mybatis 学习三 关键文件解析

1:  mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
  PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <!-- 全局别名设置，在映射文件中只需写别名，而不必写出整个类路径  -->
    <typeAliases>
         <typeAlias type="com.deppon.test04.entity.StudentEntity" alias="StudentEntity"/>
    </typeAliases>
    <mappers>
        <mapper resource="StudentMapper.xml" />    <!--  可以定义多个mapper>
    </mappers>
</configuration>  

2: StudentMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.deppon.test04.dao.StudentMapper">
    <resultMap type="StudentEntity" id="studentResultMap">
        <id property="studentID" column="STUDENT_ID"/>
        <result property="studentName" column="STUDENT_NAME"/>
        <result property="studentSex" column="STUDENT_SEX"/>
        <result property="studentBirthday" column="STUDENT_BIRTHDAY"/>
    </resultMap>
    <!-- 查询学生，根据id -->
    <select id="getStudent" parameterType="String" resultType="com.deppon.test04.entity.StudentEntity" resultMap="studentResultMap">
        <![CDATA[
            SELECT * from STUDENT_TBL ST
                WHERE ST.STUDENT_ID = #{studentID}
        ]]>
    </select>
    <!-- 查询学生列表 -->
    <select id="getStudentAll"  resultType="com.deppon.test04.entity.StudentEntity" resultMap="studentResultMap">
        <![CDATA[
            SELECT * from STUDENT_TBL
        ]]>
    </select>
</mapper>  

3:  mysql.properties

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/student_manager?user=root&password=root&useUnicode=true&characterEncoding=UTF-8

4: dispatcherServlet

 <mvc:annotation-driven />
    <context:component-scan base-package="liming.maven.example" />
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/" />
        <property name="suffix" value=".jsp" />
    </bean>
    <!-- 导入属性配置文件 -->
    <context:property-placeholder location="classpath:mysql.properties" />
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
            <property name="driverClassName" value="${jdbc.driverClassName}" />
            <property name="url" value="${jdbc.url}" />
    </bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource" />
</bean>  

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="configLocation" value="classpath:mybatis-config.xml" />
    <property name="dataSource" ref="dataSource" />
</bean>
<bean id="studentMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
    <property name="mapperInterface" value="com.deppon.test04.dao.StudentMapper" />
    <property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>