How to integrate freemarker in springboot

Dependency

<parent>
  <groupid>org.springframework.boot</groupid>
  <artifactid>spring-boot-starter-parent</artifactid>
  <version>2.1.6.RELEASE</version>
</parent>

<dependencies>
  <dependency>
    <groupid>org.springframework.boot</groupid>
    <artifactid>spring-boot-starter-freemarker</artifactid>
  </dependency>
  <dependency>
    <groupid>org.projectlombok</groupid>
    <artifactid>lombok</artifactid>
  </dependency>
  <dependency>
    <groupid>com.squareup.okhttp3</groupid>
    <artifactid>okhttp</artifactid>
    <version>3.9.1</version>
  </dependency>
  <dependency>
    <groupid>commons-io</groupid>
    <artifactid>commons-io</artifactid>
    <version>2.6</version>
  </dependency>

  <dependency>
    <groupid>org.springframework.boot</groupid>
    <artifactid>spring-boot-starter-web</artifactid>
  </dependency>
  <dependency>
    <groupid>org.springframework.boot</groupid>
    <artifactid>spring-boot-starter-test</artifactid>
  </dependency>
</dependencies>

application.yml

application parameter path

server:
 port: 8001
spring:
 application:
  name: test-freemarker
 freemarker:
  cache: false
  settings:
   template_update_delay: 0
  template-loader-path: classpath:/templates/

Startup class

@SpringBootApplication
public class FreemarkerApplication {
  public static void main(String[] args) {
    SpringApplication.run(FreemarkerApplication.class, args);
  }
  @Bean
  public RestTemplate restTemplate(){
    return new RestTemplate(new OkHttp3ClientHttpRequestFactory());
  }
}

Template file

nbsp;html>
<!-- resources/templates/test2.ftl -->


  <meta>
  <title></title>


  

                                                                                                                                        #list>     #if>   

序号	姓名	年龄	金钱	出生日期
${stu_index}	#if> >${stu.name}	#if>>${stu.age}	${stu.money}	${stu.birthday?date},${stu.birthday?time},${stu.birthday?string("yyyy年MM月dd日")}

姓名：${stuMap['stu1'].name} 年龄: ${stuMap.stu1.age}   姓名: ${stuMap[k].name}   年龄: ${stuMap[k].age} #list> ${stuMap???c}//判断是否存在，和使用 ?c 输出字符串 ${students???c} ${(mozq.bank.address)!'中国建设银行'}//默认值方式处理空值 ${students?size}//集合大小 开户行: ${data.bank} 地址: ${data.address} ${123456123?c}//不显示逗号分隔 ${123456123}//默认显示逗号分隔

nbsp;html>
<!-- resources/templates/index_banner.ftl -->

  
    <meta>
    <title>Title</title>
  
  
    <div>
      
        
          <div></div>
          #list>
        #if>
    </div>
    
  <script>
    //...
  </script>
  

Controller

package com.mozq.springboot.freemarker.controller;

import com.mozq.springboot.freemarker.model.Student;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.client.RestTemplate;

import java.util.*;

@Controller //注意不要使用 @RestController
@RequestMapping("/freemarker")
public class FreeMarkerController {

  @Autowired
  private RestTemplate restTemplate;

  @RequestMapping("/banner")
  public String banner(Map<string> map){
    String dataUrl = "http://localhost:31001/cms/config/getmodel/5a791725dd573c3574ee333f";
    ResponseEntity<map> entity = restTemplate.getForEntity(dataUrl, Map.class);
    Map body = entity.getBody();
    map.putAll((Map extends String, ?>) body);
    //    restTemplate.getForEntity("")
    return "index_banner";
  }

  @RequestMapping("/test2")
  public String test2(Map<string> map){
    Student stu1 = new Student();
    stu1.setName("刘备");
    stu1.setAge(18);
    stu1.setBirthday(new Date());
    stu1.setMoney(22225.8F);

    Student stu2 = new Student();
    stu2.setName("孙权");
    stu2.setAge(20);
    stu2.setBirthday(new Date());
    stu2.setMoney(24525.8F);
    stu2.setBestFriend(stu1);

    List<student> students = new ArrayList();
    students.add(stu1);
    students.add(stu2);
    //模板使用的数据
    map.put("students", students);

    HashMap<string> stuMap = new HashMap();
    stuMap.put("stu1", stu1);
    stuMap.put("stu2", stu2);
    map.put("stuMap", stuMap);
    //返回模板的位置，基于 resources/templates
    return "test2";
  }
}</string></student></string></map></string>

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