springboot没有像预期的那样连接到localhost:8080？

Question

 <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 
 https://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>2.6.0-SNAPSHOT</version>
 <relativePath/> <!-- lookup parent from repository -->
 </parent>
 <groupId>net.codejava</groupId>
 <artifactId>SpringBootWebApp</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <name>SpringBootWebApp</name>
 <description>Demo project for Spring Boot</description>
 <properties>
 <java.version>16</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-test</artifactId>
 <scope>test</scope>
 </dependency>
 </dependencies>
 <build>
 <plugins>
 <plugin>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-maven-plugin</artifactId>
 </plugin>
 </plugins>
 </build>
 <repositories>
 <repository>
 <id>spring-milestones</id>
 <name>Spring Milestones</name>
 <url>https://repo.spring.io/milestone</url>
 <snapshots>
 <enabled>false</enabled>
 </snapshots>
 </repository>
 <repository>
 <id>spring-snapshots</id>
 <name>Spring Snapshots</name>
 <url>https://repo.spring.io/snapshot</url>
 <releases>
 <enabled>false</enabled>
 </releases>
 </repository>
 </repositories>
 <pluginRepositories>
 <pluginRepository>
 <id>spring-milestones</id>
 <name>Spring Milestones</name>
 <url>https://repo.spring.io/milestone</url>
 <snapshots>
 <enabled>false</enabled>
 </snapshots>
 </pluginRepository>
 <pluginRepository>
 <id>spring-snapshots</id>
 <name>Spring Snapshots</name>
 <url>https://repo.spring.io/snapshot</url>
 <releases>
 <enabled>false</enabled>
 </releases>
 </pluginRepository>
 </pluginRepositories>
 </project>

Could you please give me some ideas ? Thank you very much for you time.

Answer 1

可能缺少web初学者依赖项，您可以尝试在pom.xml（maven构建文件）中使用web依赖项吗

<dependency>  
<groupId>org.springframework.boot</groupId>  
<artifactId>spring-boot-starter-web</artifactId>  
<version>2.2.2.RELEASE</version>  
</dependency>