如何在ssm项目中使用thymeleaf模板引擎

导包

  <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.1</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.thymeleaf</groupId>
            <artifactId>thymeleaf-spring5</artifactId>
            <version>3.0.12.RELEASE</version>
        </dependency>
    </dependencies>

web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">

    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <request-character-encoding>utf-8</request-character-encoding>
    <response-character-encoding>utf-8</response-character-encoding>
</web-app>

Springmvc.xml 分别配置

1. thymeleaf模板解析器
2. 模板引擎
3. 视图解析器

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd
">
    <mvc:default-servlet-handler/>
    <mvc:annotation-driven/>
    <context:component-scan base-package="com.tsingby"/>

    <!--    配置thymeleaf模板解析器-->
    <bean class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver" id="templateResolver">
        <property name="prefix" value="/WEB-INF/page/"/>
        <property name="suffix" value=".html"/>
        <property name="characterEncoding" value="utf-8"/>
<!--        是否设置缓存-->
        <property name="cacheable" value="false"/>
<!--        模板的类型 -->
        <property name="templateMode" value="HTML5"/>
     </bean>
<!--模板引擎-->
    <bean id="engine" class="org.thymeleaf.spring5.SpringTemplateEngine">
        <property name="templateResolver" ref="templateResolver"/>
    </bean>
<!--    视图解析器-->
    <bean class="org.thymeleaf.spring5.view.ThymeleafViewResolver" id="resolver">
        <property name="templateEngine" ref="engine"/>
    </bean>
</beans>

上面的配置相当于jsp这样的配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd
">
    <mvc:default-servlet-handler/>
    <mvc:annotation-driven/>
    <context:component-scan base-package="com.tsingby"/>


    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="resolver">
        <property name="prefix" value="/WEB-INF/page/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>

在/WEB-INF/page下创建hello.html页面 记得导入命名空间 xmlns:th="http://www.thymeleaf.org"

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div th:text="${msg}"/>
</body>
</html>

编写测试类TestController.java

package com.tsingby.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class TestController{
    @RequestMapping("/test")
    public String test(Model model){
        model.addAttribute("msg" ,"Hello,World!");
        return "hello";
    }
}

启动tomcat 在地址栏输入http://localhost:8080/test，即可回显