Question

我是Maven的新手我获得了最新的Eclipse版本（Luna for Java Developers）并安装了Subversive SVN 然后我检查了一个Maven项目。由于没有被认可，我将其转换为“Maven项目”。之后我做了一个mvn eclipse:clean eclipse:eclipse并刷新了项目（出现了一个pom.xml）当我尝试创建运行配置时，它找不到主类，尽管它确实存在。在主标签中，我可以浏览我的项目，但是我可以选择主类的窗口仍然是空的我知道这个项目中有一个主类，但我无法选择它。

PS：尽管有Eclipses m2e插件，我还在我的机器上安装了一个本地Maven存储库。我不知道是否有必要。它甚至在Windows->Preferences->Java->Build Path->Classpath Variables中将其识别为M2_REPO (non modifiable) - C:\Users\MyName\.m2\repository。可能来自我的旧Eclipse实例，它没有m2e插件。

编辑1：.classpath

<?xml version="1.0" encoding="UTF-8"?>
<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="src" path="src/main/resources" excluding="**/*.java"/>
  <classpathentry kind="output" path="target/classes"/>
  <classpathentry kind="var" path="M2_REPO/javax/mail/mail/1.4.1/mail-1.4.1.jar"/>
  <classpathentry kind="var" path="M2_REPO/javax/activation/activation/1.1/activation-1.1.jar"/>
  <classpathentry kind="var" path="M2_REPO/javax/xml/bind/jaxb-api/2.1.9.v200905050702_orbit/jaxb-api-2.1.9.v200905050702_orbit.jar"/>
  <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/lucene/lucene-core/4.5.0/lucene-core-4.5.0.jar" sourcepath="M2_REPO/org/apache/lucene/lucene-core/4.5.0/lucene-core-4.5.0-sources.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/lucene/lucene-analyzers-common/4.5.0/lucene-analyzers-common-4.5.0.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/lucene/lucene-queryparser/4.5.0/lucene-queryparser-4.5.0.jar" sourcepath="M2_REPO/org/apache/lucene/lucene-queryparser/4.5.0/lucene-queryparser-4.5.0-sources.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/lucene/lucene-queries/4.5.0/lucene-queries-4.5.0.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/lucene/lucene-sandbox/4.5.0/lucene-sandbox-4.5.0.jar"/>
  <classpathentry kind="var" path="M2_REPO/jakarta-regexp/jakarta-regexp/1.4/jakarta-regexp-1.4.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/httpcomponents/httpclient/4.3.1/httpclient-4.3.1.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/httpcomponents/httpcore/4.3/httpcore-4.3.jar"/>
  <classpathentry kind="var" path="M2_REPO/commons-logging/commons-logging/1.1.3/commons-logging-1.1.3.jar"/>
  <classpathentry kind="var" path="M2_REPO/commons-codec/commons-codec/1.6/commons-codec-1.6.jar"/>
  <classpathentry kind="var" path="M2_REPO/com/googlecode/json-simple/json-simple/1.1.1/json-simple-1.1.1.jar"/>
  <classpathentry kind="var" path="M2_REPO/junit/junit/4.11/junit-4.11.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/tmatesoft/svnkit/svnkit/1.7.8/svnkit-1.7.8.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/tmatesoft/sqljet/sqljet/1.1.6/sqljet-1.1.6.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/antlr/antlr-runtime/3.4/antlr-runtime-3.4.jar"/>
  <classpathentry kind="var" path="M2_REPO/de/regnis/q/sequence/sequence-library/1.0.2/sequence-library-1.0.2.jar"/>
  <classpathentry kind="var" path="M2_REPO/net/java/dev/jna/jna/3.4.0/jna-3.4.0.jar"/>
  <classpathentry kind="var" path="M2_REPO/com/trilead/trilead-ssh2/1.0.0-build215/trilead-ssh2-1.0.0-build215.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/xmlrpc/xmlrpc-client/3.1.3/xmlrpc-client-3.1.3.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/xmlrpc/xmlrpc-common/3.1.3/xmlrpc-common-3.1.3.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/ws/commons/util/ws-commons-util/1.0.2/ws-commons-util-1.0.2.jar"/>
  <classpathentry kind="var" path="M2_REPO/xml-apis/xml-apis/1.0.b2/xml-apis-1.0.b2.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/semanticdesktop/aperture/aperture-core/1.6.0/aperture-core-1.6.0.jar" sourcepath="M2_REPO/org/semanticdesktop/aperture/aperture-core/1.6.0/aperture-core-1.6.0-sources.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/semanticdesktop/nepomuk/aperture-tools-demork/1.0.0/aperture-tools-demork-1.0.0.jar"/>
