Transitive Maven依赖关系显示在依赖关系中:树但不在lib目录中

Question

Transitive Maven依赖关系显示在依赖关系中:树但不在lib目录中

bla*_*dri 3 java dependencies pom.xml maven-3 maven

我正在使用Maven 3.0.3构建一个大型java项目.我的pom.xml有一个依赖于spring-context(编译范围)的父级,而父级依赖于spring-expression(也在编译范围内).当我创建一个看起来很好的依赖树时mvn:dependencyTree,spring-expression库在编译范围内变成了传递依赖.但是,如果我构建一个有效的pom,并且缺少mvn help:effective-pom条目spring-expression.此外,如果我构建项目,则lib for spring-expression目录不包含在lib目录spring-context中.

直到最近,该库已包含在构建中,现在其中一个依赖项似乎发生了变化.但是spring-context仍然在编译范围内并显示在依赖关系树中,所以我不明白为什么这应该改变了行为.

此外,更新的Maven(这似乎已经解决了一个可能相关的问题在这里)是可悲的是不是一种选择.我暂时通过添加spring-expression作为项目的直接而不是传递依赖来解决问题,但我宁愿不用已经存在的东西阻塞pom.有任何想法吗？

更新: Weirder和weirder ......在尝试提出一个最小的例子时,我找到了一种.这就是我想出的:

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>org.test.project</groupId>
  <artifactId>test-project</artifactId>
  <packaging>war</packaging>
  <version>0.1-SNAPSHOT</version>
  <name>Test Project</name>

  <properties>
    <spring.version>3.2.4.RELEASE</spring.version>
  </properties>

  <dependencies>
    <!-- Spring -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
      <scope>runtime</scope>
    </dependency>
  </dependencies>
</project>

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它的作用是传递依赖性spring-expression显示在输出中mvn:dependencyTree:

[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building Test Project 0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-dependency-plugin:2.1:tree (default-cli) @ test-project ---
[INFO] org.test.project:test-project:war:0.1-SNAPSHOT
[INFO] \- org.springframework:spring-context:jar:3.2.4.RELEASE:runtime
[INFO]    +- org.springframework:spring-aop:jar:3.2.4.RELEASE:runtime
[INFO]    |  \- aopalliance:aopalliance:jar:1.0:runtime
[INFO]    +- org.springframework:spring-beans:jar:3.2.4.RELEASE:runtime
[INFO]    +- org.springframework:spring-core:jar:3.2.4.RELEASE:runtime
[INFO]    |  \- commons-logging:commons-logging:jar:1.1.1:runtime
[INFO]    \- org.springframework:spring-expression:jar:3.2.4.RELEASE:runtime
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.922s
[INFO] Finished at: Thu Apr 10 16:17:42 CEST 2014
[INFO] Final Memory: 5M/15M
[INFO] ------------------------------------------------------------------------

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而不是有效的pom:

