在第一次測試程式碼的spring.xml檔案

  <!--4.連線資料庫-->
    <bean id="db" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/chaoshi"></property>
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="user" value="root"></property>
        <property name="password" value="123456"></property>
    </bean>
   <bean id="fac" class="org.mybatis.spring.SqlSessionFactoryBean">
       <property name="dataSource" ref="db"></property>
       <property name="mapperLocations" value="classpath:/mapper/*.xml"></property>
   </bean>
   <bean id="temp" class="org.mybatis.spring.SqlSessionTemplate">
        <!--構造方法引數沒有,index=0-->
         <constructor-arg index="0" ref="fac"></constructor-arg>
   </bean>

 

改為

<!--連線資料庫-->
    <context:property-placeholder location="classpath:db.properties"></context:property-placeholder>
    <bean id="db" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/mydbb"></property>
        <property name="user" value="root"></property>
        <property name="password" value="123456"></property>
    </bean>

    <bean id="fac" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="db"></property>
        <property name="mapperLocations" value="classpath:/mapper/*.xml"></property>
        <property name="configLocation" value="classpath:mybatis.xml"></property>

    </bean>

	<!--註釋掉之前的程式碼-->
   <!-- <bean id="temp" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg index="0" ref="fac"></constructor-arg>
    </bean>-->

    <!--省略dao實現類-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.ly.dao"></property>
        <property name="sqlSessionFactory" ref="fac"></property>

    </bean>