Spring-mybatis connection fails with UnsatisfiedDependencyException - spring

Question

I am relatively new to Spring, and am having problem with establishing spring-mybatis setup environment. Here is my code. The exception I am getting is
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'loginController for com.infosender.service.UserServiceImpl.
I don't get this issue. Because the UserServiceImpl object is autowired in LoginController and UserServiceImpl class is autowired to UserDaoMapper interface, there should be a bean named UserServiceImpl. Why could be the reason for the bean not found?
package com.infosender.controller;
import java.sql.SQLException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.infosender.user.User;
import com.infosender.user.UserDao;
import com.infosender.user.UserDaoMapper;
import com.infosender.service.UserService;
import com.infosender.service.UserServiceImpl;;
#Controller
public class LoginController {
//UserService userService = UserService.getInstance();
#Autowired
UserServiceImpl userServiceImpl;
#RequestMapping(value="/login", method=RequestMethod.POST)
public String handleRequestInternal(
#ModelAttribute("username") String user_id,
#ModelAttribute("password") String user_pw
) {
User user = null;
try {
user = userServiceImpl.getUserByIdAndPw(user_id, user_pw);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(user == null) {
return "login_fail";
}
return "main_menu";
}
}
And here is UserService and UserServiceImpl
package com.infosender.service;
import java.sql.SQLException;
import javax.inject.Inject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.infosender.user.User;
import com.infosender.user.UserDao;
public interface UserService {
public User getUserByIdAndPw(String user_id, String user_pw)throws SQLException;
}
package com.infosender.service;
import java.sql.SQLException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import com.infosender.user.User;
import com.infosender.user.UserDao;
import com.infosender.user.UserDaoMapper;
#Service
public class UserServiceImpl implements UserService {
#Autowired
private UserDaoMapper userDaoMapper;
public User getUserByIdAndPw(String user_id, String user_pw)throws SQLException {
return userDaoMapper.getUserByIdAndPw(user_id, user_pw);
}
}
Here I have UserDao and UserDaoMapper
package com.infosender.user;
import java.sql.SQLException;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Repository;
#Repository
public class UserDao implements UserDaoMapper{
#Autowired
private SqlSessionTemplate sqlSession;
public void setSqlSessionTemplate(SqlSessionTemplate sqlSession) {
this.sqlSession = sqlSession;
}
public User getUserByIdAndPw(String user_id, String user_password) {
UserDaoMapper mapper = sqlSession.getMapper(UserDaoMapper.class);
return mapper.getUserByIdAndPw(user_id, user_password);
//return sqlSession.selectOne("com.infosender.user.UserDaoMapper.getUserByIdAndPw");
}
}
package com.infosender.user;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Repository;
public interface UserDaoMapper {
public User getUserByIdAndPw(#Param("user_id")String user_id,#Param("user_password")String user_password);
}
And the below is root-context.xml configuration.
<?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://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.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-3.2.xsd">
<context:annotation-config/>
<!-- org.apache.commons.dbcp.BasicDataSource -->
<!-- Root Context: defines shared resources visible to all other web components -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://127.0.0.1:3306/InfoSender"></property>
<property name="username" value="root"></property>
<property name="password" value="root"></property>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="configLocation" value="classpath:/WEB_INF/spring/mybatis/mybatis-config.xml"></property>
<property name="mapperLocations" value="classpath:*/mappers/*mapper.xml"></property>
</bean>
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory"></constructor-arg>
</bean>
<!-- <bean id="userDaoMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="mapperInterface" value="com.infosender.user.UserDaoMapper"></property>
<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
</bean>
-->
<context:component-scan base-package="com.infosender.*" />
</beans>
Here is the entire error log
ERROR: org.springframework.web.servlet.DispatcherServlet - Context initialization failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'loginController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.infosender.service.UserService' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {#org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1378)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:575)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:846)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:863)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:696)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:662)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:710)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:587)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:526)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:169)
at javax.servlet.GenericServlet.init(GenericServlet.java:158)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1238)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1151)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1038)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5027)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5337)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1407)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1397)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.infosender.service.UserService' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {#org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1646)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1205)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1166)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593)
... 31 more

Answer 1

To anybody who might view this page.
The problem was in fact in my web.xml file. There I declared two xml files with contextConfigLocation tag: root-context.xml and mybatis-config.xml.
What I did was that I wrote them 'separately', so that (I presume) the latter has somehow overwritten the former one, not creating the sqlSession beans as it ought to.
There were some mistakes in the code as the comments have suggested. But this was the main reason for not created beans.