六、SpringBoot之Thymeleaf模板引擎使用

市面上的模版引擎：JSP、Velocity、Freemarker、Thymeleaf

SpringBoot推荐的Thymeleaf：语法更简单，功能更强大；

1、引入Thymeleaf

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
切换thymeleaf版本
<properties>
   <thymeleaf.version>3.0.9.RELEASE</thymeleaf.version>
   <!-- 布局功能的支持程序  thymeleaf3主程序 适配 layout2以上版本 -->
   <!-- thymeleaf2 适配  layout1-->
   <thymeleaf-layout-dialect.version>2.2.2</thymeleaf-layout-dialect.version>
</properties>

2、Thymeleaf使用

@ConfigurationProperties(
    prefix = "spring.thymeleaf"
)
public class ThymeleafProperties {
    private static final Charset DEFAULT_ENCODING;
    //只要我们把HTML页面放在classpath:/templates/，thymeleaf就能自动渲染；
    public static final String DEFAULT_PREFIX = "classpath:/templates/";
    public static final String DEFAULT_SUFFIX = ".html";
    private boolean checkTemplate = true;
    private boolean checkTemplateLocation = true;
    private String prefix = "classpath:/templates/";
    private String suffix = ".html";
    private String mode = "HTML";
    private Charset encoding;
    private boolean cache;
    private Integer templateResolverOrder;
    private String[] viewNames;
    private String[] excludedViewNames;
    private boolean enableSpringElCompiler;
    private boolean enabled;
    private final ThymeleafProperties.Servlet servlet;
    private final ThymeleafProperties.Reactive reactive;

使用步骤：

1.java

    @RequestMapping("/success")
    public String success(Map<String,Object> map){
        map.put("hello","<h1>你好</h1>");
        map.put("users",Arrays.asList("zhangsan","lisi","wangwu"));
        //会去找classpath:/templates/success.html
        return "success";
    }

2.导入thymeleaf的名称空间

<html lang="en" xmlns:th="http://www.thymeleaf.org">

3.使用thymeleaf语法；

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>成功！</h1>
<!--th:text 将div里面的文本内容设置为 -->
<div id="div01" name="myDiv" th:id="${hello}" th:name="${hello}" th:text="${hello}">这是显示欢迎信息</div>
<hr/>
<div th:text="${hello}"></div>
<div th:utext="${hello}"></div>
<hr/>

<!-- th:each每次遍历都会生成当前这个标签：3个h4-->
<h4 th:text="${user}" th:each="user:${users}"></h4>
<hr/>
<h4>
   <span th:each="user:${users}">[[${user}]]</span>
</h4>
</body>
</html>

3、Thymeleaf语法规则

1.th:text；改变当前元素里面的文本内容；

th：任意html属性；来替换原生属性的值

2.表达式

thymeleaf操作文档

六、SpringBoot之Thymeleaf模板引擎使用

1、引入Thymeleaf

2、Thymeleaf使用

3、Thymeleaf语法规则

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