02.SSM框架整合-Spring整合Mybatis

创建数据库连接资源db.properties

创建db.properties文件,里面存放连接mysql数据库的资源,然后将文件放入resources目录下

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///ssm?characterEncoding=utf8&allowMultiQueries=true
jdbc.username=root
jdbc.password=123456

SqlMapConfig.xml

SqlMapConfig.xml是Mybatis的核心配置文件,配置如下

<?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>
	<!-- 全局配置参数 -->
	<settings>
		<!-- 开启延迟加载 -->
		<setting name="lazyLoadingEnabled" value="true" />
		<setting name="aggressiveLazyLoading" value="false" />
		<!-- 开启二级缓存 -->
		<setting name="cacheEnabled" value="true" />
	</settings>
	
</configuration>

Mybatis的数据源,类型别名,mapper映射器,都交给Spring去配置

spring整合Mybatis

创建applicationContext.xml文件作为Spring的核心配置文件放入resources目录下。
applicationContext.xml配置如下:

<?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"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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-3.0.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">

    <context:component-scan base-package="com.lg">
        <!-- 不扫描controller注解,让springmvc去扫描-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!-- 加载数据库的属性文件 -->
    <context:property-placeholder location="classpath:db.properties" />

    <!-- 配置c3p0数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

    <!-- 注册session工厂  使用spring与mybatis的整合包 -->
    <bean id="factory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="typeAliasesPackage" value="com.lg.pojo"></property>
        <property name="configLocation" value="classpath:SqlMapConfig.xml"/>
    </bean>

    <!-- 批量扫描mapper包，创建代理对象 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.lg.mapper"/>
        <property name="sqlSessionFactoryBeanName" value="factory"/>
    </bean>

    <!-- 注册事务管理器 -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!-- 开启注解扫描 -->
    <tx:annotation-driven transaction-manager="txManager"/>

</beans>