我正在尝试使用Maven构建Californium存储库https://github.com/eclipse/californium。键入“ mvn clean install”将给出以下输出：
[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for org.eclipse.californium:californium-core:jar:1.0.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-surefire-plugin is missing. @ line 29, column 18
[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] Reactor Build Order:
[INFO]
[INFO] Californium (Cf) Root
[INFO] Californium (Cf) Core
[INFO] Californium (Cf) Proxy
[INFO] Californium (Cf) OSGi Bundle
[INFO] Cf-PlugtestClient
[INFO] Cf-PlugtestChecker
[INFO] Cf-PlugtestServer
[INFO] Cf-HelloWorldClient
[INFO] Cf-HelloWorldServer
[INFO] Cf-SecureServer
[INFO] Cf-ExampleCrossProxy
[INFO] Cf Benchmark Server
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Californium (Cf) Root 1.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[WARNING] The POM for org.eclipse.californium:element-connector:jar:1.0-SNAPSHOT is missing, no dependency information available
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] Californium (Cf) Root ............................. FAILURE [0.097s]
[INFO] Californium (Cf) Core ............................. SKIPPED
[INFO] Californium (Cf) Proxy ............................ SKIPPED
[INFO] Californium (Cf) OSGi Bundle ...................... SKIPPED
[INFO] Cf-PlugtestClient ................................. SKIPPED
[INFO] Cf-PlugtestChecker ................................ SKIPPED
[INFO] Cf-PlugtestServer ................................. SKIPPED
[INFO] Cf-HelloWorldClient ............................... SKIPPED
[INFO] Cf-HelloWorldServer ............................... SKIPPED
[INFO] Cf-SecureServer ................................... SKIPPED
[INFO] Cf-ExampleCrossProxy .............................. SKIPPED
[INFO] Cf Benchmark Server ............................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.894s
[INFO] Finished at: Thu Jun 26 18:29:52 CEST 2014
[INFO] Final Memory: 6M/109M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project root: Could not resolve dependencies for project org.eclipse.californium:root:pom:1.0.0-SNAPSHOT: Could not find artifact org.eclipse.californium:element-connector:jar:1.0-SNAPSHOT -> [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/DependencyResolutionException
我尝试了不同的方法，但仍然不知道如何解决此错误并继续工作。谁能帮我？
更多信息：
下装和安装（MVN全新安装）Californium Element Connector https://github.com/eclipse/californium.element-connector.git使Californium的构建更进一步，但是仍然缺少一些依赖项。我认为其中之一是Scan，但是下载后，我发现它也存在一些建筑问题...
实际上，我要使用的只是基于Californium的重新配置的californium.tools（https://github.com/eclipse/californium.tools）。我检查了californium.tools的pom.xml，它已经包含必需的依赖项。但是，在构建时，出现以下错误：
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO]
[INFO] Californium (Cf) Tools
[INFO] Cf-ConsoleClient
[INFO] Cf-GUIClient
[INFO] Cf-CoAPBench
[INFO] Cf-ExampleServer
[INFO] Cf-ResourceDirectory
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Californium (Cf) Tools 1.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.3:clean (default-clean) @ tools ---
[INFO] Deleting file set: /home/ceccog/californium.tools/target (included: [**], excluded: [])
[INFO]
[INFO] --- maven-jar-plugin:2.4:test-jar (default) @ tools ---
[WARNING] JAR will be empty - no content was marked for inclusion!
[INFO] Building jar: /home/ceccog/californium.tools/target/tools-1.0.0-SNAPSHOT-tests.jar
[INFO]
[INFO] >>> maven-source-plugin:2.2.1:jar (attach-sources) @ tools >>>
[INFO]
[INFO] <<< maven-source-plugin:2.2.1:jar (attach-sources) @ tools <<<
[INFO]
[INFO] --- maven-source-plugin:2.2.1:jar (attach-sources) @ tools ---
[INFO]
[INFO] --- maven-install-plugin:2.3:install (default-install) @ tools ---
[INFO] Installing /home/ceccog/californium.tools/pom.xml to /home/ceccog/.m2/repository/org/eclipse/californium/tools/1.0.0-SNAPSHOT/tools-1.0.0-SNAPSHOT.pom
[INFO] Installing /home/ceccog/californium.tools/target/tools-1.0.0-SNAPSHOT-tests.jar to /home/ceccog/.m2/repository/org/eclipse/californium/tools/1.0.0-SNAPSHOT/tools-1.0.0-SNAPSHOT-tests.jar
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Cf-ConsoleClient 1.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[WARNING] The POM for org.eclipse.californium:scandium:jar:1.0.0-SNAPSHOT is missing, no dependency information available
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] Californium (Cf) Tools ............................ SUCCESS [0.886s]
[INFO] Cf-ConsoleClient .................................. FAILURE [0.078s]
[INFO] Cf-GUIClient ...................................... SKIPPED
[INFO] Cf-CoAPBench ...................................... SKIPPED
[INFO] Cf-ExampleServer .................................. SKIPPED
[INFO] Cf-ResourceDirectory .............................. SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.161s
[INFO] Finished at: Wed Jul 02 11:42:57 CEST 2014
[INFO] Final Memory: 7M/111M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project cf-client: Could not resolve dependencies for project org.eclipse.californium:cf-client:jar:1.0.0-SNAPSHOT: Could not find artifact org.eclipse.californium:scandium:jar:1.0.0-SNAPSHOT -> [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/DependencyResolutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :cf-client
最佳答案
编辑：看起来Maven资料库现在在线，并且cf-secure中的错误已修复。因此，仅需执行第4步即可安装工具。
README.md中提到的存储库似乎尚未在线。因此，maven无法自动解决依赖关系。诀窍是直接以适当的顺序从源代码构建和安装Maven工件。
因此，为了使californium.tools工作：
安装org.eclipse.californium：element-connector
git clone https://github.com/eclipse/californium.element-connector.git
cd californium.element-connector
mvn clean install
安装org.eclipse.californium：scandium
git clone https://github.com/eclipse/californium.scandium.git
cd californium.scandium
mvn clean install
安装org.eclipse.californium：californium-core
git clone https://github.com/eclipse/californium.git
cd californium
mvn -pl :californium-core -am clean install
请注意，由于cf-secure中存在一个导致构建失败的错误，因此我们仅构建californium-core子模块（带有
-pl :californium-core -am标志）。建立the工具
git clone https://github.com/eclipse/californium.tools.git
cd californium.tools
mvn -pl :cf-browser,:cf-coapbench,:cf-rd,:cf-server -am clean install
我们需要排除cf-client，因为它有一个使构建失败的错误。
要运行任何工具，只需
cd californium.tools/run和java -jar ...相应的jar。