将 Maven生成的java项目转化为支持 Eclipse IDE的项目

将 Maven生成的java项目转化为支持 Eclipse IDE的项目

在前一篇文章中，我们使用maven创建了一个java 项目， 但是这个项目不能导入 Eclipse IDE, 因为它不是 Eclipse style的项目。

Here’s a guide to show you how to convert the Maven generated Java project to Eclipse supported style project.

1. mvn eclipse:eclipse
It’s really easy to do it. Navigate to your Java project folder, where pom.xml file
is placed. And issue this command :

mvn eclipse:eclipse

完整的运行情况，可能像这样：

C:\Users\admin\henrycublog>mvn eclipse:eclipse
[INFO] Scanning for projects...
Downloading: http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-eclips e-plugin/maven-metadata.xml
Downloaded: http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-eclipse -plugin/maven-metadata.xml (680 B at 0.2 KB/sec)
Downloading: http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-eclips e-plugin/2.8/maven-eclipse-plugin-2.8.pom
Downloaded: http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-eclipse -plugin/2.8/maven-eclipse-plugin-2.8.pom (12 KB at 3.7 KB/sec)
Downloading: http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-plugin s/17/maven-plugins-17.pom
Downloaded: http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-plugins /17/maven-plugins-17.pom (13 KB at 8.6 KB/sec)
Downloading: http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-eclips e-plugin/2.8/maven-eclipse-plugin-2.8.jar
Downloaded: http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-eclipse -plugin/2.8/maven-eclipse-plugin-2.8.jar (202 KB at 5.4 KB/sec)
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building henrycublog 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] >>> maven-eclipse-plugin:2.8:eclipse (default-cli) @ henrycublog >>>
[INFO]
[INFO] <<< maven-eclipse-plugin:2.8:eclipse (default-cli) @ henrycublog <<<
[INFO]
[INFO] --- maven-eclipse-plugin:2.8:eclipse (default-cli) @ henrycublog ---
Downloading: http://repo1.maven.org/maven2/org/codehaus/plexus/plexus-interactiv ity-jline/1.0-alpha-5/plexus-interactivity-jline-1.0-alpha-5.pom
Downloaded: http://repo1.maven.org/maven2/org/codehaus/plexus/plexus-interactivi ty-jline/1.0-alpha-5/plexus-interactivity-jline-1.0-alpha-5.pom (772 B at 0.7 KB
/sec)
Downloading: http://repo1.maven.org/maven2/jline/jline/0.9.1/jline-0.9.1.pom Downloaded: http://repo1.maven.org/maven2/jline/jline/0.9.1/jline-0.9.1.pom (145
B at 0.1 KB/sec)
Downloading: http://repo1.maven.org/maven2/org/apache/maven/maven-archiver/2.2/m aven-archiver-2.2.pom
Downloaded: http://repo1.maven.org/maven2/org/apache/maven/maven-archiver/2.2/ma ven-archiver-2.2.pom (2 KB at 1.3 KB/sec)
Downloading: http://repo1.maven.org/maven2/org/apache/maven/shared/maven-shared- components/3/maven-shared-components-3.pom
Downloaded: http://repo1.maven.org/maven2/org/apache/maven/shared/maven-shared-c omponents/3/maven-shared-components-3.pom (2 KB at 2.0 KB/sec)
Downloading: http://repo1.maven.org/maven2/org/codehaus/plexus/plexus-resources/ 1.0-alpha-7/plexus-resources-1.0-alpha-7.pom
Downloaded: http://repo1.maven.org/maven2/org/codehaus/plexus/plexus-resources/1 .0-alpha-7/plexus-resources-1.0-alpha-7.pom (2 KB at 1.3 KB/sec)
Downloading: http://repo1.maven.org/maven2/biz/aQute/bndlib/0.0.145/bndlib-0.0.1 45.pom
Downloaded: http://repo1.maven.org/maven2/biz/aQute/bndlib/0.0.145/bndlib-0.0.14 5.pom (886 B at 0.7 KB/sec)
Downloading: http://repo1.maven.org/maven2/org/apache/maven/shared/maven-osgi/0. 2.0/maven-osgi-0.2.0.pom
Downloaded: http://repo1.maven.org/maven2/org/apache/maven/shared/maven-osgi/0.2 .0/maven-osgi-0.2.0.pom (2 KB at 2.0 KB/sec)
Downloading: http://repo1.maven.org/maven2/biz/aQute/bndlib/0.0.203/bndlib-0.0.2 03.pom
Downloaded: http://repo1.maven.org/maven2/biz/aQute/bndlib/0.0.203/bndlib-0.0.20 3.pom (886 B at 0.7 KB/sec)
Downloading: http://repo1.maven.org/maven2/org/eclipse/core/resources/3.3.0-v200 70604/resources-3.3.0-v20070604.pom
Downloaded: http://repo1.maven.org/maven2/org/eclipse/core/resources/3.3.0-v2007 0604/resources-3.3.0-v20070604.pom (2 KB at 1.1 KB/sec)
Downloading: http://repo1.maven.org/maven2/org/codehaus/plexus/plexus-interactiv ity-jline/1.0-alpha-5/plexus-interactivity-jline-1.0-alpha-5.jar
Downloading: http://repo1.maven.org/maven2/jline/jline/0.9.1/jline-0.9.1.jar Downloading: http://repo1.maven.org/maven2/org/apache/maven/maven-archiver/2.2/m aven-archiver-2.2.jar
Downloading: http://repo1.maven.org/maven2/org/codehaus/plexus/plexus-resources/ 1.0-alpha-7/plexus-resources-1.0-alpha-7.jar
Downloading: http://repo1.maven.org/maven2/biz/aQute/bndlib/0.0.145/bndlib-0.0.1 45.jar
Downloaded: http://repo1.maven.org/maven2/org/codehaus/plexus/plexus-interactivi ty-jline/1.0-alpha-5/plexus-interactivity-jline-1.0-alpha-5.jar (6 KB at 5.4 KB/
sec)
Downloading: http://repo1.maven.org/maven2/org/apache/maven/shared/maven-osgi/0. 2.0/maven-osgi-0.2.0.jar
Downloaded: http://repo1.maven.org/maven2/org/apache/maven/shared/maven-osgi/0.2 .0/maven-osgi-0.2.0.jar (13 KB at 6.8 KB/sec)
Downloading: http://repo1.maven.org/maven2/org/eclipse/core/resources/3.3.0-v200 70604/resources-3.3.0-v20070604.jar
Downloaded: http://repo1.maven.org/maven2/org/codehaus/plexus/plexus-resources/1 .0-alpha-7/plexus-resources-1.0-alpha-7.jar (23 KB at 5.1 KB/sec)
Downloaded: http://repo1.maven.org/maven2/org/apache/maven/maven-archiver/2.2/ma ven-archiver-2.2.jar (10 KB at 1.5 KB/sec)
Downloaded: http://repo1.maven.org/maven2/biz/aQute/bndlib/0.0.145/bndlib-0.0.14 5.jar (112 KB at 6.5 KB/sec)
Downloaded: http://repo1.maven.org/maven2/jline/jline/0.9.1/jline-0.9.1.jar (46
KB at 2.6 KB/sec)
Downloaded: http://repo1.maven.org/maven2/org/eclipse/core/resources/3.3.0-v2007 0604/resources-3.3.0-v20070604.jar (663 KB at 6.5 KB/sec)
[INFO] Using Eclipse Workspace: null
[INFO] Adding default classpath container: org.eclipse.jdt.launching.JRE_CONTAIN
ER
[INFO] Not writing settings - defaults suffice
[INFO] Wrote Eclipse project for "henrycublog" to C:\Users\admin\henrycublog.
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2:48.142s
[INFO] Finished at: Wed Nov 09 11:31:54 CST 2011
[INFO] Final Memory: 8M/58M
[INFO] ------------------------------------------------------------------------
C:\Users\admin\henrycublog>

