程序包org.springframework.boot不存在，但对我不起作用

Question

我正在尝试在IntelliJ中运行spring boot项目，在编译代码时遇到了问题。详解如下。

**bold**以下错误**bold**

`javac StudentApplication.java

studentapplication.java：6：错误：包org.springframework.boot不存在导入org.springframework.boot.springapplication；^StudentApplication.java:7:错误：包org.springframework.boot.autocigure不存在导入org.springframework.boot.autocigure.springbootApplication；^StudentApplication.java:9:错误：找不到符号@SpringBootApplication^symbol:class SpringBootApplication StudentApplication.java:14:错误：找不到符号SpringApplication.Run(^symbol:variable SpringApplication Location：class StudentApplication 4 errors`

下面是我的StudentApplication.java“我正在SpringApplication.Run中获取错误”

//import org.springframework.context.ApplicationContext;


import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class StudentApplication {

  public static void main(String[] args) {
    //ApplicationContext ctx =
        SpringApplication.run(
        StudentApplication.class, args);
    //System.out.println(ctx);
  }
}

下面是我的porm.xml“，列表为”“”

<?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 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>2.4.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>info.inet</groupId>
    <artifactId>coursestudent</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>coursestudent</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>11</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.dataformat</groupId>
            <artifactId>jackson-dataformat-xml</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-rest-hal-browser</artifactId>
            <version> 3.3.6.RELEASE </version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

我无法解决它。即使在porm.xml文件中添加了依赖项之后也是如此。任何能帮我的人。如果需要，我会推git查看完整的代码。但请不要不必要地关上它。“

Answer 1

您的远程maven回购是否更新？检查

Settings -> Build, Execution, Deployment -> Build tools -> Maven -> Repositories