springboot+freemarker 开发

springboot默认不支持jsp,所以我们使用freemarker模块来实现view(视图层），

根据java开发的原则。从底层开始所以

第一步。设计entity

package com.gxuwz.freemarker.entity;

public class User {

    private String userId;
    private String userName;
    private String sex;

    public User(){

    }

    public User(String userId, String userName, String sex){
        this.userId = userId;
        this.userName = userName;
        this.sex = sex;
    }

    public String getUserId() {
        return userId;
    }

    public void setUserId(String userId) {
        this.userId = userId;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }
}

第二部。编写controller类

package com.gxuwz.freemarker.controller;

import com.gxuwz.freemarker.entity.User;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

@Controller
public class StudentController {

    @RequestMapping("/freemarker")
    public String freemarker(Map<String, Object> map){
        User user_one = new User("001","周小狄","男");
        User user_two = new User("002","周日月","男");

        map.put("name", "Joe");
        map.put("sex", 1);    //sex:性别，1：男；0：女；

        // 模拟数据
        List<User> friends = new ArrayList<User>();
        friends.add(user_one);
        friends.add(user_two);
        map.put("friends", friends);
        return "freemarker";
    }
}

第三步。视图层这里后缀为.html与后缀为.ftl效果一样。文件路径： templates/freemarker.html

<!DOCTYPE html>
<html xmlns="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 ${name} to freemarker!
    </p>

    <p>性别：
        <#if sex==0>
        女
        <#elseif sex==1>
        男
        <#else>
        保密
    </#if>
    </p>

    <h4>我的好友：</h4>
    <#list friends as item>
    姓名：${item.name} , 年龄${item.age}
    <br>
</#list>
</center>
</body>
</html>

第四步。设置全局配置application.perporties

server.port=8080
spring.freemarker.allow-request-override=false
spring.freemarker.cache=true
spring.freemarker.check-template-location=true
spring.freemarker.charset=UTF-8
spring.freemarker.content-type=text/html
spring.freemarker.expose-request-attributes=false
spring.freemarker.expose-session-attributes=false
spring.freemarker.suffix=.html
spring.freemarker.templateEncoding=UTF-8
spring.freemarker.templateLoaderPath=classpath:/templates/
spring.freemarker.expose-spring-macro-helpers=false

第五步。

使用freemarker模板要添加依赖（jar)

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>