? ? ? 導(dǎo)入maven項(xiàng)目，F(xiàn)Ile→Import→Existing Maven Projects→找到自己想要導(dǎo)入的文件目錄→Finish。項(xiàng)目就導(dǎo)入完成啦。接著就遇上了各種報(bào)錯(cuò)！！
一、Pom.xml文件第一次報(bào)錯(cuò)
CoreException: Could not get the value for parameter compilerId for plugin execution default-testCompile: PluginResolutionException: Plugin org.apache.maven.plugins:maven-compiler-plugin:3.1 or one of its dependencies could not be resolved: The following artifacts could not be resolved: org.apache.maven:maven-plugin-api:jar:2.0.9, org.apache.maven:maven-artifact:jar:2.0.9, org.apache.maven:maven-core:jar:2.0.9: Failure to transfer org.apache.maven:maven-plugin-api:jar:2.0.9 from https://repo.maven.apache.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.apache.maven:maven-plugin-api:jar:2.0.9 from/to central (https://repo.maven.apache.org/maven2): connect timed out。
解決方法：
這是因?yàn)榫W(wǎng)絡(luò)原因，導(dǎo)致文件沒有下載完成。
在電腦中搜索xxx.jar.lastUpdated，并將其都刪除即可，具體步驟如下：
1）找到 {user}/.m2/repository
2）搜索“.lastupdated”。（如果不記得對(duì)應(yīng)的.m2位置，可以全計(jì)算機(jī)搜索）Windows將展示所有文件夾的目錄。
3）選中對(duì)應(yīng)的lastupdated文件，并刪除。
4）重新打開（若先前未關(guān)閉，請(qǐng)關(guān)閉后重新打開）Eclipse,右鍵報(bào)錯(cuò)的項(xiàng)目，并選擇Maven > Update Project。同時(shí)記得勾選Force Update of Snapshots/Releases". 點(diǎn)擊OK，這樣就解決了依賴關(guān)系。
二、Pom.xml文件再次報(bào)錯(cuò)
[ERROR] No goals have been specified for this build. You must specify a valid lifecycle phase or a goal in the format:or:[:]:. Available lifecycle phases are: validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy, pre-clean, clean, post-clean, pre-site, site, post-site, site-deploy. -> [Help 1][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/NoGoalSpecifiedException
解決方法：
右擊報(bào)錯(cuò)的項(xiàng)目→Properties→Project Facets→Runtimes→勾選Apache Tomcat v7.0
在Project Facets處找不到Runtimes時(shí)，需要點(diǎn)擊下圖Convert to faceted from...
三、Pox.xml最后報(bào)錯(cuò)
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project mrpapp: Compilation failure
[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
解決方法：
在eclipse中找到Window → Preferences → Java → Installed JREs，在jRE home中修改為你安裝的jdk的目錄位置。
好了，3個(gè)報(bào)錯(cuò)都被處理了，現(xiàn)在我就可以開心的運(yùn)行項(xiàng)目啦！
