Maven奇奇怪怪报错（大总结）

重启项目后莫名其妙报错

Description Resource Path Location Type
Project build error: Non-resolvable parent POM for cn.e3mall:e3-common:0.0.1-SNAPSHOT: Could not find artifact cn.e3mall:e3-parent:pom:0.0.1-SNAPSHOT and 'parent.relativePath' points at wrong local POM pom.xml /e3-common line 3 Maven pom Loading Problem

Description Resource Path Location Type
Missing artifact cn.e3mall:e3-common:jar:0.0.1-SNAPSHOT pom.xml /e3-manager-web line 3 Maven Dependency Problem

Description Resource Path Location Type
The container 'Maven Dependencies' references non existing library 'C:\Users\20196.m2\repository\cn\e3mall\e3-common\0.0.1-SNAPSHOT\e3-common-0.0.1-SNAPSHOT.jar' e3-manager-dao Build path Build Path Problem

处理方法：
选中项目后在maven这里选择update project