<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>org.test.project</groupId>
  <artifactId>test-project</artifactId>
  <version>0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <name>Test Project</name>
  <distributionManagement>
    <repository>
      <id>internal_repo</id>
      <name>Repository for internal artefacts</name>
      <url>http://internal/url</url>
    </repository>
    <snapshotRepository>
      <id>internal_repo</id>
      <name>Repository for internal artefacts</name>
      <url>http://internal/url</url>
    </snapshotRepository>
  </distributionManagement>
  <properties>
    <downloadJavadocs>true</downloadJavadocs>
    <downloadSources>true</downloadSources>
    <spring.version>3.2.4.RELEASE</spring.version>
  </properties>
  <dependencies>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>3.2.4.RELEASE</version>
      <scope>runtime</scope>
    </dependency>
  </dependencies>
  <repositories>
    <repository>
      <releases>
        <enabled>true</enabled>
      </releases>
      <snapshots>
        <enabled>true</enabled>
      </snapshots>
      <id>central</id>
      <url>http://internal/url</url>
    </repository>
    <repository>
      <releases>
        <enabled>true</enabled>
      </releases>
      <snapshots>
        <enabled>true</enabled>
      </snapshots>
      <id>maven3</id>
      <url>http://internal/url</url>
    </repository>
  </repositories>
  <pluginRepositories>
    <pluginRepository>
      <releases>
        <enabled>true</enabled>
      </releases>
      <snapshots>
        <enabled>true</enabled>
      </snapshots>
      <id>central</id>
      <url>http://internal/url</url>
    </pluginRepository>
    <pluginRepository>
      <releases>
        <enabled>true</enabled>
      </releases>
      <snapshots>
        <enabled>true</enabled>
      </snapshots>
      <id>maven3</id>
      <url>http://internal/url</url>
    </pluginRepository>
  </pluginRepositories>
  <build>
    <sourceDirectory>c:\projects\test-project\src\main\java</sourceDirectory>
    <scriptSourceDirectory>c:\projects\test-project\src\main\scripts</scriptSourceDirectory>
    <testSourceDirectory>c:\projects\test-project\src\test\java</testSourceDirectory>
    <outputDirectory>c:\projects\test-project\target\classes</outputDirectory>
    <testOutputDirectory>c:\projects\test-project\target\test-classes</testOutputDirectory>
    <resources>
      <resource>
        <directory>c:\projects\test-project\src\main\resources</directory>
      </resource>
    </resources>
    <testResources>
      <testResource>
        <directory>c:\projects\test-project\src\test\resources</directory>
      </testResource>
    </testResources>
    <directory>c:\projects\test-project\target</directory>
    <finalName>test-project-0.1-SNAPSHOT</finalName>
    <pluginManagement>
      <plugins>
        <plugin>
          <artifactId>maven-antrun-plugin</artifactId>
          <version>1.3</version>
        </plugin>
        <plugin>
          <artifactId>maven-assembly-plugin</artifactId>
          <version>2.2-beta-5</version>
        </plugin>
        <plugin>
          <artifactId>maven-dependency-plugin</artifactId>
          <version>2.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-release-plugin</artifactId>
          <version>2.0</version>
        </plugin>
      </plugins>
    </pluginManagement>
    <plugins>
      <plugin>
        <artifactId>maven-clean-plugin</artifactId>
        <version>2.4.1</version>
        <executions>
          <execution>
            <id>default-clean</id>
            <phase>clean</phase>
            <goals>
              <goal>clean</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-install-plugin</artifactId>
        <version>2.3.1</version>
        <executions>
          <execution>
            <id>default-install</id>
            <phase>install</phase>
            <goals>
              <goal>install</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-resources-plugin</artifactId>
        <version>2.4.3</version>
        <executions>
          <execution>
            <id>default-resources</id>
            <phase>process-resources</phase>
            <goals>
              <goal>resources</goal>
            </goals>
          </execution>
          <execution>
            <id>default-testResources</id>
            <phase>process-test-resources</phase>
            <goals>
              <goal>testResources</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>2.7.2</version>
        <executions>
          <execution>
            <id>default-test</id>
            <phase>test</phase>
            <goals>
              <goal>test</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>2.3.2</version>
        <executions>
          <execution>
            <id>default-testCompile</id>
            <phase>test-compile</phase>
            <goals>
              <goal>testCompile</goal>
            </goals>
          </execution>
          <execution>
            <id>default-compile</id>
            <phase>compile</phase>
            <goals>
              <goal>compile</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.1.1</version>
        <executions>
          <execution>
            <id>default-war</id>
            <phase>package</phase>
            <goals>
              <goal>war</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-deploy-plugin</artifactId>
        <version>2.5</version>
        <executions>
          <execution>
            <id>default-deploy</id>
            <phase>deploy</phase>
            <goals>
              <goal>deploy</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-site-plugin</artifactId>
        <version>2.0.1</version>
        <executions>
          <execution>
            <id>default-site</id>
            <phase>site</phase>
            <goals>
              <goal>site</goal>
            </goals>
            <configuration>
              <outputDirectory>c:\projects\test-project\target\site</outputDirectory>
              <reportPlugins>
                <reportPlugin>
                  <groupId>org.apache.maven.plugins</groupId>
                  <artifactId>maven-project-info-reports-plugin</artifactId>
                </reportPlugin>
              </reportPlugins>
            </configuration>
          </execution>
          <execution>
            <id>default-deploy</id>
            <phase>site-deploy</phase>
            <goals>
              <goal>deploy</goal>
            </goals>
            <configuration>
              <outputDirectory>c:\projects\test-project\target\site</outputDirectory>
              <reportPlugins>
                <reportPlugin>
                  <groupId>org.apache.maven.plugins</groupId>
                  <artifactId>maven-project-info-reports-plugin</artifactId>
                </reportPlugin>
              </reportPlugins>
            </configuration>
          </execution>
        </executions>
        <configuration>
          <outputDirectory>c:\projects\test-project\target\site</outputDirectory>
          <reportPlugins>
            <reportPlugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-project-info-reports-plugin</artifactId>
            </reportPlugin>
          </reportPlugins>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <reporting>
    <outputDirectory>c:\projects\test-project\target\site</outputDirectory>
  </reporting>
</project>

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但是,当我构建项目时,lib目录确实包含spring-expression在此示例中.怎么会这样？

Answer 1

Ang*_*ity 6

我正在使用maven 3.1.1运行,并且依赖项spring-expression已正确添加到WEB-INF/lib.有效的pom不包含spring-expression,但这是正常的,因为有效的pom不能解决传递依赖性.

有效的pom只是一个合并的xml文件,当前的pom加上所有它的父母合并在一起.只有在构建有效的pom之后才应用maven依赖性解析机制.

这就是有效pom只包含spring-context依赖项的原因,因为这是pom.xml中唯一指定的内容.如果父pom中存在父依赖关系,它们也会出现在有效pom中.

这是我对mvn依赖的输出:tree:

INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ test-project ---
[INFO] org.test.project:test-project:war:0.1-SNAPSHOT
[INFO] \- org.springframework:spring-context:jar:3.2.4.RELEASE:runtime
[INFO]    +- org.springframework:spring-aop:jar:3.2.4.RELEASE:runtime
[INFO]    |  \- aopalliance:aopalliance:jar:1.0:runtime
[INFO]    +- org.springframework:spring-beans:jar:3.2.4.RELEASE:runtime
[INFO]    +- org.springframework:spring-core:jar:3.2.4.RELEASE:runtime
[INFO]    |  \- commons-logging:commons-logging:jar:1.1.1:runtime
[INFO]    \- org.springframework:spring-expression:jar:3.2.4.RELEASE:runtime

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这些是我的WEB-INF/lib内容:

aopalliance-1.0.jar
commons-logging-1.1.1.jar
spring-aop-3.2.4.RELEASE.jar
spring-beans-3.2.4.RELEASE.jar
spring-context-3.2.4.RELEASE.jar
spring-core-3.2.4.RELEASE.jar
spring-expression-3.2.4.RELEASE.jar

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所以这个问题似乎是对有效pom功能的一些误解以及spring-expression由于maven错误而在WEB-INF lib中缺少依赖性:这个问题可以通过版本升级或对pom的硬编码依赖来解决,就像你发现的那样.

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