参考文档: FreeMarker标签与使用 连接http://blog.csdn.net/nengyu/article/details/6829244
freemarker学习笔记--指令参考: http://www.cnblogs.com/pengfeisun/articles/1623182.html
Freemarker 高级进阶
jsp的第一次运行,就要运行servlet,如果开发时频繁的修改jsp,会导致开发速度比较慢;(每改一次,要重新编译一次);
编译过后,模板的速度也要比jsp快.
具体的freemark页面上的使用:见http://blog.csdn.net/nengyu/article/details/6829244
最近做的项目中要在spring mvc中实现freemark 加载html模板,关键实现如下:
引入freemark.jar包
web.xml中的配置
<!-- freemarker 配置 -->
<bean id="freeMarkerConfigurer"
class="com.test.common.freemarker.CustomFreeMarkerConfigurer"> <!--freemark的配置文件类-->
<property name="templateLoaderPaths">
<list>
<value>/WEB-INF/template/</value> <!--html文件的存放位置-->
</list>
</property>
<property name="freemarkerSettings">
<props>
<prop key="template_update_delay">5</prop>
<prop key="default_encoding">UTF-8</prop>
<prop key="locale">zh_CN</prop>
<prop key="url_escaping_charset">UTF-8</prop>
<prop key="date_format">yyyy-MM-dd</prop>
<prop key="time_format">HH:mm:ss</prop>
<prop key="datetime_format">yyyy-MM-dd HH:mm:ss</prop>
<prop key="number_format">0.######</prop>
<prop key="boolean_format">true,false</prop>
<prop key="classic_compatible">true</prop>
<prop key="whitespace_stripping">true</prop>
</props>
</property>
</bean>
<!-- freemark 页面解析器 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.freemarker.FreeMarkerView" />
<property name="contentType" value="text/html; charset=utf-8" />
<property name="exposeSpringMacroHelpers" value="true"/>
<property name="cache" value="true" />
<property name="suffix" value=".html" />
<property name="order" value="1" />
</bean>
配置文件类: com.test.common.freemarker.CustomFreeMarkerConfigurer
public class CustomFreeMarkerConfigurer extends FreeMarkerConfigurer {
@Override
protected TemplateLoader getAggregateTemplateLoader(
List<TemplateLoader> templateLoaders) {
<!-- HtmlTemplateLoader 这个类用来自定义html模板 -->
return new HtmlTemplateLoader(super.getAggregateTemplateLoader(templateLoaders));
}
}
自定义html模板类:HtmlTemplateLoader,加escape html指令, escape指令在解析模版时起作用，而不是运行时起作用
public class HtmlTemplateLoader implements TemplateLoader {
private static final String HTML_ESCAPE_PREFIX= "<#escape x as x?html>";
private static final String HTML_ESCAPE_SUFFIX = "</#escape>";
private final TemplateLoader delegate;
public HtmlTemplateLoader(TemplateLoader delegate) {
this.delegate = delegate;
}
/* (non-Javadoc)
* @see freemarker.cache.TemplateLoader#closeTemplateSource(java.lang.Object)
*/
@Override
public void closeTemplateSource(Object templateSource) throws IOException {
delegate.closeTemplateSource(templateSource);
}
/* (non-Javadoc)
* @see freemarker.cache.TemplateLoader#findTemplateSource(java.lang.String)
*/
@Override
public Object findTemplateSource(String name) throws IOException {
return delegate.findTemplateSource(name);
}
/* (non-Javadoc)
* @see freemarker.cache.TemplateLoader#getLastModified(java.lang.Object)
*/
@Override
public long getLastModified(Object templateSource) {
return delegate.getLastModified(templateSource);
}
/* (non-Javadoc)
* @see freemarker.cache.TemplateLoader#getReader(java.lang.Object, java.lang.String)
* 在读取template文件之后, 在前后套上<#escape>标签
*/
@Override
public Reader getReader(Object templateSource, String encoding) throws IOException {
Reader reader = delegate.getReader(templateSource, encoding);
String templateText = IOUtils.toString(reader);
return new StringReader(HTML_ESCAPE_PREFIX+templateText + HTML_ESCAPE_SUFFIX);
}
}
escape指令body区的ftl的interpolations都会被自动加上escape表达式。但是不会影响字符串内的interpolations。而且也只会影响到body内出现的interpolations，比如不会影响到include的ftl的interpolations。
<#escape x as x?html>
First name: ${firstName}
Last name: ${lastName}
Maiden name: ${maidenName}
</#escape>
等同于：
First name: ${firstName?html}
Last name: ${lastName?html}
Maiden name: ${maidenName?html}
Last name: ${lastName?html}
Maiden name: ${maidenName?html}
具体的freemark指令见: freemarker学习笔记--指令参考: http://www.cnblogs.com/pengfeisun/articles/1623182.html