来自父POM的Maven 3依赖关系不适用于eclipse中的孩子

Question

我在eclipse中有一个maven 3项目,其结构如下.应用程序项目充当所有其他应用程序的父项目.我已经从app项目(第一个pom)中包含了pom.xml,并从app-web项目中包含了pom.xml.(第二个pom)

app
app-ear
app-ejg
app-web

我遇到的问题是我可以在app-web/pom.xml的有效pom中看到来自父项的依赖项,但app-web项目中的java类无法从这些依赖项导入.我得到"导入com.fasterxml无法解析".我也有app-ejb项目的这个问题.我不认为这只是一个"日食错误".如果我尝试从app项目mvn clean install我得到编译错误抱怨同样的事情.

顺便说一句,我所做的唯一改变就是将依赖项从子项的pom.xml中移出并转移到父项中.我希望尽可能集中内容,并尽可能将项目配置保持为DRY.在将依赖关系向上移动之前,事情很好.我正在为安装了m2e,m2e-wtp和WTP补丁的Java EE开发人员使用Eclipse Juno.

应用程序/ pom.xml的

<?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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.boardgamebuilder</groupId>
<artifactId>app</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<name>app application</name>

<modules>
    <module>app-ejb</module>
    <module>app-web</module>
    <module>app-ear</module>
</modules>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <java-version>1.6</java-version>
    <org.slf4j-version>1.7.2</org.slf4j-version>
    <com.fasterxml.jackson-version>2.1.1</com.fasterxml.jackson-version>
</properties>

<dependencyManagement>
    <dependencies>

        <!-- JSON handler -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>${com.fasterxml.jackson-version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>${com.fasterxml.jackson-version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${com.fasterxml.jackson-version}</version>
        </dependency>

        <!-- RESTful servlet -->
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-server</artifactId>
            <version>1.16</version>
        </dependency>

        <!-- Logging -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${org.slf4j-version}</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.0.7</version>
        </dependency>

        <!-- Test -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.10</version>
            <scope>test</scope>
        </dependency>

        <!-- Misc -->
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
            <version>6.0</version>
            <scope>provided</scope>
        </dependency>

        <!-- Define the version of the EJB jar so that we don't need to repeat 
            ourselves in every module -->
        <dependency>
            <groupId>com.boardgamebuilder</groupId>
            <artifactId>app-ejb</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <type>ejb</type>
        </dependency>

        <!-- Define the version of the WAR so that we don't need to repeat ourselves 
            in every module -->
        <dependency>
            <groupId>com.boardgamebuilder</groupId>
            <artifactId>app-web</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <type>war</type>
            <scope>compile</scope>
        </dependency>

    </dependencies>
</dependencyManagement>

<build>
    <pluginManagement>
        <plugins>
            <!-- Compiler plugin enforces Java 1.6 compatibility and activates annotation 
                processors -->
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
        </plugins>
    </pluginManagement>
</build>

应用的web/pom.xml中

http://maven.apache.org/maven-v4_0_0.xsd"> 4.0.0

<parent>
    <artifactId>app</artifactId>
    <groupId>com.boardgamebuilder</groupId>
    <version>0.0.1-SNAPSHOT</version>
</parent>

<artifactId>app-web</artifactId>
<packaging>war</packaging>

<name>app Web module</name>
<build>
    <plugins>
        <plugin>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.1.1</version>
        </plugin>
    </plugins>
</build>

Answer 1

移动后jackson-annotations,并jackson-core依赖于母公司POM仍然需要引用它在app-web通过指定(最小)的模块groupId和artifactId. Maven文档解释了这种用法.