報錯顯示如下：

DescriptionResourcePathLocationType

The container 'Maven Dependencies' references non existing library 'C:\Users\CCai\.m2\repository\com\github\pagehelper\pagehelper\3.4.2-fix\pagehelper-3.4.2-fix.jar'roseonly-manager-daoBuild pathBuild Path Problem
The container 'Maven Dependencies' references non existing library 'C:\Users\CCai\.m2\repository\com\github\pagehelper\pagehelper\3.4.2-fix\pagehelper-3.4.2-fix.jar'roseonly-manager-serviceBuild pathBuild Path Problem
The container 'Maven Dependencies' references non existing library 'C:\Users\CCai\.m2\repository\com\github\pagehelper\pagehelper\3.4.2-fix\pagehelper-3.4.2-fix.jar'roseonly-manager-webBuild pathBuild Path Problem
Build path specifies execution environment JavaSE-1.7. There are no JREs installed in the workspace that are strictly compatible with this environment. roseonly-commonBuild pathJRE System Library Problem

Build path specifies execution environment JavaSE-1.7. There are no JREs installed in the workspace that are strictly compatible with this environment. roseonly-manager-pojoBuild pathJRE System Library Problem

DescriptionResourcePathLocationType
The project cannot be built until build path errors are resolvedroseonly-manager-daoUnknownJava Problem
The project cannot be built until build path errors are resolvedroseonly-manager-serviceUnknownJava Problem
The project cannot be built until build path errors are resolvedroseonly-manager-webUnknownJava Problem

DescriptionResourcePathLocationType
Missing artifact com.github.pagehelper:pagehelper:jar:3.4.2-fixpom.xml/roseonly-manager-daoline 30Maven Dependency Problem
Missing artifact com.github.pagehelper:pagehelper:jar:3.4.2-fixpom.xml/roseonly-manager-serviceline 2Maven Dependency Problem
Missing artifact com.github.pagehelper:pagehelper:jar:3.4.2-fixpom.xml/roseonly-manager-webline 2Maven Dependency Problem

截圖如下：

解決方法：

儘管報這麼多的錯，歸根到底就是jar包的問題，只需要把<pagehelper.version>3.4.2-fix</pagehelper.version>改成<pagehelper.version>3.2.1</pagehelper.version>即可，ctrl+s進行儲存，報錯資訊自會自動消失了。

截圖如下：