How to catch Spring bean creation error - Injection of autowired dependency? - spring

Question

AdminService.java
package service;
import java.util.HashMap;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import dao.IAdminDAO;
import dao.IMemberDAO;
public interface AdminService
{
public HashMap<String, Object> adminLogin(String id,String pw);
}
AdminServiceImple.java
package service;
import java.util.HashMap;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import dao.IAdminDAO;
#Service
public class AdminServiceImple implements AdminService
{
#Autowired
private IAdminDAO adminDao;
#Override
public HashMap<String, Object> adminLogin(String id, String pw)
{
HashMap<String, Object> adminResult = adminDao.selectOne(id);
if(adminResult != null)
{
String opwd = (String) adminResult.get("pw");
if(opwd.equals(pw))
{
if(adminResult.get("authority").equals(true))
{
return adminResult;
}
else
{
return null;
}
}
else
{
return null;
}
}
else
{
return null;
}
}
}
AdminController.java
package controller;
import java.io.IOException;
import java.util.HashMap;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
import service.AdminService;
import service.AdminServiceImple;
import service.MemberService;
#Controller
public class AdminController
{
#Autowired
public AdminServiceImple adminService;
// 관리자 로그인 폼 페이지
#RequestMapping("admin.do")
public String adminLoginPage()
{
return "adminLoginPage";
}
// 관리자 로그인했을 시 요청
#RequestMapping("adminLoginOK.do")
#ResponseBody
public String adminMainPage(#RequestParam(required=false) String id, #RequestParam(required=false)String pw,HttpSession session,HttpServletRequest req,HttpServletResponse resp)
{
HashMap<String, Object> adminLoginIdentify = adminService.adminLogin(id, pw);
if(adminLoginIdentify != null)
{
return "1";
}
else
{
return "0";
}
}
#RequestMapping("adminPage.do")
public String adminPage(HttpSession session,HttpServletRequest resquest,HttpServletResponse response) throws IOException
{
return "adminMainPage";
}
}
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.3.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd">
<context:component-scan base-package="dao, service" />
<bean class="org.springframework.jdbc.datasource.DriverManagerDataSource" id="dataSource">
<property value="com.mysql.jdbc.Driver" name="driverClassName"></property>
<property value="jdbc:mysql://localhost/rachelvf" name="url"></property>
<property value="root" name="username"/>
<property value="mysql" name="password"/>
</bean>
<bean class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="mapperLocations" value="classpath:dao/mapper/*.xml"></property>
<property name="typeAliasesPackage" value="model"></property>
<property name="dataSource" ref="dataSource"></property>
</bean>
<bean class="org.mybatis.spring.mapper.MapperFactoryBean" id="memberDao">
<property name="mapperInterface" value="dao.IMemberDAO"></property>
<property name="sqlSessionFactory" ref="SqlSessionFactory"></property>
</bean>
<bean class="org.mybatis.spring.mapper.MapperFactoryBean" id="adminDao">
<property name="mapperInterface" value="dao.IAdminDAO"></property>
<property name="sqlSessionFactory" ref="SqlSessionFactory"></property>
</bean>
</beans>
that is error code.
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'adminServiceImple': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private dao.IAdminDAO service.AdminServiceImple.adminDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [dao.IAdminDAO] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {#org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1210)
I thought about the cause of the error, but I think it is because I did not insert the service annotation.
However, there is no typos in any way, and everything is written correctly and errors occur. Is there something I don't know?
Can you tell me what caused this error?
And what about the solution?

Answer 1

make sure that AdminDao bean is creating and injecting correctly into
AdminServiceImple
use this tag in your spring-cfg.xml file
<context:component-scan base-package="dao" />
and also scan the controller class using --
<context:component-scan base-package="controller" />
you have to give information of class which are going to use annotation to IOC container to create bean...

Answer 2

A mapper is registered to Spring by including a MapperFactoryBean in your XML config file like follows:
<bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="mapperInterface" value="org.mybatis.spring.sample.mapper.UserMapper" />
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>

Answer 3

try this to scan your Service Package and Dao Package.
<context:component-scan base-package="dao, service" />
above code will scan the dao and service package respectively.