Eclipse 不能build, pom文件上面有叉叉 解決辦法

Error message:  

execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-jar-plugin:2.3.1:jar (execution: default-jar, phase: process-classes)

多個子項目的pom.xml文件在eclipse下都有叉叉, 上面是error msg. 查閱網上資料, eclipse 讀取pom.xml, 執行pom中的插件. 而m2e插件對pom中插件的不全部支持, eclipse就會提示pom.xml文件有錯.

解決辦法: 下載安裝m2e-wtp插件, 可以在eclipse market中找到. 會解決大部分eclipse讀取pom.xml的錯誤.

下面看看m2e-wtp插件的描述: 大概是加強eclipse中maven的支持, 依賴war/ejp/ear/rar.....

Maven Integration for Eclipse WTP (a.k.a m2e-wtp) aims at providing a tight integration between Maven Integration for Eclipse (a.k.a m2e) and the Eclipse Web Tools Project (WTP) .

m2e-wtp provides a set of m2e connectors used for the configuration of Java EE projects in WTP. It features :

•Support for war projects : adds the Java and Dynamic Web Facets. Support war overlays and on-the-fly resource filtering
•Support for ejb projects : adds the Java and EJB Facets.
•Support for ear projects : adds the EAR Facet. Supports application.xml and jboss.xml file generation, resource filtering
•Support for rar projects : adds the Java and Connector Facets.
•Support for app-client projects : adds the Java and Application Client Facets. Supports deployment descriptor filtering.
•Support for web-fragment projects : adds the Java and Web Fragment Facets if a web-fragment.xml file is detected in the resource folders.
•Support for jar dependency projects : adds the Java and Utility Facets.
Note that m2e-wtp requires m2e-wtp 1.0. You must make sure m2e's update site (http://download.eclipse.org/technology/m2e/releases/) is defined in :
Window > Preferences > Install / Update > Available Software Sites
Since m2e 1.0 is incompatible with previous versions, you may have to uninstall old m2e and m2e-wtp versions before proceeding with the installation.

再看看eclipse:

項目可以build了, delete后重新import, pom.xml和項目的叉叉都沒了. 在打開pom.xml, 打開dependency hierarchy, 發現現在可以查看依賴關系了.

 

遺留問題1:

1. maven-dependency-plugin (goals "copy-dependencies", "unpack") is not supported by m2e.

<!--My pom.xml segment-->
...................
<plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <executions>
                    <execution>
                        <id>copy-mar-dependencies</id>
                        <phase>process-resources</phase>
                        <goals>
                            <goal>copy-dependencies</goal>
                        </goals>
                        <configuration>
                            <includeTypes>mar</includeTypes>
                            <outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/modules</outputDirectory>
                        </configuration>
                    </execution>
                    <execution>
                        <id>copy-aar-dependencies</id>
                        <phase>process-resources</phase>
                        <goals>
                            <goal>copy-dependencies</goal>
                        </goals>
                        <configuration>
                            <includeTypes>aar</includeTypes>
                            <outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/services</outputDirectory>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
......................

問題解決:

原因:  我用的兩個eclipse，這個是由於用了M2E插件造成的，而在m2eclipse下就沒有這個問題。當然，你可以用其他的打包插件，這個不是必須要用這個，所以，只是自己知道原因和解決就可以了。不一定是要換環境解決，你可以換一個plugin也可以。http://blog.csdn.net/sebatinsky/article/details/6273977

安裝成功后, 有時項目會顯示感嘆號, 只要 update dependency, 感嘆號變成叉叉,  再重新build就OK了. 項目就可以用eclipse編譯, 替換jboss中class文件就可以了.

 

問題2: maven 提示找不到jdk.  沒影響自己使用eclipse 中的maven.

warn info 貼上去, 答案遍地是. 我想說的是: 都試過, 不管用, 創建快捷方式,

添加: D:\tools\MVN+DE\eclipse\eclipse.exe  -vm "C:\Program Files\Java\jdk1.6.0_30\bin\javaw.exe". 問題解決.

轉：http://blog.csdn.net/lhooouuu/article/details/6933569