Jpetstore研究（二）配置文件分析

于 2013-05-12 09:11:14 发布
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分类专栏： Spring
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本文链接：https://blog.youkuaiyun.com/just_lion/article/details/8902138
本文详细介绍了如何配置Web应用使用Spring MVC框架，包括设置日志系统、配置Servlet、匹配URL、设置视图解析器、创建公共和受保护的控制器、引入依赖注入和数据源配置等关键步骤。

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1> web.xml

配置log4j:

       <!--
		- Key of the system property that should specify the root directory of this
		- web app. Applied by WebAppRootListener or Log4jConfigListener.
	-->
	<context-param>
		<param-name>webAppRootKey</param-name>
		<param-value>petstore.root</param-value>
	</context-param>

	<!--
		- Location of the Log4J config file, for initialization and refresh checks.
		- Applied by Log4jConfigListener.
	-->
	<context-param>
		<param-name>log4jConfigLocation</param-name>
		<param-value>/WEB-INF/log4j.properties</param-value>
	</context-param>
    <!-- Leave the listener commented-out if using JBoss -->
    <!--
    <listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>
    -->

配置好webAppRootKey可以在log4j.properties中引用它作为应用的根目录，如log4j.appender.logfile.File=${petstore.root}/WEB-INF/petstore.log

配置需要加载的配置文件，默认加载的是/WEB-INF/applicationContext.xml

<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/dataAccessContext-local.xml /WEB-INF/applicationContext.xml</param-value>
</context-param>
<listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

配置dispatcherservlet，其对应的配置文件为：petstore-servlet.xml

<!--
		- Spring web MVC servlet that dispatches requests to registered handlers.
		- Has its own application context, by default defined in "{servlet-name}-servlet.xml",
		- i.e. "petstore-servlet.xml" in this case.
		-
		- A web app can contain any number of such servlets.
		- Note that this web app has a shared root application context, serving as parent
		- of all DispatcherServlet contexts.
	-->
	<servlet>
		<servlet-name>petstore</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<load-on-startup>2</load-on-startup>
	</servlet>

配置匹配的URL:

<servlet-mapping>
		<servlet-name>petstore</servlet-name>
		<url-pattern>*.do</url-pattern>
</servlet-mapping>

配置欢迎页面：

<welcome-file-list>
		<welcome-file>index.html</welcome-file>
</welcome-file-list>


2>  petstore-servlet.xml

配置视图：

<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
		<property name="prefix" value="/WEB-INF/jsp/spring/"/>
		<property name="suffix" value=".jsp"/>
</bean>

配置controller:

<!-- ========================= DEFINITIONS OF PUBLIC CONTROLLERS ========================= -->

	<bean id="defaultHandlerMapping" class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>

	<bean name="/shop/addItemToCart.do" class="org.springframework.samples.jpetstore.web.spring.AddItemToCartController">
		<property name="petStore" ref="petStore"/>
	</bean>
        <!-- 注入视图名称，实现参数化，而不是硬编码 -->
	<bean name="/shop/checkout.do" class="org.springframework.samples.jpetstore.web.spring.ViewCartController">
		<property name="successView" value="Checkout"/>
	</bean>
        <!-- 不需要具体的controller处理逻辑，直接返回视图index.jsp -->
	<bean name="/shop/index.do" class="org.springframework.web.servlet.mvc.ParameterizableViewController">
		<property name="viewName" value="index"/>
	</bean>
        <!-- validator与successView来自父类 -->
	<bean name="/shop/newAccount.do" class="org.springframework.samples.jpetstore.web.spring.AccountFormController">
		<property name="petStore" ref="petStore"/>
		<property name="validator" ref="accountValidator"/>
		<property name="successView" value="index"/>
	</bean>

	<bean name="/shop/removeItemFromCart.do" class="org.springframework.samples.jpetstore.web.spring.RemoveItemFromCartController"/>

	<bean name="/shop/signoff.do" class="org.springframework.samples.jpetstore.web.spring.SignoffController"/>

	<bean name="/shop/searchProducts.do" class="org.springframework.samples.jpetstore.web.spring.SearchProductsController">
		<property name="petStore" ref="petStore"/>
	</bean>

	<bean name="/shop/signon.do" class="org.springframework.samples.jpetstore.web.spring.SignonController">
		<property name="petStore" ref="petStore"/>
	</bean>

	<bean name="/shop/signonForm.do" class="org.springframework.web.servlet.mvc.ParameterizableViewController">
		<property name="viewName" value="SignonForm"/>
	</bean>

	<bean name="/shop/updateCartQuantities.do" class="org.springframework.samples.jpetstore.web.spring.UpdateCartQuantitiesController"/>

	<bean name="/shop/viewCart.do" class="org.springframework.samples.jpetstore.web.spring.ViewCartController">
		<property name="successView" value="Cart"/>
	</bean>

	<bean name="/shop/viewCategory.do" class="org.springframework.samples.jpetstore.web.spring.ViewCategoryController">
		<property name="petStore" ref="petStore"/>
	</bean>

	<bean name="/shop/viewItem.do" class="org.springframework.samples.jpetstore.web.spring.ViewItemController">
		<property name="petStore" ref="petStore"/>
	</bean>

	<bean name="/shop/viewProduct.do" class="org.springframework.samples.jpetstore.web.spring.ViewProductController">
		<property name="petStore" ref="petStore"/>
	</bean>

配置安全保护的controller:

