在项目中加入freemarker

Myth丶恋晨 2022-06-13 04:19 222阅读 0赞

在spring的配置文件中加入：

<bean id="freemarkerConfig" class="com.utils.freemarker.ShiroTagFreeMarkerConfigurer">  
            <property name="templateLoaderPath" value="/WEB-INF/ftl/" /> 
            <property name="freemarkerVariables">    
                <map>    
                    <entry key="xml_escape" value-ref="fmXmlEscape" />    
                </map>    
            </property> 
            <property name="defaultEncoding">    
                <value>utf-8</value>    
            </property>    
            <property name="freemarkerSettings">  
                <props>  
                    <prop key="template_update_delay">0</prop>  
                    <prop key="default_encoding">UTF-8</prop>  
                    <prop key="number_format">0.##########</prop>  
                    <prop key="datetime_format">yyyy-MM-dd HH:mm:ss</prop>  
                    <prop key="classic_compatible">true</prop>  
                    <prop key="template_exception_handler">ignore</prop>  
                    
                    <prop key="auto_import">
                        /common/common.ftl as _com
                    </prop>
                    <prop key="template_update_delay">5</prop>    
                </props> 
            </property> 
        </bean>

配置视图解析器：

<bean id="fmXmlEscape" class="freemarker.template.utility.XmlEscape"/>    
        <bean id="viewResolver" class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">  
            <property name="suffix">  
                <value>.ftl</value>  
            </property>  
            <property name="contentType" value="text/html;charset=UTF-8"></property>
            <property name="viewClass" value="com.utils.model.MyFreeMarkerView" />
        </bean>

自定义类ShiroTagFreeMarkerConfigurer：

package com.utils.freemarker;
    
    import java.io.IOException;
    
    import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;
    
    import com.jagregory.shiro.freemarker.ShiroTags;
    
    import freemarker.template.Configuration;
    import freemarker.template.TemplateException;
    import freemarker.template.TemplateModelException;
    /** * 自定义一个ShiroTagFreeMarkerConfigurer继承Spring本身提供的FreeMarkerConfigurer, * 目的是在FreeMarker的Configuration中添加shiro的配置 * @author mac * */
    public class ShiroTagFreeMarkerConfigurer extends FreeMarkerConfigurer { 
        @Override  
        public void afterPropertiesSet() throws IOException, TemplateException {  
            super.afterPropertiesSet();
            Configuration cfg = this.getConfiguration();
            putInitShared(cfg);
        }  
    
        public static void put(Configuration cfg,String k,Object v) throws TemplateModelException{
    
            cfg.setSharedVariable(k,v); 
            cfg.setNumberFormat("#");//防止页面输出数字,变成2,000
        }
        public static void putInitShared(Configuration cfg) throws TemplateModelException{
            //shiro tag 
            put(cfg,"shiro", new ShiroTags()); 
        }
    }

自定义类MyFreeMarkerView：  
这样在.ftl文件中， 就可以引用basePath和\{\_v\}获取固定值

package com.utils.model;
    
    import java.util.Calendar;
    import java.util.Map;
    
    import javax.servlet.http.HttpServletRequest;
    
    import org.springframework.web.servlet.view.freemarker.FreeMarkerView;
    
    /** * 添加freemarker绝对路径. * @author mac * */
    public class MyFreeMarkerView extends FreeMarkerView{ 
    
        private static final String CONTEXT_PATH = "basePath"; 
        private static final String VERSION = "_v"; 
        /** * 重写该方法生成 */
        @Override
        protected void exposeHelpers(Map<String, Object> model, HttpServletRequest request) throws Exception {
            //服务器绝对路径
            model.put(CONTEXT_PATH, request.getContextPath());
            model.put(VERSION, Calendar.getInstance().getTime().toString());
            super.exposeHelpers(model, request);
        }
    
        public static void main(String[] args) {
            String time = Calendar.getInstance().getTime().toString();
            System.out.println(time);
        }
    }