Autowired  Since it s not here we can only suppose that s what s missing   As a side note  it would be cleaner to put your  Autowired  Qualifier directly on your member if the setter method is only used for the  Autowired    Autowired  Qualifier  clientRepository   private ClientRepository clientRepository    Lastly  you don t need the  Qualifier is there is only one class implementing the bean definition so unless you have several implementation of ClientService and ClientRepository you can remove the  Qualifier

User · Answer

I know it seems too late  but it may help others in future   I face the same error and the problem was that spring boot did not read my services package so add    ComponentScan basePackages     com example demo Services     you have to specify your own path to the services package  and in the class  demoApplication  class that have main function  and for service interface must be annotated   Service and the class that implement the service interface must be annotated with  Component  then autowired the service interface

User · Answer

Check out the table structure of Client table  if there is a mismatch between table structure in db and the entity  you would get this error    I had this error which was coming due to datatype mismatch of primary key between db table and the entity

User · Answer

I had the exactly same issue  with a very very long stack trace  At the end of the trace I saw this      InvalidQueryException  Keyspace  mykeyspace  does not exist   I created the keyspace in cassandra  and solved the problem   CREATE KEYSPACE mykeyspace   WITH REPLICATION          class     SimpleStrategy        replication factor    1

User · Answer

There is another instance still same error will shown after you doing everything above mentioned  When you change your codes accordingly mentioned solutions make sure to keep originals  So you can easily go back  So go and again check dispatcher-servelet configuration file s base package location  Is it scanning all relevant packages when you running application    lt context component-scan base-package  your pakage path here   gt

User · Answer

Add  Repository annotation to the Spring Data JPA repo

User · Answer

This error can occur if there are syntax errors with Derived Query Methods  For example  if there are some mismatches with entity class fields and the Derived methods  names

User · Answer

I was facing the same issue  and it was  as i missed marking my DAO class with Entity annotations  I tried below and error got resolved         enter code here      Entity  lt -- was missing earlier     public class Topic            Id           String id          String name          String desc

User · Answer

That was the version incompatibility where their was the inclusion of lettuce  When i excluded   it worked for me    lt  --Spring-Boot 2 0 0 -- gt       lt dependency gt                   lt groupId gt org springframework boot lt  groupId gt                   lt artifactId gt spring-boot-starter-data-redis lt  artifactId gt                   lt exclusions gt                       lt exclusion gt                           lt groupId gt io lettuce lt  groupId gt                           lt artifactId gt lettuce-core lt  artifactId gt                       lt  exclusion gt                   lt  exclusions gt                   lt  dependency gt               lt dependency gt                   lt groupId gt redis clients lt  groupId gt                   lt artifactId gt jedis lt  artifactId gt               lt  dependency gt

User · Answer

If you are using Spring Boot  your main app should be like this  just to make and understand things in simple way   -   package aaa bbb ccc   SpringBootApplication  ComponentScan    aaa bbb ccc       public class Application           Make sure you have  Repository and  Service appropriately annotated   Make sure all your packages fall under - aaa bbb ccc    In most cases this setup resolves these kind of trivial issues  Here is a full blown example  Hope it helps

User · Answer

See if your      lt context component-scan base-package  quot your package  quot   gt  is missing in either config or context xml file

User · Answer

That might happen because the pojos you are using lack of the precise constructor the service needs  That is  try to generate  all the constructors for the pojo or objects  model object  that your serviceClient uses  so that the client can be instanced correctly  In your case regenerate the constructors  with arguments for your client object  taht is your model object

User · Answer

The application needs to be placed in the same directory as the scanned package

User · Answer

I just added the  Repository annotation to Repository interface and  EnableJpaRepositories   domain repositroy-package   to the main class  It worked just fine

User · Answer

Just add  Service annotation to top of the service class

User · Answer

According to documentation you should set XML configuration    lt jpa repositories base-package  com kopylov repository    gt

User · Answer

Try adding  EntityScan basePackages    insert package name here   on top of your main class

[java] UnsatisfiedDependencyException: Error creating bean with name

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