依赖
<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 参数路径
server: port: 8001 spring: application: name: test-freemarker freemarker: cache: false settings: template_update_delay: 0 template-loader-path: classpath:/templates/
启动类
@SpringBootApplication
public class FreemarkerApplication {
public static void main(String[] args) {
SpringApplication.run(FreemarkerApplication.class, args);
}
@Bean
public RestTemplate restTemplate(){
return new RestTemplate(new OkHttp3ClientHttpRequestFactory());
}
}模板文件
<!DOCTYPE html>
<!-- resources/templates/test2.ftl -->
<html>
<head lang="en">
<meta charset="UTF-8"/>
<title></title>
</head>
<body>
<table>
<tr>
<td>序号</td>
<td>姓名</td>
<td>年龄</td>
<td>金钱</td>
<td>出生日期</td>
</tr>
<#if students??>
<#list students as stu>
<tr>
<td>${stu_index}</td>
<td <#if (stu.name == '刘备')></#if> >${stu.name}</td>
<td <#if (stu.age < 20)></#if>>${stu.age}</td>
<td>${stu.money}</td>
<td>${stu.birthday?date},${stu.birthday?time},${stu.birthday?string("yyyy年MM月dd日")}</td>
</tr>
</#list>
</#if>
</table>
姓名：${stuMap['stu1'].name}
年龄: ${stuMap.stu1.age}
<#list stuMap?keys as k>
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
<#assign text="{'bank':'中国农业银行', 'address':'北大街'}">
<#assign data=text?eval>
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
</body>
</html><!DOCTYPE html>
<!-- resources/templates/index_banner.ftl -->
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div class="banner-roll">
<#if model??>
<#list model as item>
<div class="item" ></div>
</#list>
</#if>
</div>
</div>
<script type="text/javascript">
//...
</script>
</body>
</html>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,Object> 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,Object> 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, Student> 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";
}
} 
