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在发布工程开发版本，部署版本时，遇见两个问题，一个是配置setting.xml和工程pom.xml文件的server的ID名称一致性问题，第二个是发布部署版本时，nexus不允许同一版本重复部署，这个需要进行设置。先解决如下。

1.setting.xml中的server便签中的ID属性值必须和pom.xml中的 <distributionManagement>  -》 <repository>下的ID保持一致，这是引导工程发布到nexus中的权限验证处理，如果不一致，会报错：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.7:deploy (default-deploy) on project *: Failed to deploy artifacts: Could not transfer artifact *:jar:1.0 from/to releases (http://10.1.81.199:8081/nexus/content/repositories/releases/): Failed to transfer file:* /1.0/*-1.0.jar. Return code is: 401, ReasonPhrase:Unauthorized.（在发布时未授权）

所以，这两处ID要保持一致。

pom.xml

  

setting.xml

2.默认情况下，nexus中部署版本不允许重复发布，但是有时候因为某些改动，变更，需要在本次版本发布，所以就要把解决该问题。否则，无法重复发布该版本。

   [ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.7:

                  deploy (default-deploy) on project First2: Failed to deploy artifacts:                  Could not transfer artifact com.myd.cn:First2:jar:1.0 from/to my-nexus-releases                  (http://127.0.0.1:8081/nexus/content/repositories/releases):                  Failed to transfer file: http://127.0.0.1:8081/nexus/content/repositories/releases/com/myd/cn/First2/1.0/First2-1.0.jar.                 Return code is: 400, ReasonPhrase: Bad Request. -> [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]     [ERROR] After correcting the problems, you can resume the build with the command     [ERROR]   mvn <goals> -rf :First2

所以，进入nexus的releases仓库，设置部署版本为允许重复发布。