将jar deploy到私服nexus常见问题

一.出现：Cannot deploy artifacts when Maven is in offline mode -> [Help 1]

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.7:deploy (default-deploy) on project acpe-common: Cannot deploy artifacts when Maven is in offline mode -> [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

解决办法：原因是intellij IDEA 默认为offline模式，进入Settings，把Work offline的勾去除即可。

二.Return code is: 401, ReasonPhrase: Unauthorized. -> [Help 1]

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.7:deploy (default-deploy) on project acpe-common: Failed to deploy artifacts: Could not transfer artifact com.****0.1-20181217.122106-8.jar. Return code is: 401, ReasonPhrase: 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

解决办法：
1.检查pom.xml、setting.xml 对应nexus账号密码是否错误。
2.检查pom.xml、setting.xml 对应url地址是否正确。

三.出现： Return code is: 400, ReasonPhrase: Repository does not allow updating assets: maven-releases.

搜集一些报400的原因：
1.nexus的repository分三种类型：Hosted、 Proxy和Virtual，另外还有一个repository group(仓库组)用于对多个仓库进行组合。部署的时候只能部署到Hosted类型的仓库中，如果是其他类型就会出现这个400错误。
2.默认情况下部署构件到Releases仓库中有时也会出现400错误，这个原因就像上面提到的那样，Nexus中 Releases仓库默认的Deployment Policy是“Disable Redeploy”，
所以无论你在settings.xml文件中将server的username设置为deployment还是使用admin都是无法部署的，就会出现这个400错误。
3.Nexus中 Releases仓库Respository PolicySnapshot是“Release”
Snapshot仓库Respository PolicySnapshot是“Snapshot” 如果设置反了或错了也是无法部署的。
4.如果你Snapshot可以发布，但是releases却发布不了，可能是1.0-SNAPSHOT类似这样的，version中包含了-SNAPSHOT，所以release发布不了，也会返回400错误。

解决办法：在nexus的maven-releases设置为Allow redeploy（可重复提交）即可

4.出现：Compilation failure: Compilation failure （编译失败）

解决办法：
因为jdk版本的升级导致一些api已经失效，解决的办法有很多，最好的办法是在pom.xml文件中加入如下配置（通过配置maven-compiler-plugin插件解决此问题）：
`

   <groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><configuration><source>1.8</source><target>1.8</target><testSource>1.8</testSource><testTarget>1.8</testTarget><encoding>utf-8</encoding><compilerArguments><verbose /><bootclasspath>${java.home}/lib/rt.jar;${java.home}/lib/jce.jar</bootclasspath></compilerArguments></configuration> </plugin>