SpringMVC 搭建

Spring MVC框架是一个基于请求驱动的Web框架，而且使用了前端控制器模式来进行设计，再根据请求映射规则分发给相应的页面控制器（动做/处理器）进行处理。
Spring MVC框架将数据、业务和视图进行分离，减小不一样模块以前的耦合，能够快速的开发Web项目。

注意事项：
    1. 启动。Spring MVC先启动contextConfigLocation装载bean，最后启动servlet装载Controller。
    2. 事务。在applicationContext.xml中不能扫描Controller，由于此时Service尚未装配事务，此时获得的Service是没有事务的，servlet.xml中只扫描Controller，设置use-default-filters为false或者使用exclude-filter排除Service。 
    3. Controller返回json。Controller返回json必需依赖jackson。

建立Spring MVC项目：
    1. 建立webapp项目
    建立webapp项目后会在webapp/WEB-INF下默认生成web.xml，web.xml为服务的启动配置文件。

    2. 配置web.xml

<web-app>
    <display-name>Archetype Created Web Application</display-name>

    <context-param>
        <param-name>log4jConfig</param-name>
        <param-value>classpath:/log4j.properties</param-value>
    </context-param>

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

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>WEB-INF/springmvc-servlet.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>

    <session-config>
        <session-timeout>30</session-timeout>
    </session-config>
</web-app>

    3. 配置applicationContext.xml

<context:component-scan base-package="com.aaron">
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>

<!--rdx.xml中配置事务-->
<import resource="classpath:/spring/rds.xml"/>
<import resource="classpath:/spring/redis.xml"/>

   
    4. 配置SpringMVC-servlet.xml

<context:component-scan base-package="com.aaron">
    <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Service"/>
</context:component-scan>

<mvc:annotation-driven/>
<mvc:resources mapping="/image/**" location="/static/image/" />
<mvc:resources mapping="/css/**" location="/static/css/" />
<mvc:resources mapping="/js/**" location="/static/js/" />

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/" />
    <property name="suffix" value=".jsp" />
</bean>

    5. rds.xml配置事务

<!-- database transaction manager -->
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory" />
</bean>

<bean id="persistenceExceptionTranslationPostProcessor"
      class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />

<tx:annotation-driven transaction-manager="transactionManager" />

    6. 建立Controller和Service

@Controller
public class HelloController {
}

@Service
@Transactional(value= “transactionManager”)
public class HelloService {
}

   
    7. 配置pom.xml选择Jetty或者Tomcat plugin

<plugin>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-maven-plugin</artifactId>
    <version>${jetty.version}</version>
    <configuration>
        <httpConnector>
            <port>8080</port>
        </httpConnector>
        <webAppConfig>
            <contextPath>${server.path}</contextPath>
        </webAppConfig>
        <scanIntervalSeconds>5</scanIntervalSeconds>
    </configuration>
</plugin>

<!--<plugin>
    <groupId>org.apache.tomcat.maven</groupId>
    <artifactId>tomcat7-maven-plugin</artifactId>
    <version>${tomcat.version}</version>
    <configuration>
        <port>8080</port>
        <path>${server.path}</path>
        <uriEncoding>UTF-8</uriEncoding>
        <server>tomcat7</server>
    </configuration>
</plugin>-->

    8. 运行和打包
    运行：
    使用Jetty:run 或者 Tomcat7:run

    打包：
    jar包：
    pom.xml:
    <packaging>jar</packaging>

    war包：
    pom.xml:
    <packaging>war</packaging>