问题:如果子项目中没有父标签,将不能引用父项目中所导依赖
方法一:手动添加

  <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">
    <parent>
        <artifactId>javaweb</artifactId>
        <groupId>com.liu</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>servlet-02</artifactId>

方法二:将父项目中pom文件下的依赖中的scope标签删除,重新构建子模块就可以了

<!-- https://mvnrepository.com/artifact/javax.servlet.jsp/jsp-api -->
<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.2</version>
   <scope>provided</scope>   删除
</dependency>

本文地址:https://blog.csdn.net/smart_1234/article/details/114253388