使用命令行从 Nexus 下载具有依赖项的 Maven 工件
download of a Maven artifact with dependencies from Nexus using the command line
我正在使用下面的命令通过命令行从 Nexus 下载一个 maven jar。
call mvn org.apache.maven.plugins:maven-dependency-plugin:2.4:get -DrepoUrl=http://10.101.15.190:8081/nexus/content/repositories/releases/ -Dartifact=bits:update-service:1.0.3 -Ddest=Setups/Services/update-service.jar
但是我得到的是一个没有依赖项的jar。 Maven 中已经有一个名为 update-service-1.0.4-jar-with-dependencies.jar
的依赖项的 jar
我尝试了以下方法：
call mvn org.apache.maven.plugins:maven-dependency-plugin:2.4:get -DrepoUrl=http://10.101.15.190:8081/nexus/content/repositories/releases/ -Dartifact=bits:update-service:1.0.3[:packaging[:jar]] -Ddest=Setups/Services/update-service.jar
但是returns出现以下错误：
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-dependency-plugin:2.4:get (default-cli) on project standalone-pom: Couldn't download artifact: Missing:
[ERROR] ----------
[ERROR] 1) bits:update-service:packaging[:jar]]:1.0.3[
[ERROR]
[ERROR] Try downloading the file manually from the project website.
[ERROR]
[ERROR] Then, install it using the command:
[ERROR] mvn install:install-file -DgroupId=bits -DartifactId=update-service -Dversion=1.0.3[ -Dclassifier=jar]] -Dpackaging=packaging[ -Dfile=/path/to/file
[ERROR]
[ERROR] Alternatively, if you host your own repository you can deploy the file there:
[ERROR] mvn deploy:deploy-file -DgroupId=bits -DartifactId=update-service -Dversion=1.0.3[ -Dclassifier=jar]] -Dpackaging=packaging[ -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]
[ERROR]
[ERROR] Path to dependency:
[ERROR] 1) org.apache.maven.plugins:maven-downloader-plugin:jar:1.0
[ERROR] 2) bits:update-service:packaging[:jar]]:1.0.3[
[ERROR]
[ERROR] ----------
[ERROR] 1 required artifact is missing.
[ERROR]
[ERROR] for artifact:
[ERROR] org.apache.maven.plugins:maven-downloader-plugin:jar:1.0
[ERROR]
[ERROR] from the specified remote repositories:
[ERROR] central (https://repo.maven.apache.org/maven2, releases=true, snapshots=false),
[ERROR] temp (http://10.101.15.190:8081/nexus/content/repositories/releases/, releases=true, snapshots=true)
[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/MojoExecutionException
问题：下载带有依赖的jar的正确方法是什么？
jar-with-dependencies 在这种情况下是 Maven classifier:
The classifier allows to distinguish artifacts that were built from the same POM but differ in their content. It is some optional and arbitrary string that - if present - is appended to the artifact name just after the version number.
也就是说，1.0.4 jar 及其 with-dependencies 变体通过分类器在 Maven 坐标上有所不同。
因此，使用 maven-dependency-plugin 及其 get goal you can specify a classifier via the classifier 选项：
The classifier of the artifact to download. Ignored if artifact is used.
但是，您确实已经在使用 artifact 选项，因此根据文档，上述选项将被忽略。
但是，如果您查看 artifact 选项的文档：
A string of the form groupId:artifactId:version[:packaging][:classifier].
查看它的最后一个（可选）标记，[:classifier]。这正是您所缺少的。
您的 artifact 选项应如下所示：
-Dartifact=bits:update-service:1.0.4:jar:jar-with-dependencies
注意：你在指定的时候其实已经用错了：
-Dartifact=bits:update-service:1.0.3[:packaging[:jar]]
方括号[..]表示可选参数，您不应在命令行调用中指定它们。此外，那里的 packaging 字符串指定要放置的值：同样，您不应指定它，而只需将其替换为相应的值（在本例中为 jar）。
我创建了一个示例来向您展示方法。
我想下载spring-webmvc 4.2.5.RELEASE所有依赖。
1) 如果您的本地存储库中还没有，您需要 webmvc 的 pom。如果 spring-webmvc 已经在本地仓库中，则跳过 1)。
2) 可以下载刚才下载的pom相关的所有依赖
- pom 下载
C:\temp\spring_web_mvc>mvn org.apache.maven.plugins:maven-dependency-plugin:2.10:get -DgroupId=org.springframework -DartifactId=spring-webmvc
-Dversion=4.2.5.RELEASE -Dtype=pom
- 正在下载所有依赖项
C:\temp\spring_web_mvc>mvn org.apache.maven.plugins:maven-dependency-plugin:2.10:copy-dependencies -f C:\repository2\org\springframework\spring-webmvc.2.5.RELEASE\spring-webmvc-4.2.5.RELEASE.pom -DoutputDirectory=C:\TEMP
[INFO] Scanning for projects...
