pom.xml文件中 标签报错：

问题：主要是在本地仓库未找到jar包

Project build error: Non-resolvable parent POM: Failure to transfer org.springframework.boot:spring-boot-starter-parent:pom:2.2.6.RELEASE from http://repo1.maven.org/maven2 was cached in the 
 local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact org.springframework.boot:spring-
 boot-starter-parent:pom:2.2.6.RELEASE from/to central (http://repo1.maven.org/maven2): Failed to transfer http://repo1.maven.org/maven2/org/springframework/boot/spring-boot-starter-parent/
 2.2.6.RELEASE/spring-boot-starter-parent-2.2.6.RELEASE.pom. Error code 501, HTTPS Required and 'parent.relativePath' points at no local POM

解决方案：

在maven的配置文件文件库

在conf文件夹下找到setting.xml文件，在文件的标签下添加以下库：

        
	      
		alimaven      
		aliyun maven      
		http://maven.aliyun.com/nexus/content/groups/public/      
		central    
	  
	
	      
		alimaven      
		aliyun maven      
		http://maven.aliyun.com/nexus/content/groups/public/      
		central    
	 

在项目中找到pom.xml文件右键Run us  --> Maven clean或Maven install 下载jar