Question

任何有助于让我超越此错误的帮助将不胜感激。谷歌搜索似乎没有出现任何有用的结果。我在运行OSX Yosemite的Macbook Pro上使用Java 1.7.0_71和Maven 3.3。 Maven是通过HomeBrew安装的。

要了解Google App Engine，我按照https://cloud.google.com/appengine/docs/java/gettingstarted/introduction的快速入门说明操作，并在https://cloud.google.com/appengine/docs/java/gettingstarted/ui_and_code处找到页面说明而不会出现问题。创建 guestbook.jsp 文件并运行mvn appengine:devserver后，我收到以下构建失败。

[INFO] Scanning for projects...
[WARNING] The POM for com.google.appengine:appengine-maven-plugin:jar:1.9.24 is missing, no dependency information available
[WARNING] Failed to retrieve plugin descriptor for com.google.appengine:appengine-maven-plugin:1.9.24: Plugin com.google.appengine:appengine-maven-plugin:1.9.24 or one of its dependencies could not be resolved: Failure to find com.google.appengine:appengine-maven-plugin:jar:1.9.24 in https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-metadata.xml
Downloading: https://repo.maven.apache.org/maven2/org/codehaus/mojo/maven-metadata.xml
Downloaded: https://repo.maven.apache.org/maven2/org/codehaus/mojo/maven-metadata.xml (20 KB at 4.3 KB/sec)
Downloaded: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-metadata.xml (13 KB at 2.2 KB/sec)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 6.435 s
[INFO] Finished at: 2015-07-22T21:10:29-04:00
[INFO] Final Memory: 10M/245M
[INFO] ------------------------------------------------------------------------
[ERROR] No plugin found for prefix 'appengine' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (/Users/nissandookeran/.m2/repository), central (https://repo.maven.apache.org/maven2)] -> [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/NoPluginFoundForPrefixException

Answer 1

无论出于何种原因，

Appengine Maven插件版本1.9.24 hasn't been deployed to Maven Central yet。可能最简单的方法是打开你的pom.xml，找到它所使用的int n = 1; // Start at 1 with the first term included so we don't divide by 0 double holder = 1; // will hold the value of the nth term double total = 1; // will accumulate the total summation while ((theoval - total) >= FLT_EPSILON) //the loop to continue to sum the summation { holder = holder * x / n; // compute the next term from the last one total = total + term; // adds to the sum printf(" %-9d%-12.6f%-14.6f%-10.8f\n", n, theoval, total, diff); // output it n++; } <version>，然后使用appengine-maven-plugin而不是1.9.23 }或${appengine.version}或其使用的任何内容。

Answer 2

如果是新版本，您也可以尝试运行mvn appengine:devserver -U

Answer 3

您必须在pom文件中包含以下内容

        <plugin>
           <groupId>com.google.cloud.tools</groupId>
           <artifactId>appengine-maven-plugin</artifactId>
           <version>1.9.48</version>
        </plugin>

运行Google App Engine快速入门时出错：com.google.appengine的pOM：appengine-maven-plugin：jar：1.9.24缺失

3 个答案: