maven多模組專案打包的時候報錯如下：
[ERROR] [ERROR] Some problems were encountered while processing the POMs: [FATAL] Non-resolvable parent POM for com.xxx.cloud:common:1.0-SNAPSHOT: Could not find artifact com.xxx.cloud:xxx-cloud:pom:1.0-SNAPSHOT and 'parent.relativePath' points at wrong local POM @ line 5, column 13 @ [ERROR] The build could not read 1 project -> [Help 1] [ERROR] [ERROR] The project com.xxx.cloud:common:1.0-SNAPSHOT (xxx\common\common\pom.xml) has 1 error [ERROR] Non-resolvable parent POM for com.xxx.cloud:common:1.0-SNAPSHOT: Could not find artifact com.xxx.cloud:xxx-cloud:pom:1.0-SNAPSHOT and 'parent.relativePath' points at wrong local POM @ line 5, column 13 -> [Help 2] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException [ERROR] [Help 2] http://cwiki.apache.org/confluence/display/MAVEN/UnresolvableModelException
找了很久原因，終於找到，這個是maven多模組專案，之前的做法是將多個模組放父級pom.xml同級下，所以沒問題，現在我將模組按功能分成了三大類，放三個目錄下，因此pom.xml的模組引用路徑需要改一下：
1.父pom.xml引用子級模組時需要增加相對路徑：
2.子模組引用parent時，需要增加以下程式碼（我就是少了這行所以報錯，具體路徑得看你子模組的pom.xml和父pom.xml差多少層目錄，我的是差兩層）：
<relativePath>../../pom.xml</relativePath>