[WARNING] Some problems were encountered while building the effective model for org.springframework:spring-webmvc:jar:4.2.5.RELEASE
...
[INFO] ------------------------------------------------------------------------
[INFO] Building Spring Web MVC 4.2.5.RELEASE
[INFO] ------------------------------------------------------------------------
[WARNING] The POM for com.lowagie:itext:jar:2.1.7.js4 is missing, no dependency information available
[INFO]
[INFO] --- maven-dependency-plugin:2.10:copy-dependencies (default-cli) @ spring-webmvc ---
[WARNING] The POM for org.apache.maven.doxia:doxia-sink-api:jar:1.0 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[INFO] org.apache.tiles:tiles-request-mustache:jar:1.0.6 already exists in destination.
[INFO] com.fasterxml.jackson.dataformat:jackson-dataformat-xml:jar:2.6.5 already exists in destination.
[INFO] org.apache.tiles:tiles-mvel:jar:3.0.5 already exists in destination.
[INFO] org.apache.tiles:tiles-jsp:jar:2.2.2 already exists in destination.
[INFO] org.jfree:jcommon:jar:1.0.23 already exists in destination.
...
[INFO] org.apache.tiles:tiles-extras:jar:3.0.5 already exists in destination.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.095 s
[INFO] Finished at: 2016-06-23T11:06:03+02:00
[INFO] Final Memory: 14M/241M
[INFO] ------------------------------------------------------------------------
结果：
C:\temp\spring_web_mvc>dir
Volume in drive C has no label.
Volume Serial Number is F400-3CE5
Directory of C:\temp\spring_web_mvc
23/06/2016 11:05 .
23/06/2016 11:05 ..
23/06/2016 10:24 4,467 aopalliance-1.0.jar
23/06/2016 10:24 192,035 bcmail-jdk14-1.38.jar
23/06/2016 10:24 192,035 bcmail-jdk14-138.jar
...
我正在使用下面的命令通过命令行从 Nexus 下载一个 maven jar。
call mvn org.apache.maven.plugins:maven-dependency-plugin:2.4:get -DrepoUrl=http://10.101.15.190:8081/nexus/content/repositories/releases/ -Dartifact=bits:update-service:1.0.3 -Ddest=Setups/Services/update-service.jar
但是我得到的是一个没有依赖项的jar。 Maven 中已经有一个名为 update-service-1.0.4-jar-with-dependencies.jar
我尝试了以下方法：
call mvn org.apache.maven.plugins:maven-dependency-plugin:2.4:get -DrepoUrl=http://10.101.15.190:8081/nexus/content/repositories/releases/ -Dartifact=bits:update-service:1.0.3[:packaging[:jar]] -Ddest=Setups/Services/update-service.jar
但是returns出现以下错误：
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-dependency-plugin:2.4:get (default-cli) on project standalone-pom: Couldn't download artifact: Missing:
[ERROR] ----------
[ERROR] 1) bits:update-service:packaging[:jar]]:1.0.3[
[ERROR]
[ERROR] Try downloading the file manually from the project website.
[ERROR]
[ERROR] Then, install it using the command:
[ERROR] mvn install:install-file -DgroupId=bits -DartifactId=update-service -Dversion=1.0.3[ -Dclassifier=jar]] -Dpackaging=packaging[ -Dfile=/path/to/file
[ERROR]
[ERROR] Alternatively, if you host your own repository you can deploy the file there:
[ERROR] mvn deploy:deploy-file -DgroupId=bits -DartifactId=update-service -Dversion=1.0.3[ -Dclassifier=jar]] -Dpackaging=packaging[ -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]
[ERROR]
[ERROR] Path to dependency:
[ERROR] 1) org.apache.maven.plugins:maven-downloader-plugin:jar:1.0
[ERROR] 2) bits:update-service:packaging[:jar]]:1.0.3[
[ERROR]
[ERROR] ----------
[ERROR] 1 required artifact is missing.
