springboot_模板引擎
程序员文章站
2024-03-12 15:03:08
...
springboot_模板引擎
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
案例一(如何获取单个字符串):
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="${msg}"></div>
</body>
</html>
结果
案例二(如何遍历):
在案例一的原基础上添加代码实现
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<html lang="en">
<head>
<meta charset="UTF-8">
<title>thymeleaf模板知识点介绍</title>
</head>
<body>
<div th:text="${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>
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="${htmlStr}"></div>
解决办法:
<div th:utext="${htmlStr}"></div>
效果:
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):
需要用到的类
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>
${name}
</#if>
<h2>条件</h2>
<#if sex=='girl'>
女
<#elseif sex=='boy'>
男
<#else>
保密
</#if>
<h2>循环</h2>
<table border="1px" width="600px">
<thead>
<tr>
<td>ID</td>
<td>角色名</td>
<td>描述</td>
</tr>
</thead>
<tbody>
<#list roles as role>
<tr>
<td>${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>
${ctx1}和${ctx2}
</body>
</html>
选择性包含内容:
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:
上一篇: Java创建数组的几种方式总结