FreeMarker 简单使用

导入依赖

  <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.23</version>
     </dependency>

spring配置文件 配置

 <bean id="freemarkerConfig"
          class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
        <!--指定模板文件所在目录-->
        <property name="templateLoaderPath" value="/WEB-INF/ftl/"/>
        <!--指定字符集-->
        <property name="defaultEncoding" value="UTF-8" />
    </bean>

    <!--加载属性文件，后期在java代码中会使用到属性文件中定义的key和value-->
    <context:property-placeholder location="classpath:freemarker.properties"/>

freemarker.properties

# 静态文件输出的目录
out_put_path=D:/IdeaProjects/itheima/health--parent/health-mobile/src/main/webapp/pages

ServiceImpl 使用

	//哪一功能需要生成静态文件调用这个方法即可  权限修饰符可以改变
    private void generateMobileStaticHtml() {
        List<Setmeal> setmealList = this.findAll();
        generateMobileSetmealListHtml(setmealList);
        generateMobileSetmealDetaiHtml(setmealList);

    }

    //生成套餐详情静态界面(多个)
    private void generateMobileSetmealDetaiHtml(List<Setmeal> setmealList) {
        for (Setmeal setmeal : setmealList) {
            HashMap<String, Object> dataMap = new HashMap<>();
            dataMap.put("setmeal", this.findAllByID(setmeal.getId()));
            //可以结合VUE的模板页面实现页面静态化,产出的页面占用大小会更加优化  **注意** 这里一定要传一个json数据
           // dataMap.put("setmeal", JSON.json(this.findAllByID(setmeal.getId())));

            this.generateHtml("mobile_setmeal_detail.ftl", "setmeal_detail_" + setmeal.getId() + ".html", dataMap);
        }
    }

    //生成套餐详情静态界面
    private void generateMobileSetmealListHtml(List<Setmeal> setmealList) {
        Map<String, Object> dataMap = new HashMap<>();
        dataMap.put("setmealList", setmealList);
        this.generateHtml("mobile_setmeal.ftl", "m_setmeal.html", dataMap);
    }
    //API操作
    private void generateHtml(String templateName, String htmlPageName, Map<String, Object> dataMap) {
        Configuration configuration = freeMarkerConfigurer.getConfiguration();
        BufferedWriter bufferedWriter = null;
        try {
            Template template = configuration.getTemplate(templateName);
            File file = new File(outPutPath + "/" + htmlPageName);
            bufferedWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file)));
            template.process(dataMap, bufferedWriter);
            //bufferedWriter.close();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (bufferedWriter != null) {
                try {
                    bufferedWriter.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }