JAVA集成Freemarker生成静态html过程解析
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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