Jeecms源码分析(三)

本节主要分析Spring + FreeMarker的集成。


先介绍一下 spring+freemarker的集成主要涉及以下配置项:

1、配置 FreeMarkerConfigurer

<bean id="freeMarkerConfigurer" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">         ……    </bean>
 

通过 freemarkerSettings 属性,也能够设置其他 FreeMarker 的配置。例如, FreeMarker 默认每隔 5 秒检查模板是否被更新,如果已经更新了,就会重新加载并分析模板。但经常检查模板是否更新可能比较耗时。如果你的应用运行在生产模式下,而且你预期模板不会经常更新,则可以将更新的延迟时间延长至一个小时或者更久。

可以通过为 freemarkerSettings 属性设置 template_update_delay 达到这一目的。例如:

 

 <property name="freemarkerSettings">

      <props>

        <prop key="template_update_delay">3600</prop>

      </props>

    </property>
 

设置 template_update_delay 3600 (秒),因此 FreeMarker 只有在 1 个小时之后才检查模板是否更新。

 

2、解析 FreeMarker 视图

<bean id="viewResolver" class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">

    <property name="suffix"><value>.ftl</value></property>

  </bean>
 

将请求和会话属性作为变量暴露给 FreeMarker 模板使用。要做到这一点,可以设置 exposeRequestAttributes 或者 exposeSessionAttributes true

<property name="exposeRequestAttributes">

      <value>true</value>

    </property>

    <property name="exposeSessionAttributes">

      <value>true</value>

    </property>

 
 

使用这些宏,必须设置 FreeMarkerViewResolver exposeMacroHelpers 属性为 true

 

<property name="exposeSpringMacroHelpers">

      <value>true</value>

    </property>
 

 

3、 FreeMarker 中绑定表单域

 

<@spring.bind "command.phone" />

  phone: <input type="text"

      name="${spring.status.expression}"

      value="${spring.status.value}">

  <font color="#FF0000">${spring.status.errorMessage}</font><br>

 

  <@spring.bind "command.email" />

      email: <input type="text"

      name="${spring.status.expression}"

      value="${spring.status.value}">

  <font color="#FF0000">${spring.status.errorMessage}</font><br>

 
 

4、最后,你还需要做一件事才能使用FreeMarker

<@spring.bindEscaped>的FreeMarker模板的顶部增加以下一行:

   <#import "/spring.ftl" as spring />

 
 

这一行会在模板中导入Spring的FreeMarker宏。

 

 

 

 

Jeecms中相关的配置文件如下----------------->:

总体说明:

 

1、定义FreeMaker引入文件,index.ftl前缀为p,spring.ftl的前缀为s,这样在饮用ftl模版的宏定义时,可以简略使用。

 

<prop key="auto_import">/WEB-INF/ftl/pony/index.ftl as p,/WEB-INF/ftl/spring.ftl as s</prop>

 在html表单中的使用,例如:

 

<div class="body-box">
<@p.form id="jvForm" action="o_update.do" labelWidth="12">
<@p.td 
。。。。
</div>

 

2、在jeecms中,请求回话属性都不允许暴露给freemarker使用。。(不知道是否跟freemarker不支持集群有关系????这样是否可以支持集群

 

....

	<property name="exposeRequestAttributes" value="false"/>
	<property name="exposeSessionAttributes" value="false"/>
....

 

以下是涉及到的配置文件:

  • web.xml 中的配置文件
....
       <context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>
			/WEB-INF/config/application-context.xml
			/WEB-INF/config/cache-context.xml
			/WEB-INF/config/captcha-context.xml
			/WEB-INF/config/jeecore-context.xml
			/WEB-INF/config/jeecms-context.xml
		</param-value>
	</context-param>

....
  • jeecms-context.xml

在这个配置文件中,freeMarkerConfigurer作为 StaticPageSvcImpl的一个属性,注入到这个类中。

freeMarkerConfigurer的配置包括freemarker定义的标签(见freemarkerVariables),freemarkerSettings中定义了一些详细的属性。

