<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsdhttp://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd"><!-- 加载配置文件 --><context:property-placeholder location="classpath:db.properties"/><!-- dbcp 连接池 --><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><!-- mybatis的工厂其中要注入 1连接池（dataSource） 2.--><bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource"></property><property name="configLocation" value="classpath:SqlMapConfig.xml"></property></bean><!-- userdao 原始开发--><bean id="userDao" class="com.itheima.dao.UserDaoImpl"><property name="sqlSessionFactory" ref="sqlSessionFactoryBean"></property></bean><!-- mapper接口动态代理 --><!-- <bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean"><property name="sqlSessionFactory" ref="sqlSessionFactoryBean"></property>指定MapperFactoryBean要实现的接口<property name="mapperInterface" value="com.itheima.mapper.UserMapper"></property></bean> --><!-- mapper接口动态代理  增强版:扫描--><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><!-- 基本包   自动实现该包（com.itheima.mapper）下的所有接口--><property name="basePackage" value="com.itheima.mapper"></property></bean>
</beans>

<?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><!-- 设置别名 --><typeAliases><!-- 2. 指定扫描包，会把包内所有的类都设置别名，别名的名称就是类名，大小写不敏感 --><package name="com.itheima.domain" /></typeAliases><mappers><package name="com.itheima.mapper"/></mappers>
</configuration>

<?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.itheima.mapper.UserMapper"><!-- 根据用户id查询 --><select id="queryUserById" parameterType="int" resultType="user">select * from user where id = #{id}</select></mapper>