概述：这些配置文件很烦，建议直接复制粘贴

springMVC.xml文件

<?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:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsd"><context:component-scan base-package="edu.gyc"/><mvc:annotation-driven/><!--解决静态资源js css访问的问题--><mvc:default-servlet-handler/><!-- 配置视图解析器 --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/><property name="prefix" value="/WEB-INF/jsp/"/><property name="suffix" value=".jsp"/>
</bean>
</beans>

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:context="http://www.springframework.org/schema/context"xmlns:tx="http://www.springframework.org/schema/tx"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop.xsd"><context:component-scan base-package="edu.gyc"></context:component-scan><!-- 读取java配置文件，替换占位符数据 --><context:property-placeholder location="classpath:jdbc.properties"/><!-- 配置数据源 --><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"init-method="init" destroy-method="close"><!-- 数据库基本信息配置 --><property name="url" value="${druid.url}" /><property name="username" value="${druid.username}" /><property name="password" value="${druid.password}" /><property name = "driverClassName" value = "com.mysql.cj.jdbc.Driver" /><!-- 初始化连接数量 --><property name="initialSize" value="${druid.initialSize}" /><!-- 最小空闲连接数 --><property name="minIdle" value="${druid.minIdle}" /><!-- 最大并发连接数 --><property name="maxActive" value="${druid.maxActive}" /><!-- 配置获取连接等待超时的时间 --><property name="maxWait" value="${druid.maxWait}" /></bean><!-- 配置SqlSessionFactory --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><!-- 注入dataSource --><property name="dataSource" ref="dataSource"/><property name="mapperLocations" value="classpath:mapper/*.xml"/></bean><!-- 配置Mapper代理对象方式一：MapperFactoryBean（了解） --><!-- 通过MapperFactoryBean生成的代理对象，一次只能针对一个接口进行生成 --><!--<bean id="accountMapper" class="org.mybatis.spring.mapper.MapperFactoryBean"><property name="sqlSessionFactory" ref="sqlSessionFactory"></property><property name="mapperInterface" value="top.alanshelby.mapper.AccountMapper"></property></bean>--><!-- 配置Mapper代理对象方式二：MapperScannerConfigurer --><!-- 批量代理对象的生成 --><!-- 注意事项：mapper接口类和mapper映射文件同包同名 --><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><!-- 指定需要生成代理的接口所在的包名 --><property name="basePackage" value="edu.gyc.dao"/><!-- 注意事项：千万不要配置SqlSessionFactory，要配置sqlSessionFactoryBeanName --><!-- <property name="sqlSessionFactory" ref="sqlSessionFactory"></property> --><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/></bean><!-- 配置平台事务管理器 --><bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource"></property></bean><!-- 事务通知 --><tx:advice id="txAdvice" transaction-manager="transactionManager"><tx:attributes><tx:method name="transfer*" propagation="REQUIRED" isolation="DEFAULT"/></tx:attributes></tx:advice><!-- 实现注解的声明式事务 --><tx:annotation-driven transaction-manager="transactionManager" mode="proxy"/>
</beans>

在这个文件中就已经配置了sqlSessionFactory、MapperScannerConfigurer 。

一个用来与数据库进行交互的，一个用来扫描包的。

项目结构：

然后配置一下jdbc.properties

druid.driverClassName=com.mysql.cj.jdbc.Driver
druid.url=jdbc:mysql://127.0.0.1:3306/cyl?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC
druid.username=root
druid.password=123456
druid.initialSize=10
druid.minIdle=6
druid.maxActive=50
druid.maxWait=60000

pom依赖：

<dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>test</scope></dependency><!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core --><dependency><groupId>org.mybatis.generator</groupId><artifactId>mybatis-generator-core</artifactId><version>1.3.7</version></dependency><!-- mybatis依赖 --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.4.6</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>1.7.21</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.27</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version></dependency><!-- 持久层依赖 begin --><!-- spring ioc组件需要的依赖包 --><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>4.3.13.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>4.3.13.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>4.3.13.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-expression</artifactId><version>4.3.13.RELEASE</version></dependency><!-- spring 事务管理和JDBC依赖包 --><dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>4.3.13.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>4.3.13.RELEASE</version></dependency><!-- mysql数据库驱动包 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.27</version></dependency><!-- druid连接池的依赖包 --><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.0.29</version></dependency><!-- mybatis依赖 --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.4.6</version></dependency><!-- mybatis和spring的整合依赖 --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.3.2</version></dependency><!-- 持久层依赖 end --><!-- 业务层依赖 begin --><!-- 基于AspectJ的aop依赖 --><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId><version>4.3.13.RELEASE</version></dependency><dependency><groupId>aopalliance</groupId><artifactId>aopalliance</artifactId><version>1.0</version></dependency><!-- 业务层依赖 end --><!-- 表现层依赖 begin --><!-- SpringMVC 相关包 --><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>4.3.13.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>4.3.13.RELEASE</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.2</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><!-- 表现层依赖 end --><!-- 单元测试依赖 begin --><!-- spring 单元测试组件包 --><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>4.3.13.RELEASE</version></dependency><!-- 单元测试Junit --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version></dependency><!-- 单元测试依赖 end --><!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core --><dependency><groupId>org.mybatis.generator</groupId><artifactId>mybatis-generator-core</artifactId><version>1.3.7</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>1.7.21</version></dependency><!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind --><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.8.9</version></dependency><!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind --><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.8.9</version></dependency><!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core --><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-core</artifactId><version>2.8.9</version></dependency><!--fastJson是一个JSON的处理工具包，由阿里巴巴公司研发推出。我们使用它将List或者Map转换成JSON对象--><!-- https://mvnrepository.com/artifact/com.alibaba/fastjson --><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.34</version></dependency></dependencies>