新建工程 freemarker-demo
1. 导入依赖
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.8.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<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>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency><!-- apache 对 java io 的封装工具库 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-io</artifactId>
<version>1.3.2</version>
</dependency>
</dependencies>
2. 启动类
package com.freemarker;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class WebApp {
public static void main(String[] args) {
SpringApplication.run(WebApp.class, args);
}
}
3. 配置文件
server: port: 8001 spring: application: name: freemarker-demo freemarker: suffix: .ftl
4. 模板文件
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>01-basic</title>
</head>
<body>
<b>普通文本 String 展示：</b><br><br>
Hello ${name} <br>
<hr>
<b>对象Student中的数据展示：</b><br/>
姓名：${stu.name}<br/>
年龄：${stu.age}
<hr>
</body>
</html>
5. 实体类
package com.freemarker.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Student {
private String name;
private Integer age;
}
6. 控制器
package com.freemarker.controller;
import com.heima.freemarker.entity.Student;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping("/test")
public class TestController {
@GetMapping("/basic")
public String basic(Model model) {
// 1.纯文本形式的参数
model.addAttribute("name", "zhangsan");
// 2.实体类相关的参数
Student student = new Student("lisi", 18);
model.addAttribute("stu", student);
return "01-basic";
}
}
******
freemarker 基础语法:
--list
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>02-list</title>
</head>
<body>
<table>
<#list stus as stu>
<tr>
<td>${stu_index+1}</td>
<td>${stu.name}</td>
<td>${stu.age}</td>
</tr></#list>
</table>
</body>
</html>
添加控制器方法
@GetMapping("/list")
public String list(Model model){
List<Student> list = new ArrayList<>();
list.add(new Student("zhangsan",18));
list.add(new Student("lisi",20));
list.add(new Student("wangwu",19));
model.addAttribute("stus", list);
return "02-list";
}
--map
添加模板文件 03-map.ftl
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>03-map</title>
</head>
<body>
<ul>
<#list userMap?keys as key>
<li>key:${key}--value:${userMap["${key}"]}</li>
</#list>
</ul>
</body>
</html>
添加控制器方法
@GetMapping("/map")
public String map(Model model){
Map<String,Object> map = new HashMap<>();
map.put("zhangsan",18);
map.put("lisi",22);
model.addAttribute("userMap", map);
return "03-map";
}
--条件判断
添加模板 04-if.ftl
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>02-list</title>
</head>
<body>
<table>
<#list stus as stu>
<#if stu.name='小红'>
<tr style="color: red">
<td>${stu_index+1}</td>
<td>${stu.name}</td>
<td>${stu.age}</td>
</tr><#else >
<tr>
<td>${stu_index+1}</td>
<td>${stu.name}</td>
<td>${stu.age}</td>
</tr></#if>
</#list>
</table>
</body>
</html>
添加方法
@GetMapping("/if")
public String condition(Model model){
List<Student> list = new ArrayList<>();
list.add(new Student("小红",18));
list.add(new Student("小明",20));
model.addAttribute("stus", list);
return "04-if";
}
测试
最后
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