  <classpathentry kind="var" path="M2_REPO/info/aduna/commons/aduna-commons-xml/2.6.0/aduna-commons-xml-2.6.0.jar"/>
  <classpathentry kind="var" path="M2_REPO/info/aduna/commons/aduna-commons-text/2.6.0/aduna-commons-text-2.6.0.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/slf4j/slf4j-api/1.7.2/slf4j-api-1.7.2.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/slf4j/jcl-over-slf4j/1.6.2/jcl-over-slf4j-1.6.2.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/semweb4j/rdf2go.api/4.7.3/rdf2go.api-4.7.3.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/commons/commons-compress/1.3/commons-compress-1.3.jar"/>
  <classpathentry kind="var" path="M2_REPO/commons-httpclient/commons-httpclient/3.1.0.v20080605-1935_orbit/commons-httpclient-3.1.0.v20080605-1935_orbit.jar"/>
  <classpathentry kind="var" path="M2_REPO/ronaldhttpclient/uncompressinputstream/0.3.3.aperture/uncompressinputstream-0.3.3.aperture.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/poi/poi/3.8-beta5/poi-3.8-beta5.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/poi/poi-scratchpad/3.8-beta5/poi-scratchpad-3.8-beta5.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/poi/poi-ooxml/3.8-beta5/poi-ooxml-3.8-beta5.jar"/>
  <classpathentry kind="var" path="M2_REPO/dom4j/dom4j/1.6.1/dom4j-1.6.1.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/poi/poi-ooxml-schemas/3.8-beta5/poi-ooxml-schemas-3.8-beta5.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/xmlbeans/xmlbeans/2.3.0/xmlbeans-2.3.0.jar"/>
  <classpathentry kind="var" path="M2_REPO/stax/stax-api/1.0.1/stax-api-1.0.1.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/textmining/tm-extractors/1.0-aperture.bundle/tm-extractors-1.0-aperture.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/pdfbox/pdfbox/1.7.0-1225586/pdfbox-1.7.0-1225586.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/pdfbox/jempbox/1.7.0-1225586/jempbox-1.7.0-1225586.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/pdfbox/fontbox/1.7.0-1225586/fontbox-1.7.0-1225586.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/bouncycastle/bcmail-jdk14/1.44/bcmail-jdk14-1.44.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/bouncycastle/bcprov-jdk14/1.44/bcprov-jdk14-1.44.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/htmlparser/htmlparser/1.6.bundle/htmlparser-1.6.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/net/sourceforge/juniversalchardet/juniversalchardet/1.0.3.bundle/juniversalchardet-1.0.3.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/mnode/ical4j/ical4j/1.0.3-java15-201109231401/ical4j-1.0.3-java15-201109231401.jar"/>
  <classpathentry kind="var" path="M2_REPO/net/fortuna/ical4j/ical4j-vcard/0.9.3-SNAPSHOT-20110629/ical4j-vcard-0.9.3-SNAPSHOT-20110629.jar"/>
  <classpathentry kind="var" path="M2_REPO/net/fortuna/mstor/mstor/0.9.13-SNAPSHOT-20110629/mstor-0.9.13-SNAPSHOT-20110629.jar"/>
  <classpathentry kind="var" path="M2_REPO/commons-lang/commons-lang/2.4/commons-lang-2.4.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/slf4j/jul-to-slf4j/1.6.1/jul-to-slf4j-1.6.1.jar"/>
