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SSM项目中的配置文件5.web.xml

共分为五大配置文件：

1.mybatis-config.xml：

配置持久化类的别名，并指定SQL映射文件的位置

举例：

<!-- 类型别名设置 -->
<typeAliases>
	
	<typeAlias alias="Auser" type="com.po.Auser"></typeAlias>
	<typeAlias alias="Buser" type="com.po.Buser"></typeAlias>
	<typeAlias alias="GoodsType" type="com.po.GoodsType"></typeAlias>
	<typeAlias alias="Goods" type="com.po.Goods"></typeAlias>
	<typeAlias alias="Notice" type="com.po.Notice"></typeAlias>
	<typeAlias alias="Order" type="com.po.Order"></typeAlias>
</typeAliases> 

<!--映射文件的设置  -->
<mappers>
	<!-- 使用类路径引入 -->
	<mapper resource="com/mybatis/admin/AdminGoodsMapper.xml"/> 
	<mapper resource="com/mybatis/admin/AdminMapper.xml"/>
	<mapper resource="com/mybatis/admin/AdminNoticeMapper.xml"/> 
	<mapper resource="com/mybatis/admin/AdminOrderMapper.xml"/> 
	<mapper resource="com/mybatis/admin/AdminTypeMapper.xml"/> 
	<mapper resource="com/mybatis/admin/AdminUserMapper.xml"/> 
	<mapper resource="com/mybatis/before/CartMapper.xml"/>
	<mapper resource="com/mybatis/before/IndexMapper.xml"/>
	<mapper resource="com/mybatis/before/OrderMapper.xml"/>
	<mapper resource="com/mybatis/before/UserCenterMapper.xml"/>
	<mapper resource="com/mybatis/before/UserMapper.xml"/>

2.applicationContext.xml

配置了数据源，事务管理，Mybatis工厂，扫描包等内容

举例：

<!--配置dbcp数据源  -->
	<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
		<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
		<property name="url" value="jdbc:mysql://localhost:3306/springtest?characterEncoding=utf8"></property>
		<property name="username" value="root"></property>
		<property name="password" value="122526"></property>
		<property name="maxTotal" value="30"></property>
		<property name="maxIdle" value="10"></property>
		<property name="initialSize" value="5"></property>
	</bean>
	<!--配置事务管理器  -->
	<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource"></property>
	</bean>
	<!--开启事务注解 -->
	<tx:annotation-driven transaction-manager="txManager"/>
	
	<!--配置Mybatis sqlsession工厂，同时指定数据源，并与Mybatis完美结合  -->
	 <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource"></property>
		<property name="configLocation" value="classpath:mybatis-config.xml"></property>
	</bean>
	<!--配置Mapper扫描器  -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.dao"></property>
		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
	</bean>
	 <context:component-scan base-package="com.service"></context:component-scan>	 	
</beans>

3.log4j.properties

Mybatis默认使用log4j输出日志信息，如果开发者需要查看控制台输出的SQL语句，需要配置日志文件

举例：

## Global logging configuration
#log4j.rootLogger=ERROR, stdout
## Console output...
#log4j.appender.stdout=org.apache.log4j.ConsoleAppender
#log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
#log4j.appender.stdout.layout.ConversionPattern=%d [%t] %-5p - %m%n
#
#
#log4j.logger.com.zjm.dao=DEBUG

4.springmvc-servlet.xml

配置了控制层的包扫描，静态资源处理，视图解析器，文件上传，统一异常处理

<!-- 使用扫描机制，扫描包 -->
    	<context:component-scan base-package="com.controller" />
    	<mvc:annotation-driven />
    	
        <!-- 静态资源需要单独处理，不需要dispatcher servlet -->  
        <mvc:resources location="/css/" mapping="/css/**"></mvc:resources> 
        <mvc:resources location="/images/" mapping="/images/**"></mvc:resources> 
        
        <!-- 查看图片时，logos文件夹不需要dispatcher servlet --> 
        <mvc:resources location="/logos/" mapping="/logos/**"></mvc:resources>
        
    	<!-- 配置视图解析器 -->
    	<bean
    		class="org.springframework.web.servlet.view.InternalResourceViewResolver"
    		id="internalResourceViewResolver">
    		<!-- 前缀 -->
    		<property name="prefix" value="/WEB-INF/jsp/" />
    		<!-- 后缀 -->
    		<property name="suffix" value=".jsp" />
    	</bean>
    	
    	<!-- 配置MultipartResolver 用于文件上传 使用spring的CommosMultipartResolver -->  
        <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"  
            p:defaultEncoding="UTF-8"  
            p:maxUploadSize="5400000"  
            p:uploadTempDir="fileUpload/temp" 
         > 
         
          <!--D:\spring mvc workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\fileUpload  -->  
        </bean> 
        <!-- defaultEncoding="UTF-8" 是请求的编码格式，默认为iso-8859-1
    maxUploadSize="5400000" 是允许上传文件的最大值，单位为字节
    uploadTempDir="fileUpload/temp" 为上传文件的临时路径--> 
    	<!-- 托管MyExceptionHandler -->
    	<bean class="com.exception.MyExceptionHandler"/>

5.web.xml

配置了ApplicationContext容器，Springmvc的DispatcherServlet以及字符编码过滤器

举例：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
  <display-name>maven20</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
 <!--========================spring Ioc 的启动配置  =============================-->
  <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 的启动配置============================== -->
    <servlet>
  	<servlet-name>springmvc</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<init-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>classpath:springmvc-config.xml</param-value>
  	</init-param>
  	<load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
  	<servlet-name>springmvc</servlet-name>
  	<url-pattern>/</url-pattern>
  </servlet-mapping>
   <!--===========================中文乱码过滤器配置  ====================================-->
  <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>
  		<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> 
</web-app>
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