In the first section, we demonstrate that the data is returned through the interface, and the data is not rendered and displayed on the page. Here we demonstrate a project case where the data returned from the background is rendered to the front page

template engine

SpringBoot renders page results through a template engine. The template engines officially provided with preset configurations mainly include

• Thymeleaf
• FreeMarker
• Velocity
• Groovy
• Mustache

Here we demonstrate the use of Thymeleaf and FreeMarker template engines.

Thymeleaf

Thymeleaf is a modern server-side Java template engine for Web and stand-alone environments.

Thymeleaf's main goal is to bring elegant natural templates to your development workflow - HTML can be displayed correctly in the browser or work as a static prototype, so as to strengthen the cooperation of the development team.

With the modules of the Spring Framework, extensive integration with your favorite tools, and the ability to plug in your own functions, Thymeleaf is ideal for modern HTML5 JVM Web development - although it has more functions.

Create a new module

Choose the build we need

• Spring Boot DevTools in Developer Tools
• Spring Web in Web
• Thymeleaf in Template Engines

It can also be directly in POM Introducing thymeleaf dependency into XML

    org.springframework.boot
    spring-boot-starter-thymeleaf

Create com rumenz. lession4. Controller package

Create template page

src/main/resources/templates/index.html

    
    thymeleaf - Entry station

Create controller

com.rumenz.lession4.controller.ThymeleafRumenController

package com.rumenz.lession4.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

/**
 * @className: ThymeleafRumenController
 * @description: TODO Class description
 * @author: Entry station rumenz com
 * @date: 2021/11/1
 **/
@Controller
@RequestMapping("/")
public class ThymeleafRumenController {

    @RequestMapping(value = "/index",method= RequestMethod.GET)
    public String index(ModelMap m){
        //Data can also be queried from the database and returned
        m.addAttribute("name", "Entry station");
        m.addAttribute("url", "https://rumenz.com");
        //The return is a page number: Src / main / resources / templates / thymeleaf html
        return "thymeleaf";
    }
}

Start project

Browser authentication

Browser access http://127.0.0.1:8080/index

FreeMarker

FreeMarker is a template engine, which is a general tool based on templates and data to be changed and used to generate output text (HTML web pages, e-mail, configuration files, source code, etc.).

Introduce dependency

    org.springframework.boot
    spring-boot-starter-freemarker

Create template

src/main/resources/templates/freemarker.html

    
    freemarker - Entry station


FreeMarker case
 name:${name}
website:${url}

configuration file

src/main/resources/application.properties to specify the suffix of the template file.

spring.freemarker.suffix=.html

Write controller

com.rumenz.lession4.controller.FreeMarkerRumenController

package com.rumenz.lession4.controller;

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

/**
 * @className: FreeMarkerRumenController
 * @description: TODO Class description
 * @author: Entry station rumenz com
 * @date: 2021/11/1
 **/

@Controller
@RequestMapping("/")
public class FreeMarkerRumenController {

    @RequestMapping("/index2")
    public String index2(ModelMap m){
        //Data can also be queried from the database and returned
        m.addAttribute("name", "Entry station");
        m.addAttribute("url", "https://rumenz.com");
        //The return is a page number: Src / main / resources / templates / freemaker html
        return "freemarker";

    }
}

Start project

Browser authentication

Browser access http://127.0.0.1:8080/index2

Source code address of this summary:

• GitHub:https://github.com/mifunc/springboot/tree/main/lession4
• Gitee:https://gitee.com/rumenz/springboot/tree/master/lession4
• https://rumenz.com/rumenbiji/springboot-tpl.html

introduce

• My blog https://rumenz.com/
• My toolbox https://tooltt.com/
• WeChat official account: [entry station]

• Follow the [entry station] and reply to [1001] to get the quick reference manual of common linux commands
• Follow the [entry station] reply [1003] to get the LeetCode problem solution [implemented in java language]
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