详见前面的描述。

<bean id="staticPageSvc" class="com.jeecms.cms.staticpage.StaticPageSvcImpl">
		<property name="tplMessageSource" ref="tplMessageSource"/>
		<property name="freeMarkerConfigurer">
			<bean class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
				<property name="freemarkerVariables">
					<map>
						<entry key="uuid" value-ref="uuid"/>
						<entry key="process_time" value-ref="process_time"/>
						<entry key="text_cut" value-ref="text_cut"/>
						<entry key="html_cut" value-ref="html_cut"/>
						<entry key="cms_pagination" value-ref="cms_pagination"/>
						<entry key="cms_channel_list" value-ref="cms_channel_list"/>
						<entry key="cms_channel_page" value-ref="cms_channel_page"/>
						<entry key="cms_channel" value-ref="cms_channel"/>
						<entry key="cms_content" value-ref="cms_content"/>
						<entry key="cms_content_list" value-ref="cms_content_list"/>
						<entry key="cms_content_page" value-ref="cms_content_page"/>
						<entry key="cms_tag_list" value-ref="cms_tag_list"/>
						<entry key="cms_tag_page" value-ref="cms_tag_page"/>
						<entry key="cms_topic_list" value-ref="cms_topic_list"/>
						<entry key="cms_topic_page" value-ref="cms_topic_page"/>
						<entry key="cms_comment_list" value-ref="cms_comment_list"/>
						<entry key="cms_comment_page" value-ref="cms_comment_page"/>
						<entry key="cms_guestbook_ctg_list" value-ref="cms_guestbook_ctg_list"/>
						<entry key="cms_guestbook_list" value-ref="cms_guestbook_list"/>
						<entry key="cms_guestbook_page" value-ref="cms_guestbook_page"/>
						<entry key="cms_vote" value-ref="cms_vote"/>
						<entry key="cms_friendlink_ctg_list" value-ref="cms_friendlink_ctg_list"/>
						<entry key="cms_friendlink_list" value-ref="cms_friendlink_list"/>
						<entry key="cms_lucene_list" value-ref="cms_lucene_list"/>
						<entry key="cms_lucene_page" value-ref="cms_lucene_page"/>
						<entry key="cms_advertising" value-ref="cms_advertising"/>
					</map>
				</property>
				<property name="templateLoaderPath" value=""/>
				<property name="freemarkerSettings">
					<props>
						<prop key="tag_syntax">auto_detect</prop>
						<prop key="template_update_delay">5</prop>
						<prop key="defaultEncoding">UTF-8</prop>
						<prop key="url_escaping_charset">UTF-8</prop>
						<prop key="locale">zh_CN</prop>
						<prop key="boolean_format">true,false</prop>
						<prop key="datetime_format">yyyy-MM-dd HH:mm:ss</prop>
						<prop key="date_format">yyyy-MM-dd</prop>
						<prop key="time_format">HH:mm:ss</prop>
						<prop key="number_format">0.######</prop>
						<prop key="whitespace_stripping">true</prop>
						<prop key="auto_import">/WEB-INF/ftl/pony/index.ftl as p,/WEB-INF/ftl/spring.ftl as s</prop>
					</props>
				</property>
			</bean>
		</property>
	</bean>
 
  • jeecms-servlet-admin.xml

   view resolver 配置:

<bean id="freemarkerViewResolver" class="com.jeecms.common.web.springmvc.RichFreeMarkerViewResolver">
		<property name="prefix" value="/jeecms_sys/"/>
		<property name="suffix" value=".html"/>
		<property name="contentType" value="text/html; charset=UTF-8"/>
		<property name="exposeRequestAttributes" value="false"/>
		<property name="exposeSessionAttributes" value="false"/>
		<property name="exposeSpringMacroHelpers" value="true"/>
	</bean>
 

freemarkerConfig 配置:

	<bean id="freemarkerConfig" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
		<property name="templateLoaderPath" value="/WEB-INF"/>
		<property name="freemarkerVariables">
			<map>
				<!--在FCK编辑器中需要用到appBase,以确定connector路径。-->
				<entry key="appBase" value="/jeeadmin/jeecms"/>
				<!--后台管理权限控制-->
				<entry key="cms_perm" value-ref="cms_perm"/>
				<entry key="text_cut" value-ref="text_cut"/>
				<entry key="html_cut" value-ref="html_cut"/>
			</map>
		</property>
		<property name="freemarkerSettings">
			<props>
				<prop key="template_update_delay">0</prop>
				<prop key="defaultEncoding">UTF-8</prop>
				<prop key="url_escaping_charset">UTF-8</prop>
				<prop key="locale">zh_CN</prop>
				<prop key="boolean_format">true,false</prop>
				<prop key="datetime_format">yyyy-MM-dd HH:mm:ss</prop>
				<prop key="date_format">yyyy-MM-dd</prop>
				<prop key="time_format">HH:mm:ss</prop>
				<prop key="number_format">0.######</prop>
				<prop key="whitespace_stripping">true</prop>
				<prop key="auto_import">/ftl/pony/index.ftl as p,/ftl/spring.ftl as s</prop>
			</props>
		</property>
	</bean>
 
