一，整合思路及步驟
1. 搭建工程環境
a. 創建一個動態的web工程
b. 加入 Spring+Springmvc相關的jar包
c. 加入 Mybatis 相關的jar包
d. 加入 Mybatis 與Spring 的整合適配包
e. 加入 連接池、 數據庫驅動、 日誌 等.
2. 搭建Spring + Springmvc的 環境:
a. 在web.xml中配置 :
1). 配置創建Spring容器對象的監聽器 ContextLoaderListener
2). 配置Springmvc的前端控制器 DispatcherServlet
3). 配置解決中文亂碼過濾器 CharacterEncodingFilter
4). 配置REST 過濾器 HiddenHttpMethodFilter
<?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_2_5.xsd" id="WebApp_ID" version="2.5">
<!-- 字符編碼過濾器 -->
<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>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- REST 過濾器 -->
<filter>
<filter-name>HiddenHttpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>HiddenHttpMethodFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 創建Spring容器對象的監聽器 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Springmvc的前端控制器 -->
<servlet>
<servlet-name>springDispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springDispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
b. 編寫Spring框架的配置文件 spring.xml
1). 組件掃描
2). 數據源
3). 事務
4). Spring整合MyBatis
<?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:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
xsi:schemaLocation="http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd
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-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
<!-- 組件掃描 -->
<context:component-scan base-package="com.atguigu.ssm">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!-- 數據源 -->
<context:property-placeholder location="classpath:db.properties"/>
<bean id="myDataSource" class="com.alibaba.druid.pool.DruidDataSource">
<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>
<!-- 事務管理 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="myDataSource"></property>
</bean>
<tx:annotation-driven />
<!-- 整合MyBatis -->
<!-- 1.SqlSession對象的創建及管理
MyBatis : SqlSessionFactory(mybatis-config.xml)==>openSession()==>SqlSession
SSM : SqlSessionFactoryBean ==>getObject()
-->
<bean class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 1.注入Mybatis的配置文件 -->
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
<!-- 2.注入數據源 -->
<property name="dataSource" ref="myDataSource"></property>
<!-- 別名處理
<property name="typeAliasesPackage" value="com.atguigu.ssm.beans"></property>
-->
<!-- 3.引入SQL映射文件 -->
<property name="mapperLocations" value="classpath:mybatis/mapper/*.xml"></property>
</bean>
<!-- 2. Mapper接口代理實現類對象的創建及管理
MyBatis: SqlSession.getMapper(xxxMapper.class)
SSM : MapperScannerConfigurer ,
爲指定包下的Mapper接口批量創建代理實現類對象並管理到Spring容器中
eg: EmployeeMapper ==>$ProxyN ==> IOC容器中bean的id: employeeMapper
-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.atguigu.ssm.mapper"></property>
</bean>
<!-- <mybatis-spring:scan base-package="com.atguigu.ssm.mapper"/> -->
</beans>
c. 編寫Springmvc框架的配置文件 springmvc.xml
1). 組件掃描
2). 視圖解析器
3). <mvc:xxx>
<?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/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
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-4.0.xsd">
<!-- 組件掃描 -->
<context:component-scan base-package="com.atguigu.ssm" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!-- 視圖解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!-- mvc 解決靜態資源上傳問題-->
<mvc:default-servlet-handler/>
<mvc:annotation-driven/>
</beans>
3. 搭建MyBatis框架的環境
a. 全局配置文件 mybatis-config.xml
<?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>
<!-- 2. settings : 很多重要的設置項，可以改變Mybatis的運行行爲 -->
<settings>
<!-- 映射下劃線到駝峯命名 last_name==>lastName -->
<setting name="mapUnderscoreToCamelCase" value="true"/>
<!-- 開啓延遲加載 -->
<setting name="lazyLoadingEnabled" value="true"/>
<!-- 設置按需加載 還是 全部加載 -->
<setting name="aggressiveLazyLoading" value="false"/>
<!-- 二級緩存 -->
<setting name="cacheEnabled" value="true"/>
</settings>
<!-- 3. typeAliases:別名處理
alias: 指定別名。 如果不指定，默認的別名是類名(不區分大小寫)
package: 爲指定包以及子包下的類取默認的別名
-->
<typeAliases>
<package name="com.atguigu.ssm.beans"/>
</typeAliases>
<!-- 註冊插件 -->
<plugins>
<plugin interceptor="com.github.pagehelper.PageInterceptor"></plugin>
</plugins>
</configuration>
b. JavaBean、 Mapper接口 、 映射文件
4. Spring 整合 MyBatis:
a. SqlSession對象的創建及管理（交由spring管理，在spring.xml文件中整合，上面有例子）
b. Mapper接口代理實現類對象的創建及管理（交由spring管理，在spring.xml文件中整合，上面有例子）