1、在pom.xml添加如下内容：
<dependency> <groupId>org.apache.tomcat.embed</groupId> <artifactId>tomcat-embed-jasper</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>org.apache.tomcat</groupId> <artifactId>tomcat-jsp-api</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <scope>provided</scope> </dependency>
我的pom.xml之前有这么一段依赖代码，需要注释掉，我试了一下，不注释也不影响（重复引用？）：
<!-- <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> <scope>provided</scope> </dependency> -->
要注意的是scope需要指定为provided
不添加这些对应的引用会出现各种错误，404找不到文件，或者直接把jsp页面下载等等
2、在springboot的配置文件application.properties添加如下内容：
#spring mvc configuration
spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp
3、编写测试代码
Test2Controller.java
@Controller public class Test2Controller { @GetMapping("test20") public String test20() { return "test20"; } }
test20.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> test20 </body> </html>
我的目录结构：