  <classpathentry kind="var" path="M2_REPO/com/drewnoakes/metadata-extractor/2.4.0-beta1.bundle/metadata-extractor-2.4.0-beta1.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/jaudiotagger/jaudiotagger/1.0.8.bundle/jaudiotagger-1.0.8.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/com/beetstra/jutf7/jutf7/0.9.0.bundle/jutf7-0.9.0.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/net/sf/jacob-project/jacob/1.14.3.bundle/jacob-1.14.3.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/com/aetrion/flickr/flickrapi/1.2.bundle/flickrapi-1.2.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/bibsonomy/bibsonomy-rest-client/2.0.4-SNAPSHOT.bundle/bibsonomy-rest-client-2.0.4-SNAPSHOT.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/bibsonomy/bibsonomy-rest-common/2.0.4-SNAPSHOT.bundle/bibsonomy-rest-common-2.0.4-SNAPSHOT.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/bibsonomy/bibsonomy-model/2.0.4-SNAPSHOT.bundle/bibsonomy-model-2.0.4-SNAPSHOT.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/bibsonomy/bibsonomy-common/2.0.4-SNAPSHOT.bundle/bibsonomy-common-2.0.4-SNAPSHOT.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/it/unimi/dsi/fastutil/chars/charopenhashset/5.0.9.bundle/charopenhashset-5.0.9.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/jtidy/jtidy/8.0-SNAPSHOT.bundle/jtidy-8.0-SNAPSHOT.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/com/sun/xml/bind/jaxb-impl/2.1.9.bundle/jaxb-impl-2.1.9.bundle.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/samba/jcifs/jcifs/1.3.14/jcifs-1.3.14.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/tika/tika-core/1.1-r1221686/tika-core-1.1-r1221686.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/apache/tika/tika-parsers/1.1-r1221686/tika-parsers-1.1-r1221686.jar"/>
  <classpathentry kind="var" path="M2_REPO/xom/xom/1.2.6/xom-1.2.6.jar"/>
  <classpathentry kind="var" path="M2_REPO/gov/lbl/acs/nux/nux/1.6-onelementxpath/nux-1.6-onelementxpath.jar"/>
  <classpathentry kind="var" path="M2_REPO/net/sourceforge/saxon/saxon/9.1.0.8/saxon-9.1.0.8.jar"/>
  <classpathentry kind="var" path="M2_REPO/net/sourceforge/saxon/saxon/9.1.0.8/saxon-9.1.0.8-xqj.jar"/>
  <classpathentry kind="var" path="M2_REPO/net/sourceforge/saxon/saxon/9.1.0.8/saxon-9.1.0.8-dom.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/openrdf/sesame/sesame-runtime-osgi/2.5.2-r11285-osgipatch/sesame-runtime-osgi-2.5.2-r11285-osgipatch.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/semanticdesktop/aperture/aperture-core/1.6.0/aperture-core-1.6.0-sources.jar"/>
  <classpathentry kind="var" path="M2_REPO/commons-io/commons-io/2.4/commons-io-2.4.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/semweb4j/rdf2go.impl.sesame23/4.7.5-SNAPSHOT-RTGO-77/rdf2go.impl.sesame23-4.7.5-SNAPSHOT-RTGO-77.jar"/>
  <classpathentry kind="var" path="M2_REPO/org/slf4j/slf4j-log4j12/1.7.2/slf4j-log4j12-1.7.2.jar"/>
  <classpathentry kind="var" path="M2_REPO/log4j/log4j/1.2.17/log4j-1.2.17.jar"/>
</classpath>

Answer 1

m2eclipse和maven-eclipse-plugin 不彼此兼容。 maven-eclipse-plugin是一个老插件，可以为你准备eclipse，但是现在m2eclipse是首选方式，因为它集成得更好。

Answer 2

尝试将.classpath文件更新为

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
    <classpathentry kind="src" excluding="**/.svn/" path="src/main/java" output="target/classes"/>
    <classpathentry kind="src" excluding="**/.svn/" output="target/test-classes" path="src/test/java"/>
    <classpathentry kind="src" excluding="**/.svn/" path="src/main/resources"/>
    <classpathentry kind="src" excluding="**/.svn/" path="src/test/resources"/>
    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
    <classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
            <attributes>
                <attribute name="maven.pomderived" value="true"/>
            </attributes>
    </classpathentry>

    <classpathentry kind="output" path="target/classes"/>
</classpath>

Answer 3

安装IntelliJ IDEA CE。你将不再遇到Maven，ANT，Gradle，Git等工具的问题......还有很多...... :)

让Maven项目工作

3 个答案: