maven打包spring-boot應用時發生錯誤

Question

IDEA 應用程序告訴我Invalid packaging for parent POM org.springframework.boot:spring-boot-starter-web:1.5.9.RELEASE, must be "pom" but is "jar"而我打包了我的易啟動 spring-啟動應用程序，如何解決這個問題？ 我的平台是macOS 10.15.7，有3個JDK(1.8,11,14)，我用的是maven-3.6.3，我的maven設置也把JDK改成1.8和11，pom.xml文件如下：

<?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>

    <groupId>org.example</groupId>
    <artifactId>SpringBoot-01-HelloWorld</artifactId>
    <version>1.0</version>

    <packaging>pom</packaging>

    <parent>
        <artifactId>spring-boot-starter-web</artifactId>
        <groupId>org.springframework.boot</groupId>
        <version>1.5.9.RELEASE</version>
    </parent>

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

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


</project>

Answer 1

父 POM 應該是 Spring Boot 父項目

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.9.RELEASE</version>
</parent>