一：在pom.xml中引入freemarker

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

关于freemarker的相关配置

 
########################################################
###FREEMARKER (FreeMarkerAutoConfiguration)
########################################################
spring.freemarker.allow-request-override=false
#缓存配置开发时关闭缓存
spring.freemarker.cache=true
spring.freemarker.check-template-location=true
spring.freemarker.charset=UTF-8
spring.freemarker.content-type=text/html
spring.freemarker.expose-request-attributes=false
spring.freemarker.expose-session-attributes=false
spring.freemarker.expose-spring-macro-helpers=false
#spring.freemarker.prefix=
#spring.freemarker.request-context-attribute=
#spring.freemarker.settings.*=
#spring.freemarker.suffix=.ftl
#spring.freemarker.template-loader-path=classpath:/templates/ #comma-separated list
#spring.freemarker.view-names= # whitelist of view names that can be resolved

代码：

controller：

package com.mt.controller;

import java.util.Date;
import java.util.Map;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/thymeleaf")
public class ThymeleafController {
    @RequestMapping("/hello")
    public String hello(Map<String, Object> map) {
        map.put("date", new Date());
        return "thymeleafDemo";
    }

    @RequestMapping("/demo")
    public String demo(Map<String, Object> map) {
        map.put("demo", "freemarker  demo ");
        return "freemarkerDemo";
    }

    @RequestMapping("/rr")
    public String rr(Map<String, Object> map) {
        map.put("demo", "freemarker  demo ");
        return "rr";
    }
}
View Code

ftl：

<!DOCTYPE html>
    <head>
        <title>Hello World!</title>
    </head>
    <body>
        <h1>Hello.v.2</h1>
        <p>${demo}</p>
    </body>
</html>