springboot 中自带的页面渲染工具为thymeleaf ，freemarker这种模板引擎用的也比较多。
一、在spring中springMVC代表着view层组件
二、为什么使用freemarker：简单容易学、逻辑分明
三、freemarker优点：不依赖servlet、网络或者web环境
1、 新建maven项目，对应的pom.xml文件如下
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>spring-cloud</groupId>
<artifactId>sc-freemarker</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>sc-freemarker</name>
<url>http://maven.apache.org</url>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
</parent>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Finchley.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
</dependencies>
</project>2、 新建配置文件application.yml
server:
port: 8081
spring:
application:
name: sc-freemarker
freemarker:
allow-request-override: false
cache: true
check-template-location: true
charset:UTF-8
content-type: text/html
expose-request-attributes: false
expose-session-attributes: false
suffix: .ftl
templateEncoding: UTF-8
templateLoaderPath: classpath:/templates/
expose-spring-macro-helpers: false备注：freemarker有哪些配置项可以参考类
org.springframework.boot.autoconfigure.freemarker.FreeMarkerProperties
3、 新建一个controller
package sc.freemarker.controller;
import java.util.ArrayList;
import java.util.List;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import sc.freemarker.model.User;
@Controller
public class FreemarkerController {
@RequestMapping("/getUser")
public StringgetUser(Integer id, Model model){
User u = new User();
u.setId(1);
u.setAge(13);
u.setSex(1);
u.setUserName("黄金");
User l = new User();
l.setId(1);
l.setAge(23);
l.setSex(0);
l.setUserName("白银");
List<User> friends = newArrayList<User>();
friends.add(l);
u.setFriends(friends);
model.addAttribute("user",u);
return"getUser";
}
}备注：注意最外层的控制层注解只能用@Controller
4、 新建模板文件getUser.ftl
<!DOCTYPE html>
<htmlxmlns="http://www.w3.org/1999/xhtml"
xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<title>Hello World!</title>
</head>
<body>
<center>
<p>welcome${user.userName} to freemarker!</p>
<p>
年龄： ${user.age}</br>
性别：
<#ifuser.sex==0> 女 <#elseifuser.sex==1> 男 <#else> 保密
</#if>
</p>
<h4>我的好友：</h4>
<#listuser.friends as f> 姓名：${f.userName} , 年龄${f.age} <br>
</#list>
</center>
</body>
</html>
5、 其他项目文件如下图
6、 运行FreemarkerApplication.java类，启动项目；并检查启动信息，确认freemarker配置是否生效
7、 访问页面http://127.0.0.1:8081/getUser
