六、SpringBoot之Thymeleaf模板引擎使用
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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
-
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