声明：教程是网上找的，代码是自己敲的
项目目录大致如下：
1. 首先创建Maven工程，在pom.xml中加入项目所需依赖：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion> <groupId>com.fitsoft</groupId>
<artifactId>shopmgr</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging> <!-- 配置的全局的属性 -->
<properties>
<junit.version>4.11</junit.version>
<jsp.api.version>8.5.5</jsp.api.version>
<jstl.version>1.2</jstl.version>
<spring.version>4.1.6.RELEASE</spring.version>
<aspectjweaver.version>1.8.5</aspectjweaver.version>
<mybatis.version>3.2.8</mybatis.version>
<mybatis.spring.version>1.2.2</mybatis.spring.version>
<c3p0.version>0.9.5</c3p0.version>
<mysql.version>8.0.11</mysql.version>
<log4j.version>1.2.17</log4j.version>
<json.version>2.4</json.version>
</properties> <!-- 配置项目需要哪些jar包 -->
<dependencies>
<!-- junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<!-- 该jar包保留到测试 -->
<scope>test</scope>
</dependency>
<!-- jsp-api、servlet-api、el -->
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jsp-api</artifactId>
<version>${jsp.api.version}</version>
<!-- 该jar包最终由Web容器提供 -->
<scope>provided</scope>
</dependency>
<!-- jstl -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>
<!-- Spring4 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- aspectjweaver -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>${aspectjweaver.version}</version>
</dependency>
<!-- mybatis3 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<!-- c3p0 -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>${c3p0.version}</version>
</dependency>
<!-- mysql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!-- log4j -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<!-- json-lib -->
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>${json.version}</version>
<!-- 指定jar包jdk版本的依赖 -->
<classifier>jdk15</classifier>
</dependency>
</dependencies>
</project>
2. 由于项目使用c3p0连接池，因此需要在resource目录下配置c3p0.properties，主要配置数据库驱动、地址、用户名、密码等属性。文件内容如下：
#连接数据库的地址
#配置数据库的驱动
c3p0.driverClass=com.mysql.cj.jdbc.Driver
c3p0.jdbcUrl=jdbc:mysql://localhost:3306/imoocdb?&characterEncoding=utf8&useSSL=false&serverTimezone=GMT&rewriteBatchedStatements=true&allowPublicKeyRetrieval=true
c3p0.user=root
c3p0.password=
#c3p0.maxPoolSize=20
#c3p0.minPoolSize=2
#c3p0.initialPoolSize=2
#c3p0.maxIdleTime=60
3. 项目启动首先要进入web.xml文件，因此Spring的监听器就放在这里配置
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0"> <!-- 配置Spring的核心监听器 -->
<!-- 提取Spring的配置文件 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:/spring/application*.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener></web-app>
4. 监听器用来加载application.xml的配置文件，注释太详细，不多说：
<?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:p="http://www.springframework.org/schema/p"
xmlns:c="http://www.springframework.org/schema/c"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
"> <!-- 配置一个扫描器 -->
<context:component-scan base-package="com.fitsoft.shop"/> <!-- 配置数据源的配置 C3P0作为数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"/> <!-- 配置连接工厂sqlSessionFactory
Spring + Mybatis
-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean" p:dataSource-ref="dataSource">
<!-- 扫描类型，为类型配置别名，默认配置的别名就是类名
以后映射文件中无需写类型的全限名
-->
<property name="typeAliasesPackage" value="com.fitsoft.shop.bean"/>
</bean> <!-- 配置扫描数据访问层接口的路径，为数据访问层接口做实现类对象 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" p:sqlSessionFactoryBeanName="sqlSessionFactory">
<!-- 配置数据访问接口：采用包扫描的方式到基础包下扫描所有的类，作为MyBatis2的数据访问接口，
并创建这些类的代理对象，创建出来后会把这些代理对象交给Spring容器管理，bean的id名默认为接口的类名前面首字母小写
多个包之间用;分隔 -->
<property name="basePackage" value="com.fitsoft.shop.repository"/>
</bean> <!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager" p:dataSource-ref="dataSource"/> <!-- 申明式事务，使用事务注解的方式去控制业务层的事务 开启annotation注解事务 -->
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>
