springboot模板引擎
测试是否springboot集成是否成功
相当与集成mybatis
ThymeleafController
package com.wxm.springboot.controller.springboot2;
import com.wxm.springboot.entity.springboot2.User;
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 wxm
* @site www.wxm.com
* @company xxx公司
* @create 2019-12-28 15:57
*/
@Controller
@RequestMapping("/thymeleaf")
public class ThymeleafController {
@RequestMapping("/list")
public String list() {
System.out.println(" list........");
return "list";
}
}
http://localhost/thymeleaf/list
thymeleaf模板
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
这里讲解的时候的时候是关闭缓存的（不关闭缓存有可能存在代码没有显示效果的问题）
将配置文件的后缀名改成.yml文件
spring.thymeleaf.cache=false
直接使用el表达式：${title}，这里如果是支持的时候是会显示出人员表这几个字
显然不支持，因为这里使用的是html,而不是jsp,${xxx}是jstl表达式，必须基于jsp，
thymeleaf中${}语法
<h3 th:text="${title}"></h3>
thymeleaf中list遍历
<tr th:each="u : ${userList}">
<td th:text="${u.uid}">
</td>
<td th:text="${u.uname}">
</td>
<td th:text="${u.upwd}">
</td>
</tr>
thymeleaf解决html转译问题
html
<p th:utext="${msg}"></p>
controller
效果：
Freemarker模板
性能优化会选择Freemarker模板
学习网站：http://freemarker.foofun.cn/
Freemarker中获取单个值写法html
直接使用el表达式：${title}，这里如果是支持的时候是会显示出人员表这几个字
Freemarker中条件语法html
<#if sex=='girl'>
女
<#elseif sex=='boy'>
男
<#else>
保密
</#if>
Freemarker中 exists用在逻辑判断html
<h3>exists用在逻辑判断</h3>
<#if name?exists>
${name}
</#if>
Freemarker中 list 循环html
<h2>循环</h2>
<table border="1px" width="600px">
<thead>
<tr>
<td>ID</td>
<td>角色名</td>
<td>描述</td>
</tr>
</thead>
<tbody>
<#list roles as role>
<tr>
<td>${role.rid}</td>
<td>${role.rname}</td>
</tr>
</#list>
</tbody>
</table>
Freemarker中 局部变量(assign)/全局变量(global)html
<h2>局部变量(assign)/全局变量(global)</h2>
<#--获取全路径名${pageContext.request.contextpath}-->
<#assign ctx1>
${springMacroRequestContext.contextPath}
</#assign>
<#global ctx2>
${springMacroRequestContext.contextPath}
</#global>
pom
<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
server:
port: 80
servlet:
context-path: /
spring:
thymeleaf:
cache: false
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role
template-loader-path: classpath:/templates/role
mvc:
static-path-pattern: /static/**
注意层级关系
相当与
springmvc.xml
internalResouresviewResolver
prefix classpath:/templates/role
subfix .ftl
配置freemarker。也可不配置，则创建ftl文件时改后缀名
Role
package com.wxm.springboot.entity.springboot2;
/**
* @author wxm
* @site www.wxm.com
* @company xxx公司
* @create 2019-12-30 8:19
*/
public class Role {
private String rid;
private String rname;
public Role(String rid, String rname) {
this.rid = rid;
this.rname = rname;
}
public Role() {
}
}
RoleController
package com.wxm.springboot.controller.springboot2;
import com.wxm.springboot.entity.springboot2.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 wxm
* @site www.wxm.com
* @company xxx公司
* @create 2019-12-30 8:19
*
*介绍Thymeleaf模板的应用
*
*/
@Controller
@RequestMapping("/freemarker")
public class RoleController {
@RequestMapping("/list")
public ModelAndView list(){
System.out.println("这是list");
ModelAndView mv = new ModelAndView();
mv.setViewName("freemarklist");
mv.addObject("name","张三");
mv.addObject("sex","gay");
List<Role> list = new ArrayList();
list.add(new Role("1","超级会员"));
list.add(new Role("2","会员"));
list.add(new Role("3","普通用户"));
mv.addObject("roles",list);
return mv;
}
}
注意application.yml的配置一致性
freemarklist.ftl
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Freemarker模板知识点</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>${role.rname}</td>
</tr>
</#list>
</tbody>
</table>
<h2>include</h2>
<#include 'foot.ftl'>
<h2>局部变量(assign)/全局变量(global)</h2>
<#--获取全路径名${pageContext.request.contextpath}-->
<#assign ctx1>
${springMacroRequestContext.contextPath}
</#assign>
<#global ctx2>
${springMacroRequestContext.contextPath}
</#global>
${ctx1}---和---${ctx2}
</body>
</html>
解决报错：缺失实体类get.set问题
FreeMarker template error (DEBUG mode; use RETHROW in production!): The following has evaluated to null or missing: ==> role.rid [in template “freemarklist.ftl” at line 38, column 15] ---- Tip: It’s the step after the last dot that caused this error, not those before it. ---- Tip: If the failing expression is known to legally refer to something that’s sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? ---- ---- FTL stack trace ("~" means nesting-related): - Failed at:
IterationContext.executedNestedContentForCollOrSeqListing(IteratorBlock.java:321) at freemarker.core.IteratorBlock
IterationContext.accept(IteratorBlock.java:244) at 
解决报错ftl文件没有在application.xml对应得位置下
FreeMarker template error (DEBUG mode; use RETHROW in production!): Template inclusion failed (for parameter value “…/foot.ftl”): Template not found for name “…/foot.ftl”. Reason given: Backing out from the root directory is not allowed. The name was interpreted by this TemplateLoader: MultiTemplateLoader(loader1 = FileTemplateLoader(baseDir=“E:\重要备份\idea1122\springboot\target\classes\templates\role”, canonicalBasePath=“E:\重要备份\idea1122\springboot\target\classes\templates\role”), loader2 = ClassTemplateLoader(resourceLoaderClass=org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer, basePackagePath="" /* relatively to resourceLoaderClass pkg */)). ---- FTL stack trace ("~" means nesting-related): - Failed at: #include “…/foot.ftl” [in template “freemarklist.ftl” at line 46, column 1] ---- Java stack trace (for programmers): ---- freemarker.core._MiscTemplateException: [… Exception message was already printed; see it above …] at freemarker.core.Include.accept(Include.java:164) at freemarker.core.Environment.visit(Environment.java:331) at freemarker.core.Environment.visit(Environment.java:337) at freemarker.core.Environment.process(Environment.java:310) at freemarker.template.Template.process(Template.java:383) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:391) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:304) at
完整效果
