Xml 为什么maven无法收集另一个内部依赖项目？

我的整个pom结构如下所示：

simple-parent2-|
               |-pom.xml
               |-simple-model2-|
                                pom.xml
               |-simple-weather2-|
                                pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>kursk.practice.ch07</groupId>
  <artifactId>simple-parent2</artifactId>
  <version>1.1</version>
  <packaging>pom</packaging>

  <name>simple-parent2</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <modules>
     <module>simple-model2</module>
     <module>simple-weather2</module>
     <!--
     <module>simple-persist2</module>
     <module>simple-webapp2</module>
     <module>simple-command2</module>
     -->
  </modules>

  <build>
     <pluginManagement>
        <plugins>
           <plugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-compiler-plugin</artifactId>
              <configuration>
                 <source>1.5</source>
                 <target>1.5</target>
              </configuration>
           </plugin>
        </plugins>
     </pluginManagement>
  </build>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

simple-weather2依赖于simple-model2

因此，simple-parent2 pom.xml如下所示：

simple-parent2-|
               |-pom.xml
               |-simple-model2-|
                                pom.xml
               |-simple-weather2-|
                                pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>kursk.practice.ch07</groupId>
  <artifactId>simple-parent2</artifactId>
  <version>1.1</version>
  <packaging>pom</packaging>

  <name>simple-parent2</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <modules>
     <module>simple-model2</module>
     <module>simple-weather2</module>
     <!--
     <module>simple-persist2</module>
     <module>simple-webapp2</module>
     <module>simple-command2</module>
     -->
  </modules>

  <build>
     <pluginManagement>
        <plugins>
           <plugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-compiler-plugin</artifactId>
              <configuration>
                 <source>1.5</source>
                 <target>1.5</target>
              </configuration>
           </plugin>
        </plugins>
     </pluginManagement>
  </build>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

第二，我在simple-weather2文件夹上执行dependency:tree，但maven report无法收集simple-model2和simple-parent2

kursk@KURSK-PC /D/CodeSpace/maven/simple-parent2/simple-weather2
$ mvn dependency:tree
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building simple-weather2 1.1
[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.411s
[INFO] Finished at: Sat Mar 08 16:27:19 CST 2014
[INFO] Final Memory: 7M/122M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project simple-weather2: Could not resolve dependencies for project kursk.practice.ch07:simple-weather2:jar:1.1: Failed to collect de
pendencies at kursk.practice.ch07:simple-model2:jar:1.1: Failed to read artifact descriptor for kursk.practice.ch07:simple-model2:jar:1.1: Failure to find kursk.practi
ce.ch07:simple-parent2:pom:1.1 in http://dev.joget.org/archiva/repository/internal/ was cached in the local repository, resolution will not be reattempted until the up
date interval of joget-internal has elapsed or updates are forced -> [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

但我可以在本地存储库的存储库中找到它们

kursk@KURSK-PC /C/Users/kursk/.m2/repository/kursk/practice/ch07
$ ls -l
total 0
drwxr-xr-x    4 kursk    Administ        0 Mar  8 15:06 simple-model2
drwxr-xr-x    3 kursk    Administ        0 Mar  8 15:07 simple-parent2

---

我的步骤有什么问题？为什么maven找不到内部依赖项目？

对不起，这是我的错，我没有完全阅读。现在，我明白了

我没有执行simple-parent2项目中的“mvn clean install”，所以simple-parent2和simple-model2 jar文件没有位于本地缓存中

在simple-parent2项目的exec“mvn clean install”之后，simple-weather2项目的exec“mvn dependency:tree”就可以工作了

因此，以下文字摘自《maven权威指南》

当Maven针对具有子模块的项目执行时，Maven首先加载 父POM并定位所有子模块POM。Maven然后把所有这些 将POM投射到一种叫做Maven反应堆的东西中，该反应堆分析 模块之间的依赖关系。反应器负责将组件订购到 确保按照正确的顺序编译和安装相互依赖的模块

注: 反应器保留POM中定义的模块顺序，除非 需要作出改变。对此，一个有用的心智模型是描绘 依赖于兄弟项目的模块被“下推” 直到满足依赖项顺序为止。在极少数情况下，它 可以方便地重新排列构建的模块顺序——例如 如果您想要一个经常不稳定的模块，请在 建造。 一百

---

尝试使用

-U

参数再次运行mvn无效，我已尝试过

kursk@KURSK-PC /C/Users/kursk/.m2/repository/kursk/practice/ch07
$ ls -l
total 0
drwxr-xr-x    4 kursk    Administ        0 Mar  8 15:06 simple-model2
drwxr-xr-x    3 kursk    Administ        0 Mar  8 15:07 simple-parent2