整合的配置

【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">
 <!-- 字符编码过滤器 -->
 <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 过滤器 -->
 <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>
 
<!-- 实例化SpringIOC容器的监听器 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.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>

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">
    
    <!-- 组件扫描 -->
    <context:component-scan base-package="com.atguigu.ssm">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    
    <!-- 连接池 -->
    <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>
    
    <!-- 事务 -->
    <bean id="dataSourceTransactionManager" 
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <tx:annotation-driven transaction-manager="dataSourceTransactionManager"/>
</beans>

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">
  <!-- 组件扫描 -->
  <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>
   <!--视图解析器 -->
   <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/views/"></property>
    <property name="suffix" value=".jsp"></property>
   </bean>

   <mvc:default-servlet-handler/>
   <mvc:annotation-driven/>
</beans>

 

Mybatis配置

1.全局配置

<?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>
    <!--  Spring 整合 MyBatis 后， MyBatis中配置数据源，事务等一些配置都可以
         迁移到Spring的整合配置中。MyBatis配置文件中只需要配置与MyBatis相关
         的即可。
     -->
     <!-- settings: 包含很多重要的设置项     -->
       <settings>
         <!-- 映射下划线到驼峰命名 -->
         <setting name="mapUnderscoreToCamelCase" value="true"/>
         <!-- 设置Mybatis对null值的默认处理 -->
         <setting name="jdbcTypeForNull" value="NULL"/>
         <!-- 开启延迟加载 -->
         <setting name="lazyLoadingEnabled" value="true"/>
         <!-- 设置加载的数据是按需还是全部 -->
         <setting name="aggressiveLazyLoading" value="false"/>    
         <!-- 配置开启二级缓存 -->
         <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">
    <!-- public List<Employee> getAllEmps(); -->
    <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>

Spring整合Mybatis配置

<!-- Spring 整合 Mybatis -->
    <!--1. SqlSession  -->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 指定数据源 -->
        <property name="dataSource" ref="dataSource"></property>
        <!-- MyBatis的配置文件 -->
        <property name="configLocation" 
                 value="classpath:mybatis-config.xml"></property>
        <!-- MyBatis的SQL映射文件 -->
        <property name="mapperLocations" 
                 value="classpath:mybatis/mapper/*.xml"></property>
        <property name="typeAliasesPackage" 
                 value="com.atguigu.ssm.beans"></property>
    </bean>
    <!-- Mapper接口
        MapperScannerConfigurer 为指定包下的Mapper接口批量生成代理实现类.bean的默认id是接口名首字母小写. 
     -->
    <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"/> -->