先参考文章：【Spring MVC】使用IDEA创建Spring MVC的Maven项目 ，创建 Spring MVC 项目。
1、在Maven中添加 FreeMarker jar 包依赖：
<!--++++++++++++++++++++++++++++++++++++++++++++++++++++-->
<!-- FreeMarker 模板引擎 -->
<!--++++++++++++++++++++++++++++++++++++++++++++++++++++-->
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>2.3.31</version>
</dependency>
2、在 applicationContext.xml 中加入内容：
<!--++++++++++++++++++++++++++++++++++++++++++++++++++++-->
<!-- FreeMarker的配置 -->
<!--++++++++++++++++++++++++++++++++++++++++++++++++++++-->
<bean id="freemarkerConfig"
class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
<property name="templateLoaderPath" value="/WEB-INF/view"/>
<!--上下文地址的获取-->
<property name="freemarkerVariables">
<map>
<entry key="base" value="#{servletContext.contextPath}"/>
</map>
</property>
<property name="defaultEncoding" value="UTF-8"/>
<property name="freemarkerSettings">
<props>
<prop key="template_update_delay">10</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>
3、在 dispatcher-servlet.xml 中加入内容：
<!--++++++++++++++++++++++++++++++++++++++++++++++++++++-->
<!-- FreeMarker的配置 -->
<!--++++++++++++++++++++++++++++++++++++++++++++++++++++-->
<bean id="viewResolver"
class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
<property name="cache" value="true"/>
<property name="prefix" value=""/>
<property name="suffix" value=".ftl"/>
<property name="contentType" value="text/html;charset=UTF-8"/>
<property name="requestContextAttribute" value="request"/>
<property name="exposeSpringMacroHelpers" value="true"/>
<property name="exposeRequestAttributes" value="true"/>
<property name="exposeSessionAttributes" value="true"/>
</bean>
4、新建模板文件：/WEB-INF/view/freemarker.ftl
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>${title}</title>
</head>
<body>
${content}
</body>
</html>
5、Controler示例，通过ModelAndView引用一个模板，使用的时候名字不带后缀
package com.jianbao.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
@RequestMapping("/home")
public class IndexController {
@GetMapping("/index")
public ModelAndView index() {
ModelAndView mv = new ModelAndView("freemarker");
mv.addObject("title", "Spring MVC And Freemarker");
mv.addObject("content", "Hello world，This is my first spring mvc !");
return mv;
}
}
6、浏览器访问： http://localhost:8080/home/index，输出
Hello world，This is my first spring mvc !
温馨提示：
可以把模板文件放到 \src\main\resources\templates 目录下（如：Spring Boot 项目的默认模板文件目录就是这个）
然后再调整一下FreeMarker的模板加载目录，即把
<property name="templateLoaderPath" value="/WEB-INF/view"/>
改为：
<property name="templateLoaderPath" value="classpath:/templates"/>
参考：
Spring Boot FreeMarker 模板路径的几种设置方式