Maven安裝成功後，總是無法成功mvn install？解決方法是JDK設定的問題。
阿新 • • 發佈：2019-02-04
[INFO] Changes detected - recompiling the module! [INFO] Compiling 164 source files to G:\Maven\jfinal\target\classes [INFO] ------------------------------------------------------------- [ERROR] COMPILATION ERROR : [INFO] ------------------------------------------------------------- [ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK? [INFO] 1 error [INFO] ------------------------------------------------------------- [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 03:24 min [INFO] Finished at: 2017-04-24T19:26:25+08:00 [INFO] Final Memory: 13M/122M [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project jfinal_cms: Compilation failure [ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK? [ERROR] [ERROR] -> [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/MojoFailureException G:\Maven\jfinal>
我重新執行mvn install，直接報錯
G:\Maven\jfinal>mvn install [INFO] Scanning for projects... [WARNING] [WARNING] Some problems were encountered while building the effective model for com.jflyfox:jfinal_cms:war:4.5.0 [WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 162, column 12 [WARNING] The expression ${artifactId} is deprecated. Please use ${project.artifactId} instead. [WARNING] The expression ${artifactId} is deprecated. Please use ${project.artifactId} instead. [WARNING] The expression ${artifactId} is deprecated. Please use ${project.artifactId} instead. [WARNING] [WARNING] It is highly recommended to fix these problems because they threaten the stability of your build. [WARNING] [WARNING] For this reason, future Maven versions might no longer support building such malformed projects. [WARNING] [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building jfinal_cms 4.5.0 [INFO] ------------------------------------------------------------------------ [WARNING] The POM for com.ibeetl:beetl:jar:2.7.11 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details [INFO] [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ jfinal_cms --- [INFO] Using 'UTF-8' encoding to copy filtered resources. [INFO] Copying 8 resources [INFO] [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ jfinal_cms --- [INFO] Changes detected - recompiling the module! [INFO] Compiling 164 source files to G:\Maven\jfinal\target\classes [INFO] ------------------------------------------------------------- [ERROR] COMPILATION ERROR : [INFO] ------------------------------------------------------------- [ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK? [INFO] 1 error [INFO] ------------------------------------------------------------- [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 1.179 s [INFO] Finished at: 2017-04-24T19:31:02+08:00 [INFO] Final Memory: 10M/155M [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project jfinal_cms: Compilation failure [ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK? [ERROR] [ERROR] -> [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/MojoFailureException
這個問題怎麼都無法解決，重新在eclipse和myeclipse中重新配置JDK路徑還是無法解決。
不知道是不是和我最開始嫌棄maven下載太慢，在maven目錄中修改了setting.xml下載路徑，換成aliyun埠。雖然貌似前幾次下載依舊不成功，我反覆嘗試mvn install，結果就杯具了。。。。
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出現這個而問題之後我改變了一個思路來做，我重新設定了maven的本地倉庫地址，把預設到C:\Users\hasee\.m2\repository的地址改成了我自己設定的地址：D:\Mavenm2\m2\repository；具體的修改方法看這兩個引用連結：
http://www.cnblogs.com/liunanjava/archive/2015/11/05/4936037.html 或者http://xiaocao000.iteye.com/blog/1758639 這兩篇博主的文章都可以，也許覺得不夠詳細，那麼可以再參考百度問答的一個連結：https://zhidao.baidu.com/question/1769645808405821420.html
言歸正傳，這次我修改了本地倉庫地址後，重新到專案檔案下用控制檯輸入mvn install這次就沒有報之前的錯誤，報出了一個新錯誤：
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 01:53 h
[INFO] Finished at: 2017-04-24T21:48:55+08:00
[INFO] Final Memory: 11M/127M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project jfinal_cms: Execution default-compile of goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile failed: 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-artifact:jar:2.0.9, org.apache.maven.shared:maven-shared-utils:jar:0.1, com.google.collections:google-collections:jar:1.0: Could not transfer artifact org.apache.maven:maven-artifact:jar:2.0.9 from/to central (https://repo.maven.apache.org/maven2): GET request of: org/apache/maven/maven-artifact/2.0.9/maven-artifact-2.0.9.jar from central failed: Read timed out -> [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/PluginResolutionException
沒有想到竟然還是會報錯。。。。。。。。。
修改maven目錄conj下的setting.xml檔案和本地倉庫下的setting.xml檔案中的：
<profiles>
<!-- profile
| Specifies a set of introductions to the build process, to be activated using one or more of the
| mechanisms described above. For inheritance purposes, and to activate profiles via <activatedProfiles/>
| or the command line, profiles have to have an ID that is unique.
|
| An encouraged best practice for profile identification is to use a consistent naming convention
| for profiles, such as 'env-dev', 'env-test', 'env-production', 'user-jdcasey', 'user-brett', etc.
| This will make it more intuitive to understand what the set of introduced profiles is attempting
| to accomplish, particularly when you only have a list of profile id's for debug.
|
| This profile example uses the JDK version to trigger activation, and provides a JDK-specific repo.
<profile>
<id>jdk-1.8</id>
<activation>
<jdk>1.8</jdk>
</activation>
<repositories>
<repository>
<id>jdk18</id>
<name>Repository for JDK 1.8 builds</name>
<url>http://www.myhost.com/maven/jdk18</url>
<layout>default</layout>
<snapshotPolicy>always</snapshotPolicy>
</repository>
</repositories>
</profile>把其中的JDK版本全部修改成自己本機的JDK版本，不知道的可以控制檯Java -version檢視
修改完成之後我就把我的本機本地倉庫中的maven下載清空，控制檯到專案根目錄直接mvn install，現在重新下載中：
希望這次可以成功啊
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這次果然成功了！！！
[INFO] Installing G:\Maven\jfinal\target\jfinal_cms.war to D:\Mavenm2\m2\repository\com\jflyfox\jfinal_cms\4.5.0\jfinal_cms-4.5.0.war
[INFO] Installing G:\Maven\jfinal\pom.xml to D:\Mavenm2\m2\repository\com\jflyfox\jfinal_cms\4.5.0\jfinal_cms-4.5.0.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 10:12 min
[INFO] Finished at: 2017-04-25T14:27:06+08:00
[INFO] Final Memory: 22M/156M
[INFO] ------------------------------------------------------------------------
這次竟然成功了，困擾我兩天的問題。
仔細思考了一下，這個問題的原因還是JDK的配置的問題，按照網上查出來的相關解決辦法，我一步一步的來改變了Eclipse和Myeclipse中的maven設定和JDK路徑；
依然出現專案目錄下mvn -install不成功的情況；都是提示JDK版本不一致或者是沒有JDK的執行環境；
我最後檢視maven的配置檔案setting.xml修改其中間的JDK配置， 按照本機的配置來，就沒有報錯了。
所以最後的解決辦法是 再三確認JDK環境為何不能被Maven識別？？？？？
1，要麼就是eclipse和myeclipse中路徑有問題；
2，要麼就是POM.xml檔案中JDK不匹配；
3，要麼就是Maven目錄和本地.m2本地倉庫目錄中的setting.xml中的JDK與本機JDK環境不匹配；
當然這三個前提是建立在確認JDK環境正確安裝,環境變數都已經正確配置，Maven正確安裝等這些情況下。