我已經看到了幾個關于這個問題的問題，但我還沒有解決這個問題：我已經檢查過它們：Springboot Whitelabel Error Page --- 我的控制器被spring找到并注冊了。Spring boot - Whitelabel 錯誤頁面--- 我的控制器帶有注釋，@Controller并且我返回與我想查看的 jsp 文件名匹配的字符串。這是我的pom.xml文件：<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>2.1.1.RELEASE</version>        <relativePath /> <!-- lookup parent from repository -->    </parent>    <groupId>com.example</groupId>    <artifactId>test</artifactId>    <version>0.0.1-SNAPSHOT</version>    <packaging>war</packaging>    <name>demo</name>    <description>Demo project for Spring Boot</description>    <properties>        <java.version>1.8</java.version>    </properties>    <dependencies>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-test</artifactId>            <scope>test</scope>        </dependency>    </dependencies>    <build>        <plugins>            <plugin>                <groupId>org.springframework.boot</groupId>                <artifactId>spring-boot-maven-plugin</artifactId>            </plugin>        </plugins>    </build></project>這是application.properties文件：server.port=8088spring.mvc.view.prefix=/WEB-INF/views/spring.mvc.view.suffix=.jsp這是文件夾結構：