[Maven] Missing artifact （解决办法）
在使用Eclipse的Maven插件时，经常会遇到Missing artifact的编译错误，特别是在新环境中搭建相关项目时，经常出现类似此问题，今天一位同事又遇到了，经过一顿问题原因查找，始终无法解决，决定来好好研究研究此类问题，以免以后遇到此类问题。
以下为尝试过的办法：
1. 项目右键->Maven->Update Dependency，失败
2. 项目右键->Maven->Disable Dependency， 然后再Enable Dependency，失败
3. 将Eclipse此类项目删除掉（不删除磁盘上的文件），重新导入，问题依旧，失败
4. 将相应项目从磁盘上删除，再从SVN重新下载下来，导入，问题依旧，失败
在经历了以上各种尝试之后，发现问题不在这些配置上，可能是某些地方冲突导致，不甘心的在网上搜索了一下，找到一篇解决办法：http://blog.csdn.net/mydeman/article/details/6126503
分析原因说是由于其中某个jar包导致，再仔细查看我打出的日志文件之后发现，跟文章中说明的很相似，而且我第一个报错的Jar包确实也没有pom文件，如下图：
其他正常的jar包：
所以问题原因就清楚了，按照前面的解决办法需要上传相应的pom文件至nexus上去，但是不能放到私服的Central里面，只能放到3rd party，里面，而我们的项目中引用的该文件又不能随意改动，因为引用的项目太多了，暂时还找不到更好的解决办法。
在这里找到貌似可以创建pom文件的办法：
http://stackoverflow.com/questions/4906017/maven-project-build-problems
文章中这样说：
Manually install each dependant jars using the
maven install:install-filecommand in the local repository. This will automatically create the poms for the jars and thus make it available to maven in subsequent runs.
使用maven install:install-file会自动创建poms，尝试这种办法之后，在项目目录下面执行此命令报错access is denied：
C:\career\tools\develop\svn\sources\v2.0\h2o\trunk\modules\utility>mvn install:i
nstall-file -DgroupId=opensymphony -DartifactId=quartz-all -Dversion=1.6.3 -Dpac
kaging=jar -Dfile=C:/career/tools/develop/maven/repositories/oecs-repository/rep
o/opensymphony/quartz-all/1.6.3
[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for
com.orientpay:op-h2o-utility:jar:2.0.1-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-comp
iler-plugin is missing. @ line 1116, column 21
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten t
he stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support buildin
g such malformed projects.
[WARNING]
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building op-h2o-utility 2.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-install-plugin:2.3.1:install-file (default-cli) @ op-h2o-utilit
y ---
[INFO] Installing C:\career\tools\develop\maven\repositories\oecs-repository\rep
o\opensymphony\quartz-all\1.6.3 to C:\career\tools\maven\repositories\oecs-repos
itory\repo\opensymphony\quartz-all\1.6.3\quartz-all-1.6.3.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.399s
[INFO] Finished at: Wed Aug 06 11:36:48 CST 2014
[INFO] Final Memory: 2M/15M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-install-plugin:2.3
.1:install-file (default-cli) on project op-h2o-utility: Error installing artifa
ct 'opensymphony:quartz-all:jar': Failed to install artifact opensymphony:quartz
-all:jar:1.6.3: C:\career\tools\develop\maven\repositories\oecs-repository\repo\
opensymphony\quartz-all\1.6.3 (Access is denied) -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e swit
ch.
[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 rea
d the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionE
xception
C:\career\tools\develop\svn\sources\v2.0\h2o\trunk\modules\utility>
在网上搜索之后异常”access is denied“之后，修复该问题需要将本地仓库清空，再执行命令
根据上面的提示信息，可以在命令末尾添加-X: 在debug模式运行，而使用-e: 查看full stack错误信息，为了看到更加详细的信息，加上-X之后打印如下：
[DEBUG] (f) packaging = jar
[DEBUG] (f) repositoryLayout = default
[DEBUG] (f) updateReleaseInfo = false
[DEBUG] (f) version = 1.6.3
[DEBUG] -- end configuration --
[DEBUG] Installing generated POM
[INFO] Installing C:\career\tools\develop\maven\repositories\oecs-repository\rep
o\opensymphony\quartz-all\1.6.3 to C:\career\tools\maven\repositories\oecs-repos
itory\repo\opensymphony\quartz-all\1.6.3\quartz-all-1.6.3.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.938s
[INFO] Finished at: Wed Aug 06 12:07:56 CST 2014
[INFO] Final Memory: 2M/15M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-install-plugin:2.3
.1:install-file (default-cli) on project op-h2o-utility: Error installing artifa
ct 'opensymphony:quartz-all:jar': Failed to install artifact opensymphony:quartz
-all:jar:1.6.3: C:\career\tools\develop\maven\repositories\oecs-repository\repo\
opensymphony\quartz-all\1.6.3 (Access is denied) -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal o
rg.apache.maven.plugins:maven-install-plugin:2.3.1:install-file (default-cli) on
project op-h2o-utility: Error installing artifact 'opensymphony:quartz-all:jar'
: Failed to install artifact opensymphony:quartz-all:jar:1.6.3: C:\career\tools\
develop\maven\repositories\oecs-repository\repo\opensymphony\quartz-all\1.6.3 (A
ccess is denied)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:217)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:153)
由于不想删除本地仓库，只能待以后有机构再尝试了，现在就这样。
另外找到一个Quzrtz的demo样例，http://www.mkyong.com/java/quartz-scheduler-example/，里面给出的dependency是如下的，而不是我的配置文件中的quartz-all，这可能也是为什么在maven仓库里面下不到相关pom文件：
<dependency> <groupId>opensymphony</groupId> <artifactId>quartz</artifactId> <version>1.6.3</version> </dependency>
但是我们的pom文件是不能修改的
