SSM整合，是Spring、SpringMVC、MyBatis三种框架的整合。
Spring是一种轻量级的、以IOC（控制反转）和AOP（面向切面）为主导的一种容器框架；
SpringMVC是一种将模型、视图、控制器、分配器等分角色管理的一种前后端交互框架；
MyBatis是一种支持定制SQL语句、存储过程以及高级映射的持久化框架
Spring作为容器，将后两者进行管理整合，实现统一化管理。
1.所需jar包
主要的jar包
其余jar包请根据不同需要酌情调度（例如log4j、数据库驱动、连接池等）
2.配置结构
3.SpringMVC的配置（spring-servlet.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:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
<!-- spring 扫描包下的所有类，让Spring注解生效 -->
<context:component-scan base-package="dao,service,controller"/>
<tx:annotation-driven/>
<!-- 配置视图解析器 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
4.MyBatis的配置（mybatis-config.xml）:
在单独配置MyBatis时，需配置诸如引用jdbc文件、数据源信息、映射文件位置等；
在SSM整合中，上述配置移交给spring进行管理，简化了MyBatis的配置文件内容
<?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>
<!-- setting中有各种可设置参数，可进入如下官网进行具体查询 -->
<!-- http://www.mybatis.org/mybatis-3/zh/configuration.html -->
<settings>
<setting name="lazyLoadingEnabled" value="false"/>
</settings>
<!-- 在此指定对应对应的package，其中的类的名称即可作为mapper文件中的别名 -->
<typeAliases>
<package name="pojo"/>
</typeAliases>
</configuration>
5.Spring的配置（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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd">
<!-- properties文件读取配置 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- JNDI获取数据源（使用dbcp连接池） -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close" scope="singleton">
<property name="driverClassName" value="${jdbc.driver}"></property>
<property name="url" value="${jdbc.url}"></property>
<property name="username" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
</bean>
<!-- 事务管理 @Transactional/AOP -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 配置mybatis SQLSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
<!-- <property name="mapperLocations" value="classpath:dao/*.xml"></property> -->
</bean>
<!-- 配置dao -->
<!-- <bean id="employeeMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="mapperInterface" value="dao.EmployeeMapper"/>
<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
</bean> -->
<!-- 批量扫描指定package包下的mapper接口并生成实例 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="dao"/>
</bean>
</beans>
6.web.xml的配置:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name></display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!-- 配置SpringMVC的DispatcherServlet -->
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 处理字符编码 -->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<!-- 强制字符编码 -->
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 设置spring配置文件路径 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:application*.xml</param-value>
</context-param>
<!-- spring配置 -->
<!-- 对前面的context-param监听 -->
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<!-- log4j -->
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>classpath:log4j.properties</param-value>
</context-param>
<!-- spring加载log4j的监听 -->
<listener>
<listener-class>
org.springframework.web.util.Log4jConfigListener
</listener-class>
</listener>
</web-app>