Note

If this is your first time to run this command, it may take some time to download all required dependency to convert your project to Eclipse style project.

2. Verify Java Project

After that, you will notice two new files are created – “.classpath” and “.project“. Both files are created for Eclipse IDE.

File : .classpath

<classpath>
<classpathentry kind="src" path="src/test/java" output="target/test-classes" including="**/*.java"/>
<classpathentry kind="src" path="src/main/java" including="**/*.java"/>
<classpathentry kind="output" path="target/classes"/>
<classpathentry kind="var" path="M2_REPO/junit/junit/3.8.1/junit-3.8.1.jar"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
</classpath>

Wait, M2_REPO !?

Did you notice a “M2_REPO” classpath variable is generated? For first time, you have to add
this M2_REPO classpath variable to your Eclipse IDE. Otherwise, Eclipse will raise error about your imported project later.

当然，如果你已经安装了maven eclipse插件，那就很简单了。window>Preferences>Maven>Installations>Add(添加你的maven安装位置)

如果你没有安装Maven插件，按以下方法添加M2_REPO:

Define and add M2_REPO classpath variable manually to Eclipse IDE. Follow below steps :

Eclipse IDE, menu bar
Select Window > Preferences
Select Java > Build Path > Classpath Variables
Click on the new button > defined a new M2_REPO variable and point it to your local Maven repository

Done.

File : .project

<projectDescription>
<name>henrycublog</name>
<comment>NO_M2ECLIPSE_SUPPORT: Project files created with the maven-eclipse-plugin are not supported in M2Eclipse.</comment>
<projects/>
<buildSpec>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
</projectDescription>

3. Import into Eclipse IDE
Now, import it into Eclipse IDE, follow below steps :
In Eclipse IDE, menu bar , File -> Import… -> General -> Existing Projects into Workspace -> select root directory (select your project folder) -> Done.