[ERROR]
[ERROR] for artifact:
[ERROR] org.apache.maven.plugins:maven-downloader-plugin:jar:1.0
[ERROR]
[ERROR] from the specified remote repositories:
[ERROR] central (https://repo.maven.apache.org/maven2, releases=true, snapshots=false),
[ERROR] temp (http://10.101.15.190:8081/nexus/content/repositories/releases/, releases=true, snapshots=true)
[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/MojoExecutionException
问题：下载带有依赖的jar的正确方法是什么？
jar-with-dependencies 在这种情况下是 Maven classifier:
The classifier allows to distinguish artifacts that were built from the same POM but differ in their content. It is some optional and arbitrary string that - if present - is appended to the artifact name just after the version number.
也就是说，1.0.4 jar 及其 with-dependencies 变体通过分类器在 Maven 坐标上有所不同。
因此，使用 maven-dependency-plugin 及其 get goal you can specify a classifier via the classifier 选项：
The classifier of the artifact to download. Ignored if
artifactis used.
但是，您确实已经在使用 artifact 选项，因此根据文档，上述选项将被忽略。
但是，如果您查看 artifact 选项的文档：
A string of the form
groupId:artifactId:version[:packaging][:classifier].
查看它的最后一个（可选）标记，[:classifier]。这正是您所缺少的。
您的 artifact 选项应如下所示：
-Dartifact=bits:update-service:1.0.4:jar:jar-with-dependencies
注意：你在指定的时候其实已经用错了：
-Dartifact=bits:update-service:1.0.3[:packaging[:jar]]
方括号[..]表示可选参数，您不应在命令行调用中指定它们。此外，那里的 packaging 字符串指定要放置的值：同样，您不应指定它，而只需将其替换为相应的值（在本例中为 jar）。
我创建了一个示例来向您展示方法。
我想下载spring-webmvc 4.2.5.RELEASE所有依赖。
1) 如果您的本地存储库中还没有，您需要 webmvc 的 pom。如果 spring-webmvc 已经在本地仓库中，则跳过 1)。
2) 可以下载刚才下载的pom相关的所有依赖
- pom 下载
C:\temp\spring_web_mvc>mvn org.apache.maven.plugins:maven-dependency-plugin:2.10:get -DgroupId=org.springframework -DartifactId=spring-webmvc -Dversion=4.2.5.RELEASE -Dtype=pom
- 正在下载所有依赖项
C:\temp\spring_web_mvc>mvn org.apache.maven.plugins:maven-dependency-plugin:2.10:copy-dependencies -f C:\repository2\org\springframework\spring-webmvc.2.5.RELEASE\spring-webmvc-4.2.5.RELEASE.pom -DoutputDirectory=C:\TEMP
[INFO] Scanning for projects...
[WARNING] Some problems were encountered while building the effective model for org.springframework:spring-webmvc:jar:4.2.5.RELEASE
...
[INFO] ------------------------------------------------------------------------
[INFO] Building Spring Web MVC 4.2.5.RELEASE
[INFO] ------------------------------------------------------------------------
[WARNING] The POM for com.lowagie:itext:jar:2.1.7.js4 is missing, no dependency information available
[INFO]
[INFO] --- maven-dependency-plugin:2.10:copy-dependencies (default-cli) @ spring-webmvc ---
[WARNING] The POM for org.apache.maven.doxia:doxia-sink-api:jar:1.0 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[INFO] org.apache.tiles:tiles-request-mustache:jar:1.0.6 already exists in destination.
[INFO] com.fasterxml.jackson.dataformat:jackson-dataformat-xml:jar:2.6.5 already exists in destination.
[INFO] org.apache.tiles:tiles-mvel:jar:3.0.5 already exists in destination.
[INFO] org.apache.tiles:tiles-jsp:jar:2.2.2 already exists in destination.
[INFO] org.jfree:jcommon:jar:1.0.23 already exists in destination.
...
[INFO] org.apache.tiles:tiles-extras:jar:3.0.5 already exists in destination.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.095 s
[INFO] Finished at: 2016-06-23T11:06:03+02:00
[INFO] Final Memory: 14M/241M
[INFO] ------------------------------------------------------------------------
结果：
C:\temp\spring_web_mvc>dir
Volume in drive C has no label.
Volume Serial Number is F400-3CE5
Directory of C:\temp\spring_web_mvc
23/06/2016 11:05 .
23/06/2016 11:05 ..
23/06/2016 10:24 4,467 aopalliance-1.0.jar
23/06/2016 10:24 192,035 bcmail-jdk14-1.38.jar
23/06/2016 10:24 192,035 bcmail-jdk14-138.jar ...