Autowired - No qualifying bean of type found for dependency at least 1 bean

Question

Currently I m facing an issue in Autowire configuration between controller and the service layer   I m unable to trace my mistakes   Simple Log Info       SEVERE    Exception while loading the app     SEVERE    Undeployment failed for context  OTT     SEVERE    Exception while loading the app   java lang IllegalStateException  ContainerBase addChild  start  org apache catalina LifecycleException  org apache catalina LifecycleException  org springframework beans factory NoSuchBeanDefinitionException   No qualifying bean of type  com ott service EmployeeService  found for dependency  expected at least 1 bean which qualifies as autowire candidate for this dependency  Dependency annotations       Below I have also given the Controller and Service Layer code and also the dispatcher-servlet xml  Controller  package com ott controller   import com ott service EmployeeService  import org springframework beans factory annotation Autowired  import org springframework beans factory annotation Qualifier  import org springframework stereotype Controller  import org springframework web bind annotation RequestMapping                          author SPAR              Controller     public class AdminController            private EmployeeService employeeService            RequestMapping   employee           public String employee                this employeeService fetchAll                return  employee                       Autowired required   true           Qualifier value  employeeService           public void setEmployeeService EmployeeService empService                this employeeService   empService                     Service Interface  package com ott service   import com ott hibernate Employee  import java util List              author SPAR     public interface EmployeeService         List lt Employee gt  fetchAll          Service Interface Impl  package com ott service   import com ott dao EmployeeDAO  import com ott hibernate Employee  import java util List  import org springframework beans factory annotation Autowired  import org springframework beans factory annotation Qualifier  import org springframework stereotype Service  import org springframework transaction annotation Transactional              author SPAR      Service public class EmployeeServiceImpl implements EmployeeService       private EmployeeDAO employeeDAO        Override      Transactional readOnly   true      public List lt Employee gt  fetchAll              List lt Employee gt  employees   employeeDAO fetchAll            for  Employee employee   employees                 System out println  Name     employee getFirst Name         employee getLast Name                  System out println  Email Id     employee getEmail Id                        return employees              Autowired required   true       Qualifier value  employeeDAO       public void setEmployeeDAO EmployeeDAO empDAO            this employeeDAO   empDAO            Dispatcher-servlet xml    lt  xml version  1 0  encoding  UTF-8    gt       lt  -- was   lt  xml version  1 0  encoding  UTF-8   gt  -- gt       lt beans xmlns  http   www springframework org schema beans             xmlns xsi  http   www w3 org 2001 XMLSchema-instance             xmlns p  http   www springframework org schema p             xmlns aop  http   www springframework org schema aop             xmlns tx  http   www springframework org schema tx             xmlns context  http   www springframework org schema context             xmlns mvc  http   www springframework org schema mvc                    xsi schemaLocation  http   www springframework org schema beans http   www springframework org schema beans spring-beans-4 0 xsd            http   www springframework org schema aop http   www springframework org schema aop spring-aop-4 0 xsd            http   www springframework org schema tx http   www springframework org schema tx spring-tx-4 0 xsd            http   www springframework org schema context http   www springframework org schema context spring-context-4 0 xsd            http   www springframework org schema mvc http   www springframework org schema mvc spring-mvc-4 0 xsd  gt            lt context component-scan base-package  com ott controller   gt           lt context component-scan base-package  com ott hibernate   gt           lt context component-scan base-package  com ott service   gt           lt context component-scan base-package  com ott dao   gt            lt bean class  org springframework web servlet mvc method annotation RequestMappingHandlerMapping   gt           lt bean class  org springframework web servlet mvc method annotation RequestMappingHandlerAdapter   gt            lt mvc resources mapping   resources     location   resources     gt             lt bean id  tilesConfigurer  class  org springframework web servlet view tiles3 TilesConfigurer  gt               lt property name  definitions  gt                   lt list gt                       lt value gt  WEB-INF tiles-def general-layout xml lt  value gt                   lt  list gt               lt  property gt           lt  bean gt            lt bean id  viewResolverTiles  class  org springframework web servlet view UrlBasedViewResolver  gt               lt property name  viewClass  value  org springframework web servlet view tiles3 TilesView   gt           lt  bean gt             lt mvc annotation-driven   gt            lt bean           class  org springframework web servlet view InternalResourceViewResolver  gt             lt property name  prefix  gt               lt value gt  WEB-INF pages  lt  value gt             lt  property gt             lt property name  suffix  gt               lt value gt  jsp lt  value gt             lt  property gt           lt  bean gt       lt  beans gt

User · Accepted Answer

You don t have to necessarily provide name and Qualifier  If you set a name  that s the name with which the bean is registered in the context  If you don t provide a name for your service it will be registered as uncapitalized non-qualified class name based on BeanNameGenerator  So in your case the Implementation will be registered as employeeServiceImpl  So if you try to autowire with that name  it should resolve directly   private EmployeeService employeeServiceImpl    RequestMapping   employee   public String employee         this employeeService fetchAll        return  employee       Autowired required   true  public void setEmployeeService EmployeeService employeeServiceImpl        this employeeServiceImpl   employeeServiceImpl       Qualifier is used in case if there are more than one bean exists of same type and you want to autowire different implementation beans for various purposes

User · Answer

Guys I found the issue   I just tried by adding the qualifier name in employee service finally it solved my issue    Service  employeeService    public class EmployeeServiceImpl implements EmployeeService

User · Answer

Service  It tells  that particular class is a Service to the client  Service class contains mainly business Logic  If you have more Service classes in a package than provide  Qualifier otherwise it should not require  Qualifier   Case 1      Service  employeeService   public class EmployeeServiceImpl implements EmployeeService      Case2    Service public class EmployeeServiceImpl implements EmployeeService      both cases are working

User · Answer

Just add below annotation with qualifier name of service in service Implementation class    Service  employeeService    Transactional public class EmployeeServiceImpl implements EmployeeService

User · Answer

I believe for  Service you have to add qualifier name like below     Service  employeeService   should solve your issue  or after  Service you should add  Qualifier annontion like below     Service  Qualifier  employeeService

User · Answer

In your controller class  just add  ComponentScan  package   annotation  In my case the package name is com shoppingcart So i wrote the code as  ComponentScan  com shoppingcart   and it worked for me

User · Answer

If you only have one bean of type EmployeeService  and the interface EmployeeService does not have other implementations  you can simply put   Service  before the EmployeeServiceImpl and   Autowire  before the setter method  Otherwise  you should name the special bean like  Service  myspecial   and put   autowire  Qualifier  myspecial   before the setter method

User · Answer

Missing the  implements  keyword in the impl classes might also be the issue

User · Answer

You forgot  Service annotation in your service class

[spring] @Autowired - No qualifying bean of type found for dependency at least 1 bean

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