maven项目编写相应的配置文件——sqlMapConfig.xml、AccountMapper.xml、applicationContext.xml、spring-mvc.xml、web.xml

1. 配置sqlMapConfig核心配置文件和Mapper映射文件
   sqlMapConfig.xml：

• 配置数据库的环境
• 定义别名
• 加载映射文件

<?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">
<!--核心文件，主要配置mybatis的核心内容，配置数据库的环境和加载映射（映射文件中需要使用到的别名也在此定义）-->

<configuration>
    <!--加载jdbc.properties文件-->
    <properties resource="jdbc.properties"></properties>

    <!--自定义别名-->
    <typeAliases>
        <!--<typeAlias type="com.itheima.domain.User" alias="user"></typeAlias>-->
        <package name="com.itheima.domain"/>
    </typeAliases>

<!--配置数据源的环境-->
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
    </environments>

<!--加载映射文件-->
    <mappers>
        <!--<mapper resource="com.itheima.mapper/AccountMapper.xml"></mapper>-->
        <package name="com.itheima.mapper"/>
    </mappers>
</configuration>

AccountMapper.xml：
定义sql语句：参数和返回值的类型需要使用到核心配置文件中定义的别名

<?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">
<!--此映射文件主要配置sql语句-->

<mapper namespace="com.itheima.mapper.AccountMapper">


    <select id="findAll" resultType="account">
       select * from account
    </select>

    <select id="save" parameterType="account">
        insert into account values(${id},${name},${money})
    </select>
</mapper>

2. 配置spring和spring-mvc配置文件

• 在applicationContext.xml中配置spring的组件扫描，扫描service和mapper，controller在spring-mvc中进行扫描，因此排除掉

<?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"
       xsi:schemaLocation="
                    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.xsd
">

<!--组件扫描，扫描service和mapper-->
    <context:component-scan base-package="com.itheima">
        <!--排除controller，spring-mvc去扫描controller-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

</beans>

• 配置spring-mvc.xml
  扫描controller
  配置注解驱动
  配置视图解析器
  开放静态资源访问权限

<?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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
">

    <!--引入一下mvc的命名空间xmlns:mvc="http://www.springframework.org/schema/mvc"
            和http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd-->
    <!--组件扫描，扫描Controller-->
    <context:component-scan base-package="com.itheima.controller"/>
    <!--配置注解驱动-->
    <mvc:annotation-driven/>
    <!--配置视图解析器，确定一下前后缀-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <!--静态资源权限开放-->
    <mvc:default-servlet-handler/>

</beans>

3. 配置web.xml