<!-- ========================= DEFINITIONS OF PROTECTED CONTROLLERS ========================= -->

	<bean id="secureHandlerMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
		<property name="interceptors">
			<list>
				<ref bean="signonInterceptor"/>
			</list>
		</property>
		<property name="urlMap">
			<map>
				<entry key="/shop/editAccount.do" value-ref="secure_editAccount"/>
				<entry key="/shop/listOrders.do" value-ref="secure_listOrders"/>
				<entry key="/shop/newOrder.do" value-ref="secure_newOrder"/>
				<entry key="/shop/viewOrder.do" value-ref="secure_viewOrder"/>
			</map>
		</property>
	</bean>

	<bean id="signonInterceptor" class="org.springframework.samples.jpetstore.web.spring.SignonInterceptor"/>

	<bean id="secure_editAccount" class="org.springframework.samples.jpetstore.web.spring.AccountFormController">
		<property name="petStore" ref="petStore"/>
		<property name="validator" ref="accountValidator"/>
		<property name="successView" value="index"/>
	</bean>

	<bean id="secure_listOrders" class="org.springframework.samples.jpetstore.web.spring.ListOrdersController">
		<property name="petStore" ref="petStore"/>
	</bean>

	<bean id="secure_newOrder" class="org.springframework.samples.jpetstore.web.spring.OrderFormController">
		<property name="petStore" ref="petStore"/>
		<property name="validator" ref="orderValidator"/>
	</bean>

	<bean id="secure_viewOrder" class="org.springframework.samples.jpetstore.web.spring.ViewOrderController">
		<property name="petStore" ref="petStore"/>
	</bean>

首先增加了一层过滤器
signonInterceptor
实现了preHandle的功能，然后列出需要保护的controller，查看signonInterceptor可知，在用户没有登录的情况下访问上面受保护的.do时会跳到SignonForm,并且登录成功后再跳到这个.do页面

3> applicationContext.xml

<!-- Configurer that replaces ${...} placeholders with values from properties files -->
	<!-- (in this case, mail and JDBC related properties) -->
	<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="locations">
			<list>
				<value>WEB-INF/mail.properties</value>
				<value>WEB-INF/jdbc.properties</value>
			</list>
		</property>
	</bean>

PropertyPlaceholderConfigurer可以将上下文（配置文件）中的属性值放在另一个单独的标准java Properties文件中去。在XML文件中用${key}替换指定的properties文件中的值。这样的话，只需要对properties文件进行修改，而不用对xml配置文件进行修改。

这样就可以以比如${jdbc.url}的形式来引用jdbc.properties里的内容，dataAccessContext-local.xml就是这样来配置数据源。

配置validator:

<!-- Generic validator for Account objects, to be used for example by the Spring web tier -->
	<bean id="accountValidator" class="org.springframework.samples.jpetstore.domain.logic.AccountValidator"/>

	<!-- Generic validator for Order objects, to be used for example by the Spring web tier -->
	<bean id="orderValidator" class="org.springframework.samples.jpetstore.domain.logic.OrderValidator"/>

配置依赖注入： 

<bean id="petStore" class="org.springframework.samples.jpetstore.domain.logic.PetStoreImpl">
		<property name="accountDao" ref="accountDao"/>
		<property name="categoryDao" ref="categoryDao"/>
		<property name="productDao" ref="productDao"/>
		<property name="itemDao" ref="itemDao"/>
		<property name="orderDao" ref="orderDao"/>
	</bean>

各个Dao的bean定义在dataAccessContext-local.xml


4> dataAccessContext-local.xml

配置数据源：

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
		<property name="driverClassName" value="${jdbc.driverClassName}"/>
		<property name="url" value="${jdbc.url}"/>
		<property name="username" value="${jdbc.username}"/>
		<property name="password" value="${jdbc.password}"/>
</bean>
<!-- Transaction manager for a single JDBC DataSource -->
    <!-- (see dataAccessContext-jta.xml for an alternative) -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

配置ibatis，定义bean sqlMapClient

<!-- SqlMap setup for iBATIS Database Layer -->
	<bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
		<property name="configLocation" value="WEB-INF/sql-map-config.xml"/>
		<property name="dataSource" ref="dataSource"/>
	</bean>

定义DAO: 

        <bean id="accountDao" class="org.springframework.samples.jpetstore.dao.ibatis.SqlMapAccountDao">
		<property name="sqlMapClient" ref="sqlMapClient"/>
	</bean>

	<bean id="categoryDao" class="org.springframework.samples.jpetstore.dao.ibatis.SqlMapCategoryDao">
		<property name="sqlMapClient" ref="sqlMapClient"/>
	</bean>

	<bean id="productDao" class="org.springframework.samples.jpetstore.dao.ibatis.SqlMapProductDao">
		<property name="sqlMapClient" ref="sqlMapClient"/>
	</bean>

	<bean id="itemDao" class="org.springframework.samples.jpetstore.dao.ibatis.SqlMapItemDao">
		<property name="sqlMapClient" ref="sqlMapClient"/>
	</bean>

	<bean id="orderDao" class="org.springframework.samples.jpetstore.dao.ibatis.SqlMapOrderDao">
		<property name="sqlMapClient" ref="sqlMapClient"/>
		<property name="sequenceDao" ref="sequenceDao"/>
	</bean>

	<bean id="sequenceDao" class="org.springframework.samples.jpetstore.dao.ibatis.SqlMapSequenceDao">
		<property name="sqlMapClient" ref="sqlMapClient"/>
	</bean>




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