MyBatis框架 第6章：SSM框架整合

第6章：SSM框架整合

6.1 整合注意事项

1. 查看不同MyBatis版本整合Spring时使用的适配包；

    2.  下载整合适配包

https://github.com/mybatis/spring/releases

    3.  官方整合示例，jpetstore

https://github.com/mybatis/jpetstore-6

6.2整合思路、步骤

1. 搭建环境

创建一个动态的WEB工程

导入SSM需要使用的jar包

导入整合适配包

导入其他技术的一些支持包  连接池 数据库驱动  日志....  

     2.  Spring + Springmvc

在web.xml中配置:   Springmvc的前端控制器   实例化Spring容器的监听器   字符编码过滤器  REST 过滤器

创建Spring的配置文件: applicationContext.xml:组件扫描、 连接池、 事务.....

创建Springmvc的配置文件: springmvc.xml : 组件扫描、 视图解析器

      3. MyBatis

创建MyBatis的全局配置文件

编写实体类  Mapper接口  Mapper映射文件

      4.  Spring + MyBatis ：

MyBatis的 SqlSession的创建 .

MyBatis的 Mapper接口的代理实现类

      5.  测试:  REST CRUD

课堂: 查询所有的员工信息,列表显示

课下: 增删改

6.3整合的配置

6.3.1 web.xml

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">    <filter>   <filter-name>CharacterEncodingFilterfilter-name>   <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>   <init-param>   <param-name>encodingparam-name>   <param-value>UTF-8param-value>   init-param>  filter>  <filter-mapping>   <filter-name>CharacterEncodingFilterfilter-name>   <url-pattern>/*url-pattern>  filter-mapping>      <filter>   <filter-name>HiddenHttpMethodFilterfilter-name>   <filter-class>org.springframework.web.filter.HiddenHttpMethodFilterfilter-class>  filter>  <filter-mapping>   <filter-name>HiddenHttpMethodFilterfilter-name>   <url-pattern>/*url-pattern>  filter-mapping>   <context-param> <param-name>contextConfigLocationparam-name> <param-value>classpath:applicationContext.xmlparam-value> context-param>   <listener> <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>     listener>     <servlet> <servlet-name>springDispatcherServletservlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class> <init-param> <param-name>contextConfigLocationparam-name> <param-value>classpath:springmvc.xmlparam-value> init-param> <load-on-startup>1load-on-startup> servlet> <servlet-mapping> <servlet-name>springDispatcherServletservlet-name> <url-pattern>/url-pattern> servlet-mapping> web-app>

 

6.3.2 Spring配置

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">   <context:component-scan base-package="com.atguigu.ssm"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> context:component-scan>   <context:property-placeholder location="classpath:db.properties"/> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driver}">property> <property name="jdbcUrl" value="${jdbc.url}">property> <property name="user" value="${jdbc.username}">property> <property name="password" value="${jdbc.password}">property>   bean>   <bean id="dataSourceTransactionManager"  class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource">property> bean> <tx:annotation-driven transaction-manager="dataSourceTransactionManager"/> beans>

 

6.3.3 SpringMVC配置

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">      <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>        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/views/">property> <property name="suffix" value=".jsp">property>    bean>      <mvc:default-servlet-handler/>    <mvc:annotation-driven/> beans>

 

6.3.4 MyBatis配置

1. 全局文件的配置

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>      <settings>     <setting name="mapUnderscoreToCamelCase" value="true"/>     <setting name="jdbcTypeForNull" value="NULL"/>     <setting name="lazyLoadingEnabled" value="true"/>     <setting name="aggressiveLazyLoading" value="false"/>     <setting name="cacheEnabled" value="true"/>  settings> configuration>

 

    2.  SQL映射文件配置

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.atguigu.ssm.mapper.EmployeeMapper"> <select id="getAllEmps" resultMap="myEmpsAndDept" > select e.id eid, e.last_name,e.email,e.gender, d.id did, d.dept_name from tbl_employee e ,tbl_dept d where e.d_id = d.id select> <resultMap type="com.atguigu.ssm.beans.Employee" id="myEmpsAndDept"> <id column="eid" property="id"/> <result column="last_name" property="lastName"/> <result column="email" property="email"/> <result column="gender" property="gender"/>   <association property="dept" javaType="com.atguigu.ssm.beans.Department"> <id column="did" property="id"/> <result column="dept_name" property="departmentName"/> association> resultMap> mapper>

 

6.3.5 Spring 整合MyBatis 配置

<bean 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:mybatis/mapper/*.xml">property> <property name="typeAliasesPackage"                   value="com.atguigu.ssm.beans">property> bean> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.atguigu.ssm.mapper">property> bean>

 

6.4 整合测试

1. 编写页面，发送请求：http://localhost:8888/ssm/employees
2. 编写Handler,处理请求，完成响应
3. 在页面中获取数据，显示数据

 

 

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