c3p0数据源的引入

applicationContext.xml

<?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:aop="http://www.springframework.org/schema/aop"
       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-4.3.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">

    <!--1 引入属性文件，在配置中占位使用 -->
    <context:property-placeholder location="db.properties" />

    <!--2 配置C3P0数据源 -->
    <bean id="datasource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
        <!--驱动类名 -->
        <property name="driverClass" value="${jdbc.driver}" />
        <!-- url -->
        <property name="jdbcUrl" value="${jdbc.url}" />
        <!-- 用户名 -->
        <property name="user" value="${jdbc.uid}" />
        <!-- 密码 -->
        <property name="password" value="${jdbc.password}" />
        <!-- 当连接池中的连接耗尽的时候c3p0一次同时获取的连接数  -->
        <property name="acquireIncrement" value="5"></property>
        <!-- 初始连接池大小 -->
        <property name="initialPoolSize" value="10"></property>
        <!-- 连接池中连接最小个数 -->
        <property name="minPoolSize" value="5"></property>
        <!-- 连接池中连接最大个数 -->
        <property name="maxPoolSize" value="20"></property>
    </bean>

    <!--3 会话工厂bean sqlSessionFactoryBean -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 数据源 -->
        <property name="dataSource" ref="datasource"></property>
        <!-- 别名 -->
        <property name="typeAliasesPackage" value="com.zhangguo.bookstore.entities"></property>
        <!-- sql映射文件路径 -->
        <property name="mapperLocations" value="classpath*:BookMapper.xml"></property>
    </bean>

    <!--4 自动扫描对象关系映射 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--指定会话工厂，如果当前上下文中只定义了一个则该属性可省去 -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
        <!-- 指定要自动扫描接口的基础包，实现接口 -->
        <property name="basePackage" value="com.zhangguo.bookstore.mapper"></property>
    </bean>

    <!--5 声明式事务管理 -->
    <!--定义事物管理器，由spring管理事务 -->


    <!-- 配置spring的PlatformTransactionManager，名字为默认值 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="datasource" />
    </bean>


    <!--  开启注解的事务管理机制 ioc扫描整个包已经做到了-->

    <!-- 开启事务控制的注解支持 -->
    <tx:annotation-driven transaction-manager="transactionManager"/>


    <!--6 容器自动扫描IOC组件  -->
    <context:component-scan base-package="com.zhangguo"/>

    <!--7 aspectj支持自动代理实现AOP功能 -->
    <aop:aspectj-autoproxy proxy-target-class="true"></aop:aspectj-autoproxy>
        </beans>
   

db.properties

#mysql jdbc
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/book?useUnicode=true&characterEncoding=UTF-8
jdbc.uid=root
jdbc.password=root

book

<?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.zhangguo.bookstore.mapper.BookMapper">

    <resultMap type="com.zhangguo.bookstore.entities.Book" id="bookmap">
        <result property="id" column="id"></result>
        <result property="title" column="title"></result>
        <result property="price" column="price"></result>
        <result property="publishDate" column="publishDate"></result>

    </resultMap>

    <!--id应该是接口中的方法，结果类型如没有配置别名则应该使用全名称 -->
    <!--获得所有图书 -->
    <select id="getAllBooks" resultMap="bookmap">
        select id,title,price,publishDate from books
    </select>
    <!--获得图书对象通过编号 -->
    <select id="getBookById" resultType="com.zhangguo.bookstore.entities.Book">
        select id,title,price,publishDate from books where id=#{id}
    </select>
    <!-- 增加 -->
    <insert id="add">
        insert into books(title,price,publishDate)
        values(#{title},#{price},#{publishDate})
    </insert>
    <!-- 删除 -->
    <delete id="delete">
        delete from books where id=#{id}
    </delete>
    <!-- 更新 -->
    <update id="update">
        update books set title=#{title},price=#{price},publishDate=#{publishDate}
        where id=#{id}
    </update>
</mapper>

log4j

<?xml version="1.0" encoding="UTF-8"?>

<Configuration status="warn">
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="%m%n" />
        </Console>
    </Appenders>
    <Loggers>
        <Root level="INFO">
            <AppenderRef ref="Console" />
        </Root>
    </Loggers>
</Configuration>