  • jeecms-servlet-front.xml ,

view resolver 配置:

 

	<bean id="freemarkerViewResolver" class="com.jeecms.common.web.springmvc.SimpleFreeMarkerViewResolver">
		<property name="contentType" value="text/html; charset=UTF-8"/>
		<property name="exposeRequestAttributes" value="false"/>
		<property name="exposeSessionAttributes" value="false"/>
		<property name="exposeSpringMacroHelpers" value="true"/>
	</bean>
 

freemarkerConfig 配置:参数配置与jeecms-servlet-admin.xml类似。

<bean id="freemarkerConfig" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
		<property name="freemarkerVariables">
			<map>
				<entry key="uuid" value-ref="uuid"/>
				<entry key="process_time" value-ref="process_time"/>
				<entry key="text_cut" value-ref="text_cut"/>
				<entry key="html_cut" value-ref="html_cut"/>
				<entry key="cms_pagination" value-ref="cms_pagination"/>
				<entry key="cms_channel_list" value-ref="cms_channel_list"/>
				<entry key="cms_channel_page" value-ref="cms_channel_page"/>
				<entry key="cms_channel" value-ref="cms_channel"/>
				<entry key="cms_content" value-ref="cms_content"/>
				<entry key="cms_content_list" value-ref="cms_content_list"/>
				<entry key="cms_content_page" value-ref="cms_content_page"/>
				<entry key="cms_tag_list" value-ref="cms_tag_list"/>
				<entry key="cms_tag_page" value-ref="cms_tag_page"/>
				<entry key="cms_topic_list" value-ref="cms_topic_list"/>
				<entry key="cms_topic_page" value-ref="cms_topic_page"/>
				<entry key="cms_comment_list" value-ref="cms_comment_list"/>
				<entry key="cms_comment_page" value-ref="cms_comment_page"/>
				<entry key="cms_guestbook_ctg_list" value-ref="cms_guestbook_ctg_list"/>
				<entry key="cms_guestbook_list" value-ref="cms_guestbook_list"/>
				<entry key="cms_guestbook_page" value-ref="cms_guestbook_page"/>
				<entry key="cms_vote" value-ref="cms_vote"/>
				<entry key="cms_lucene_list" value-ref="cms_lucene_list"/>
				<entry key="cms_lucene_page" value-ref="cms_lucene_page"/>
				<entry key="cms_friendlink_ctg_list" value-ref="cms_friendlink_ctg_list"/>
				<entry key="cms_friendlink_list" value-ref="cms_friendlink_list"/>
				<entry key="cms_advertising" value-ref="cms_advertising"/>
			</map>
		</property>
		<!--
			<property name="preTemplateLoaders">
				<list>
					<ref bean="tplMng"/>
				</list>
			</property>
			-->
		<property name="templateLoaderPath" value=""/>
		<property name="freemarkerSettings">
			<props>
				<prop key="tag_syntax">auto_detect</prop>
				<prop key="template_update_delay">5</prop>
				<prop key="defaultEncoding">UTF-8</prop>
				<prop key="url_escaping_charset">UTF-8</prop>
				<prop key="locale">zh_CN</prop>
				<prop key="boolean_format">true,false</prop>
				<prop key="datetime_format">yyyy-MM-dd HH:mm:ss</prop>
				<prop key="date_format">yyyy-MM-dd</prop>
				<prop key="time_format">HH:mm:ss</prop>
				<prop key="number_format">0.######</prop>
				<prop key="whitespace_stripping">true</prop>
				<!--空值处理<prop key="classic_compatible">true</prop>-->
				<prop key="auto_import">/WEB-INF/ftl/pony/index.ftl as p,/WEB-INF/ftl/spring.ftl as s</prop>
			</props>
		</property>
	</bean>
 

至此,JeeCms中的FreeMarker的配置已经分析完毕。

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