スプリングmvc執行@Testエラー

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userDao' defined in class path resource [spring/bean.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.chen.ssm.dao.UserDao]: Specified class is an interface

......

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.chen.ssm.dao.UserDao]: Specified class is an interface

問題の説明:このオブジェクトを実装できません.
解決方法:1、問題の提示を確認します.主にCaused byに注意します.後の情報提示2、UserDaoはインターフェースです.UserDaoImplは実現類です.

public interface UserDao {

    //  id      
    public User findUserById(int id) throws Exception;
}

public class UserDaoImpl extends SqlSessionDaoSupport implements UserDao {

    public User findUserById(int id) throws Exception {
        //   SqlSessionDaoSupport，  this.getSqlSession()  sqlSession
        SqlSession sqlSession = this.getSqlSession();

        User user = sqlSession.selectOne("test.findUserById",id);

        return user;
    }

}

3、核心配置ファイルが二つの種類の接続をすることに注意する.

  
<beans xmlns="http://www.springframework.org/schema/beans"  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
    xmlns:aop="http://www.springframework.org/schema/aop"  
    xmlns:mvc="http://www.springframework.org/schema/mvc"  
    xmlns:context="http://www.springframework.org/schema/context"  
    xmlns:tx="http://www.springframework.org/schema/tx"  
    xsi:schemaLocation="http://www.springframework.org/schema/beans  
        http://www.springframework.org/schema/beans/spring-beans-4.2.xsd  
        http://www.springframework.org/schema/tx  
        http://www.springframework.org/schema/tx/spring-tx-4.2.xsd  
        http://www.springframework.org/schema/aop  
        http://www.springframework.org/schema/aop/spring-aop-4.2.xsd  
        http://www.springframework.org/schema/context  
        http://www.springframework.org/schema/context/spring-context-4.2.xsd  
        http://www.springframework.org/schema/mvc  
        http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd"> 

    
    <context:property-placeholder location="classpath:db.properties"/>

    
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">  
      <property name="driverClassName" value="${jdbc.driver}"/>  
      <property name="url" value="${jdbc.url}"/>  
      <property name="username" value="${jdbc.username}"/>  
      <property name="password" value="${jdbc.password}"/>
      <property name="maxActive" value="10"/>
      <property name="maxIdle" value="5"/>
    bean>

    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        
        <property name="configLocation" value="mybatis/SqlMapConfig.xml"/>

        
        <property name="dataSource" ref="dataSource"/>
    bean> 

         
    <bean id="userDao" class="com.chen.ssm.dao.UserDao">
        <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
    bean>     

beans>

以前のspring-hibernateコアプロファイルを設定した時、それらの間のパスを書き間違えたようです.最後に発見されました.

     
    <bean id="userDao" class="com.chen.ssm.dao.UserDao">
        <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
    bean>     

のクラスパスは確かに間違っています.実現類のパスを書くべきです.次のように修正します.

id="userDao" class="com.chen.ssm.dao.UserDaoImpl">
        <property name="sqlSessionFactory" ref="sqlSessionFactory"/>