Spring Boot Freemarker QuickStart

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创建项目

创建一个普通 Maven Java项目,项目结构如下图

引入依赖

pom.xml
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<?xml version="1.0" encoding="UTF-8"?>

<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/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <!-- spring boot 项目必须要设置 parent标签 -->
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.6.6</version>
    <relativePath/> <!-- lookup parent from repository -->
  </parent>

  <groupId>org.example</groupId>
  <artifactId>shsxt-springboot-freemarker-quickstart</artifactId>
  <version>1.0-SNAPSHOT</version>
  <!-- 注意这里改成 jar -->
  <packaging>jar</packaging>

  <name>shsxt-springboot-freemarker-quickstart Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>

  <dependencies>
    <!-- web 环境 -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <!-- freemarker -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-freemarker</artifactId>
    </dependency>
  </dependencies>

  <build>
    <finalName>shsxt-springboot-freemarker-quickstart</finalName>
    <plugins>
      <!-- spring boot 打包插件 -->
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>
</project>

创建控制器

IndexController
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package com.example.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;

@Controller
public class IndexController {
    @GetMapping("/")
    public String index(Model model){
        model.addAttribute("msg", "Hello freemarker");
        return "index";
    }
}

创建视图

index.ftlh
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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Hello world</title>
    <#--引入方法一 -->
    <#-- <link rel="stylesheet" href="css/main.css">-->

    <#--引入方法二 -->
    <#assign rootPath=springMacroRequestContext.contextPath />
    <link rel="stylesheet" href="${rootPath}/css/main.css">

</head>
<body>
    <h2>${msg}</h2>

    <div>
        <img src="${rootPath}/images/hello.jpeg" alt="hello world">
    </div>

    <script src="${rootPath}/js/main.js"></script>
</body>
</html>

添加静态资源

Spring Boot 静态资源配置属性类为 ResourceProperties(已废弃)

Sprin Boot 默认静态资源路径如下

  • META-INF/resources/
  • classpath:/resources/
  • classpath:/static/
  • classpath:/public/

静态资源路径可以通过配置修改

application.yml
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spring:
  web:
    resources:
      # static-locations: classpath:/pubilc/, classpath:/static/,classpath:/os/
      static-locations:
        - classpath:/pubilc/
        - classpath:/static/
        - classpath:/os/

创建启动器

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package com.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Starter {
    public static void main(String[] args) {
        SpringApplication.run(Starter.class);
    }
}