thymeleaf:

    suffix: .html

    check-template-location: true

    encoding: UTF-8

    content-type: text/html

    mode: LEGACYHTML5

    cache: false

        <!--thymeleaf模板引擎 start-->

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-thymeleaf</artifactId>

            <version>2.1.3.RELEASE</version>

        </dependency>

        <!--thymeleaf模板引擎 start-->