No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?

解決方法

問題是將JRE作為JDK使用了，解決辦法是安裝JDK，並將JDK設定到Installed JREs中

圖示

錯誤堆疊

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project hibernate: Compilation failure
[ERROR] No compiler is
 
 provided in this environment. Perhaps you are running on a JRE rather than a JDK?
[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

Failed to transfer http://xx.xx. Error code 400, Repository version policy: RELEASE does not allow metadata in path: cn/blueboz/train/hibernate/0.0.1-SNAPSHOT/maven-metadata.xml -> [Help 1]

問題原因

如果是deploy 出現問題，那麼可能是因為將部署路徑寫錯，如本例子，錯誤在於將SNAPSHOT版本寫成RELEASE版本

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.7:deploy (default-deploy) on project hibernate: Failed to retrieve remote metadata cn.blueboz.train:hibernate:0.0.1-SNAPSHOT/maven-metadata.xml: Could not transfer metadata cn.blueboz.train:hibernate:0.0.1-SNAPSHOT/maven-metadata.xml from/to blueboz-snapshots (http://bluebozpc:8081/repository/maven-releases): Failed to transfer http://bluebozpc:8081/repository/maven-releases/cn/blueboz/train/hibernate/0.0.1-SNAPSHOT/maven-metadata.xml. Error code 400, Repository version policy: RELEASE does not allow metadata in path: cn/blueboz/train/hibernate/0.0.1-SNAPSHOT/maven-metadata.xml -> [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/MojoExecutionException

#

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.7:deploy (default-deploy) on project hibernate: Failed to deploy artifacts: Could not transfer artifact cn.blueboz.train:hibernate:jar:0.0.1-20170319.142156-1 from/to blueboz-snapshots (http://bluebozpc:8081/repository/maven-snapshots): Access denied to http://bluebozpc:8081/repository/maven-snapshots/cn/blueboz/train/hibernate/0.0.1-SNAPSHOT/hibernate-0.0.1-20170319.142156-1.jar. Error code 401, Unauthorized -> [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/MojoExecutionException

新建專案卡頓問題

將maven 的配置設定為offline,離線更新就可以了

Fail to transfer …錯誤

Failure to transfer 
    org.codehaus.plexus:plexus-archiver:jar:3.4
    was cached in the local repository, 
    resolution will not be reattempted until 
    the update interval of [Bsdn] has elapsed or updates are forced. 
    Original error: 
         org.codehaus.plexus:plexus-archiver:jar:3.4 
    Bsdn (http://nexus.bsdn.org/content/groups/public/):
    No response received after 60000

一般是因為nexus 私服連結超時，建議直接換一個私服即可，在使用者路徑下的setting中，修改成aliyun的私服

 <mirror>
  <id>Alibaba</id>
  <mirrorOf>central</mirrorOf>
  <name>AliyunMaven</name>
  <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
</mirror>

實在不行的話，根據GAV，定位到本地快取目錄，將
\M2_HOME.m2\repository\org\codehaus\plexus\plexus-archiver\3.4
目錄下的資源刪掉，重新UpdateProject即可

Update Project 的時候變成J2SE1.4

這個問題，網上提供了兩種方案先給出程式碼，如果嘗試了之後發現可以的話，請按照這種方式解決。如果還是不行，請看我的第三種終極解決方案

1.解決方法一

$HOME目錄下的.m2目錄下的settings.xml檔案的profiles節點下新增如下資訊。Jdk版本

<profile>   
    <id>jdk1.8</id>    
    <activation>   
        <activeByDefault>true</activeByDefault>    
        <jdk>1.8</jdk>   
    </activation>    
    <properties>   
        <maven.compiler.source>1.8</maven.compiler.source>    
        <maven.compiler.target>1.8</maven.compiler.target>    
        <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>   
    </properties>   
</profile>

2.解決方法二

在 build->pluginManager下新增，或修改maven-compiler-plugin的預設配置資訊

<plugin>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.7.0</version>
    <configuration>
        <source>1.8</source>
        <target>1.8</target>
    </configuration>
</plugin>

3.更新外掛方法

必須前面兩個方法都嘗試了之後，還是無效的情況下。才可以。這時候，你必須考慮是不是你的IDE的問題了。筆者使用的是EclipseKepler版本，最高支援Jdk7。

點選進入EclipseMarketPlace，輸入Maven
JavaTm 8 support for m2e for Eclipse Kepler SR2 ，安裝就可以了，建議還是翻牆安裝快些