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springboot_模板引擎

程序员文章站 2024-03-12 15:03:08
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一、thymeleaf模板

关于Thymeleaf的优点,我只说一条:它就是html页面。下面直接上代码
相关pom依赖

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

Spring Boot官方文档建议在开发时将缓存关闭,那就在application.properties文件中加入下面这行

spring.thymeleaf.cache=false

springboot_模板引擎

案例一(如何获取单个字符串):

springboot_模板引擎
User

package com.yuan.springboot01.entity;

import lombok.Data;
import lombok.ToString;

/**
 * @author 梦园
 * @site www.mengyuan.com
 * @company xxx
 * @create 2020-11-29-8:31
 */
@Data
public class User {
    private Integer uid;
    private String uname;
    private String pwd;

    public User(Integer uid, String uname, String pwd) {
        this.uid = uid;
        this.uname = uname;
        this.pwd = pwd;
    }
}

UserController

package com.yuan.springboot01.controller;

import com.yuan.springboot01.entity.User;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import java.util.ArrayList;
import java.util.List;

/**
 * @author 梦园
 * @site www.mengyuan.com
 * @company xxx
 * @create 2020-11-29-8:32
 */
@Controller
@RequestMapping("/thymeleaf")
public class UserController {
    @RequestMapping("/list")
    public String hello(HttpServletRequest request){
        /**
         * 1.获取单个值
         * 2.能够在html页面进行遍历展示
         * 3.如何在html页面转义html代码块
         */
        request.setAttribute("msg","传输单个字符串!!");
        List<User> userList=new ArrayList<>();
        userList.add(new User(1,"zs","123"));
        userList.add(new User(2,"ls","234"));
        userList.add(new User(3,"ww","456"));
        request.setAttribute("userList",userList);
        request.setAttribute("htmlStr","<span style='color:red'>转义html代码块</span>");
        return "list";
    }
}

list.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>thymeleaf模板知识点介绍</title>
</head>
<body>
<div th:text="${msg}"></div>
</body>
</html>

结果
springboot_模板引擎

案例二(如何遍历):

在案例一的原基础上添加代码实现

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>thymeleaf模板知识点介绍</title>
</head>
<body>
<div th:text="${msg}"></div>
<table width="60%" border="1">
    <tr>
        <td>id</td>
        <td>用户名</td>
        <td>密码</td>
    </tr>
    <tr th:each="u:${userList}">
        <td th:text="${u.uid}"></td>
        <td th:text="${u.uname}"></td>
        <td th:text="${u.pwd}"></td>
    </tr>
</table>
</body>
</html>

springboot_模板引擎

案例三(转义html代码块)

这样的方法是直接输出一串代码的(错误示范):

<div th:text="${htmlStr}"></div>

springboot_模板引擎
解决办法:

<div th:utext="${htmlStr}"></div>

效果:
springboot_模板引擎

二、Freemarker模板

导入pom依赖

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-freemarker</artifactId>
   </dependency>
<!--可以不加,但是做项目的时候可能会用-->
 <resources>
            <!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <!--freemarker模板也读取需要注释标红地方-->
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <!--<include>*.properties</include>-->
                    <!--<include>*.xml</include>-->
                    <!--<include>*.yml</include>-->
                </includes>
            </resource>
        </resources>

application.yml文件的默认配置:

这串加过就不用加了!!!

spring:
  thymeleaf:
    cache: false

以下代码:

	freemarker:
    # 设置模板后缀名
    suffix: .ftl
    # 设置文档类型
    content-type: text/html
    # 设置页面编码格式
    charset: UTF-8
    # 设置页面缓存
    cache: false
    # 设置ftl文件路径,默认是/templates,为演示效果添加freemarker
    template-loader-path: classpath:/templates/freemarker
  mvc:
    static-path-pattern: /static/**

设置模板后缀名(看图):
springboot_模板引擎
需要用到的类
springboot_模板引擎
Role

package com.yuan.springboot01.entity;

import lombok.Data;

/**
 * @author 梦园
 * @site www.mengyuan.com
 * @company xxx
 * @create 2020-11-29-11:13
 */
@Data
public class Role {
    private Integer rid;
    private String rolename;
    private String desc;

    public Role(Integer rid) {
        this.rid = rid;
    }

    public Role(Integer rid, String rolename, String desc) {
        this.rid = rid;
        this.rolename = rolename;
        this.desc = desc;
    }
}

RoleController

package com.yuan.springboot01.controller;

import com.yuan.springboot01.entity.Role;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import java.util.ArrayList;
import java.util.List;

/**
 * @author 梦园
 * @site www.mengyuan.com
 * @company xxx
 * @create 2020-11-29-11:10
 */
@Controller
@RequestMapping("/freemarker")
public class RoleController {

    @RequestMapping("/role/list")
    public ModelAndView roleList() {
        ModelAndView mav = new ModelAndView();
        mav.setViewName("/list");

        mav.addObject("name", null);
        mav.addObject("sex", "gay");
        List list = new ArrayList();
        list.add(new Role(1, "老师", "教书育人"));
        list.add(new Role(2, "学生", "知识改变命运"));
        mav.addObject("roles", list);

        return mav;
    }
}

foot.ftl

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title>$Title$</title>
</head>
<body>
版权信息
</body>
</html>

list.ftl

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title>$Title$</title>
</head>
<body>
<h2>取值</h2>
<h3>提供默认值</h3>
welcome 【${name!'未知'}】 to freemarker!

<h3>exists用在逻辑判断</h3>
<#if name?exists>
    ${name}
</#if>

<h2>条件</h2>
<#if sex=='girl'><#elseif sex=='boy'><#else>
		保密
</#if>

<h2>循环</h2>
<table border="1px" width="600px">
    <thead>
    <tr>
        <td>ID</td>
        <td>角色名</td>
        <td>描述</td>
    </tr>
    </thead>
    <tbody>
    <#list roles as role>
    <tr>
        <td>${role.rid}</td>
        <td>${role.roleName}</td>
        <td>${role.desc}</td>
    </tr>
    </#list>
    </tbody>
</table>

<h2>include</h2>
<#include 'foot.ftl'>

<h2>局部变量(assign)/全局变量(global)</h2>
 <#assign ctx1>
     ${springMacroRequestContext.contextPath}
 </#assign>

<#global ctx2>
    ${springMacroRequestContext.contextPath}
</#global>

${ctx1}${ctx2}
</body>
</html>

选择性包含内容:
springboot_模板引擎
common.html

<div th:fragment="h1">
    第一部分内容
</div>
<div th:fragment="h2">
    第一部分内容
</div>
<div th:fragment="h3">
    第一部分内容
</div>

list.html中使用的命令是:

<div th:replace="common :: h2"></div>

可以一个页面大卸八块放到其他页面去。
效果:
springboot_模板引擎

相关标签: 笔记 spring boot