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JAVA Freemarker JAVA集成Freemarker生成静态html过程解析

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Springboot

1.引入Freemarker jar包

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>

2.配置application.properties

### freemarker
spring.freemarker.templateLoaderPath=classpath:/templates/
spring.freemarker.suffix=.ftl
spring.freemarker.charset=UTF-8
spring.freemarker.request-context-attribute=request
spring.freemarker.settings.number_format=0.##########

3.创建ftl文件

在resource文件下新增文件夹templates,在templates文件夹下存放ftl文件,例如:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8"/>
  <title>FreeMarker</title>
</head>
<body>
<h1>Simple project</h1>
<h1>${key}</h1>
</body>
</html>

4.新建controller调用方法

@SuppressWarnings("unchecked")
  @RequestMapping(value="/test",method=RequestMethod.GET)
  public String test(Model model,HttpServletRequest request) {
     model.addAttribute("key","test project");
    return "test";
  }

5.生成html静态文件

使用工具类:

/**
   * @param modeName 模板名称
   * @param targetFileName 生成后的HTML名称
   * @param params 传入模板的参数
   * @Author: zy
   * @Date: 2020-6-4 09:39:47
   * @Description:生成静态页面
   */
  public void createHtmlByMode(String modeName, String targetFileName, Map<String, Object> params) {
    Writer out = null;
    // 找到服务器缓存目录,可以自己指定目录
    String folder = PropertisUtil.getApplicationProperties("healthReport.logs.urls") + targetFileName;
    // 通过匹配路径格式拼接完整生成路径
    String outFile = folder;
    try {
      File file = new File(outFile);
      // 生成空HTML文件
      if (!file.exists()) {
        file.createNewFile();
      }

      // 创建模版对象
      Template template = cfg.getTemplate(modeName);

      // 设置输出流
      out = new OutputStreamWriter(new FileOutputStream(file), "UTF-8");// 设置编码 UTF-8

      // 模版数据插入参数,通过输出流插入到HTML中
      template.process(params, out);

    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      if (null != out) {
        try {
          out.flush();
          out.close();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    }
  }

修改controller中的方法:

@SuppressWarnings("unchecked")
  @RequestMapping(value="/test",method=RequestMethod.GET)
  public String test(Model model,HttpServletRequest request) {
     model.addAttribute("key","test project");
     //生成静态文件
     Map param=new HashMap();
     param.put("key", "我是被生成的静态文件");
     createHtmlByMode("test.ftl","test.html",param);
    return "test";
    
  }

实现效果(我这里默认保存到d:/testlogs):

Springmvc(和springboot大致相同,此处只留下配置)

1.引入Freemarker jar包

<dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>3.2.4.RELEASE</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.freemarker/freemarker -->
    <dependency>
      <groupId>org.freemarker</groupId>
      <artifactId>freemarker</artifactId>
      <version>2.3.25-incubating</version>
    </dependency>

2.springmvc配置

<!-- freemarker -->
  <bean id="freeMarkerConfigurer"
    class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
    <property name="templateLoaderPath" value="/freemarker/ftl/"></property>
    <property name="defaultEncoding" value="utf-8" />
    <property name="freemarkerSettings">
      <props>
        <prop key="template_update_delay">1</prop>
        <prop key="locale">zh_CN</prop>
        <prop key="datetime_format">yyyy-MM-dd</prop><!-- 时间格式化 -->
        <prop key="date_format">yyyy-MM-dd</prop>
        <prop key="number_format">#.##</prop>
      </props>
    </property>
  </bean>

  <bean id="freeMarkerViewResolver"
    class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
    <property name="cache" value="true" />
    <property name="prefix" value="" /><!-- 上面已经配了,这里就不用配啦 -->
    <property name="suffix" value=".ftl" />
    <property name="contentType" value="text/html;charset=UTF-8" />
    <property name="allowSessionOverride" value="true" />
    <property name="allowRequestOverride" value="true" />
    <property name="exposeSpringMacroHelpers" value="true" />
    <property name="exposeRequestAttributes" value="true" />
    <property name="exposeSessionAttributes" value="true" />
    <property name="requestContextAttribute" value="request" />
  </bean>

3.调用方式

/**返回模板信息*/
 @SuppressWarnings("unchecked")
 @RequestMapping(value="/test",method={RequestMethod.GET})
 public ModelAndView test(HttpServletRequest request) {
   ModelAndView mv = new ModelAndView();
   //设置参数
   mv.addObject("key", "测试freemarker");
   //配置模板
   mv.setViewName("test");
   return mv;
 }

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