Spring MVC 配置总结

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学习Java Web也有一小段时间了，中间走了好多的弯路。今天总结一下这段时间的收获。
一开始我学习Web编程是从PHP开始的，PHP在一开始需要的配置不是很多（也有可能是我工作的那家公司已经配置好了框）。而且在编程的时候，只需要一种PHP脚本语言就足够了。无论是在MVC的哪一层。
但是Java Web编程一上来就是大量的配置，对于一个新手来说，很容易让人摸不到头绪。之前并没有接触过Java开发，对于Java语言本身，SSH架构都是完全的不了解。一开始就直接接触Spring MVC压力有点大。不过好在学校有个非常好的高手朋友对我进行指导，减轻了不少压力，也让我能够快速的认识到自己的不足和错误。

今天主要总结一下子Spring MVC在配置上的一些规范和技巧，以便以后的查阅和，也是对现有知识的巩固。

webxml
spring-mvcxml
application-contextxml

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_3_0.xsd"    id="WebApp_ID" version="3.0">    <!-- 配置文件标签启动顺序 context-param -> listerner -> fileter -> servlet -->    <!--定义了WEB应用的名字-->    <display-name>SpringMVCApplication</display-name>    <!-- 程序的初始进入页面 -->    <welcome-file-list>        <welcome-file>index.jsp</welcome-file>    </welcome-file-list>    <!-- SpirngMVC 配置 -->    <servlet>        <servlet-name>spring-mvc</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>/WEB-INF/config/spring-mvc.xml</param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>default</servlet-name>        <url-pattern>/templates/*</url-pattern>    </servlet-mapping>    <servlet-mapping>        <servlet-name>spring-mvc</servlet-name>        <url-pattern>/</url-pattern>    </servlet-mapping>    <!-- Spring 配置 -->    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>        <!-- <listener-class>org. springframework.web.util.IntrospectorCleanupListener</listener-class> -->    </listener>    <!-- 指定Spring Bean的配置文件所在目录。默认配置在WEB-INF目录下 -->    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>/WEB-INF/config/application-context.xml</param-value>    </context-param>    <!-- 配置字符集 -->    <filter>        <filter-name>encodingFilter</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>encodingFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <!-- 配置Spring的Log4jConfigListener -->    <context-param>        <param-name>log4jConfigLocation</param-name>        <param-value>/WEB-INF/config/log4j.properties</param-value>    </context-param>    <listener>        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>    </listener></web-app>

Spring MVC的入口是DispatcherServlet，所以在配置web.xml的时候一定首先配置。这里的Spring MVC的配置文件的默认路径是WEB-INF目录下，默认名称为[servlet name]-servlet.xml，比如我们的servlet名字为spring-mvc，那么配置文件的名字就应该为spring-mvc-servlet.xml。我们还可以自定义Spring MVC配置文件的路径和名字，通过<init-param>

<init-param>    <param-name>contextConfigLocation</param-name>    <param-value>/WEB-INF/config/spring-mvc.xml</param-value></init-param>

这样我们就将Spring MVC的配置文件命名为spring-mvc.xml，并定位于/WEB-INF/config目录下。
<load-on-startup>1</load-on-startup>的意义是在启动时就加载Spring MVC的Servlet。

<context-param>        <param-name>contextConfigLocation</param-name>        <param-value>/WEB-INF/config/application-context.xml</param-value>    </context-param>

这一段代码，指定了Spring 配置文件的位置。

下面我们来分别总结一下Spring MVC和Spring的配置。

spring-mvc.xml

<?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:p="http://www.springframework.org/schema/p"    xmlns:context="http://www.springframework.org/schema/context"    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"    xmlns:tx="http://www.springframework.org/schema/tx"    xsi:schemaLocation="http://www.springframework.org/schema/beans           http://www.springframework.org/schema/beans/spring-beans-4.0.xsd        http://www.springframework.org/schema/context                     http://www.springframework.org/schema/context/spring-context-4.0.xsd        http://www.springframework.org/schema/mvc        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">    <!-- 注解扫描包 -->    <context:component-scan base-package="com.controller" />    <!-- 开启注解 -->    <mvc:annotation-driven/>    <!-- 静态资源访问 -->    <mvc:resources location="/img/" mapping="/img/**" />    <mvc:resources location="/js/" mapping="/js/**" />    <!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 -->    <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="prefix" value="/" />        <property name="suffix" value=".jsp" />    </bean>     <!-- 上传文件相关的配置 -->    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">        <property name="defaultEncoding" value="utf-8" />        <property name="maxUploadSize" value="104857600" />        <property name="maxInMemorySize" value="4096" />    </bean></beans>

application-context.xml

<?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:p="http://www.springframework.org/schema/p"    xmlns:context="http://www.springframework.org/schema/context"    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"    xmlns:tx="http://www.springframework.org/schema/tx"    xsi:schemaLocation="http://www.springframework.org/schema/beans           http://www.springframework.org/schema/beans/spring-beans-4.0.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        http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop-4.0.xsd        http://www.springframework.org/schema/mvc        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">    <!-- 需要Spring注解扫描的类包 -->    <context:component-scan base-package="com" />    <!-- 加载JDBC配置文件 -->    <context:property-placeholder location="/WEB-INF/config/jdbc.properties" />    <!-- 连接数据库参数 -->    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">        <property name="driverClassName" value="${database.driver}" />        <property name="url" value="${database.url}" />        <property name="username" value="${database.user}" />        <property name="password" value="${database.password}" />    </bean>    <!-- 通过dataSource获取sessionFactory、获取实体、 -->    <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">        <property name="dataSource" ref="dataSource" />        <property name="hibernateProperties">            <props>                <prop key="hibernate.dialect">${hibernate.dialect}</prop>                <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>                <prop key="hibernate.format_sql">${hibernate.format_sql}</prop>                <prop key="hibernate.hbm2ddl.auto">update</prop>                <prop key="hibernate.jdbc.batch_size">50</prop>            </props>        </property>        <property name="packagesToScan" value="com.entity" />    </bean>    <!-- 声明事务 -->    <bean name="transactionAdvice" class="org.springframework.orm.hibernate4.HibernateTransactionManager">        <property name="sessionFactory" ref="sessionFactory"></property>    </bean>    <!-- 配置Spring事务传播特性 -->    <tx:advice id="txAdvice" transaction-manager="transactionAdvice">        <tx:attributes>            <tx:method name="import*" propagation="REQUIRED" />            <tx:method name="init*" propagation="REQUIRED" />            <tx:method name="save*" propagation="REQUIRED" />            <tx:method name="create*" propagation="REQUIRED" />            <tx:method name="delete*" propagation="REQUIRED" />            <tx:method name="update*" propagation="REQUIRED" />            <tx:method name="add*" propagation="REQUIRED" />            <tx:method name="get*" read-only="true" />            <tx:method name="load*" read-only="true" />            <tx:method name="find*" read-only="true" />            <tx:method name="*" read-only="true" />        </tx:attributes>    </tx:advice>    <!-- 装配HibernateTemplate实例 -->    <bean id="hibernateTemplate" class="org.springframework.orm.hibernate4.HibernateTemplate">        <constructor-arg ref="sessionFactory" />    </bean>    <!-- 配置哪些类的哪些方法参与事务 -->    <aop:config>        <aop:advisor pointcut="execution(* com..*.*(..))"            advice-ref="txAdvice" />    </aop:config></beans>

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