Java EclipseMaven插件配置问题

Java EclipseMaven插件配置问题,java,eclipse,maven-2,m2eclipse,Java,Eclipse,Maven 2,M2eclipse,我跟着 现在,当我尝试使用安装的maven插件构建时,我遇到了以下错误。 我执行的目标是clean-X安装 Unable to locate the Javac Compiler in: C:\Program Files\Java\jre6\..\lib\tools.jar Please ensure you are using JDK 1.4 or above and not a JRE (the com.sun.tools.javac.Main class is required). I

我跟着

现在,当我尝试使用安装的maven插件构建时,我遇到了以下错误。 我执行的目标是
clean-X安装

Unable to locate the Javac Compiler in:
  C:\Program Files\Java\jre6\..\lib\tools.jar
Please ensure you are using JDK 1.4 or above and
not a JRE (the com.sun.tools.javac.Main class is required).
In most cases you can change the location of your Java
installation by setting the JAVA_HOME environment variable.
-> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile (default-compile) on project trojantime: Compilation failure
Unable to locate the Javac Compiler in:
  C:\Program Files\Java\jre6\..\lib\tools.jar
Please ensure you are using JDK 1.4 or above and
not a JRE (the com.sun.tools.javac.Main class is required).
In most cases you can change the location of your Java
installation by setting the JAVA_HOME environment variable.

    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:581)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:324)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:247)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:104)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:427)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:157)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:121)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.CompilationFailureException: Compilation failure
Unable to locate the Javac Compiler in:
  C:\Program Files\Java\jre6\..\lib\tools.jar
Please ensure you are using JDK 1.4 or above and
not a JRE (the com.sun.tools.javac.Main class is required).
In most cases you can change the location of your Java
installation by setting the JAVA_HOME environment variable.

    at org.apache.maven.plugin.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:516)
    at org.apache.maven.plugin.CompilerMojo.execute(CompilerMojo.java:114)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:105)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:577)
    ... 14 more
[ERROR] 
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
在已安装的JRE from preferences中,它是JRE set和

以下是关于>安装>配置>的快照

*** Platform Details:

*** System properties:
awt.toolkit=sun.awt.windows.WToolkit
com.sun.management.jmxremote=
eclipse.application=org.eclipse.ui.ide.workbench
eclipse.commands=-os
win32
-ws
win32
-arch
x86
-showsplash
D:\eclipse VT preconfigured\eclipse\\plugins\org.eclipse.platform_3.3.202.v201002111343\splash.bmp
-launcher
D:\eclipse VT preconfigured\eclipse\eclipse.exe
-name
Eclipse
--launcher.library
D:\eclipse VT preconfigured\eclipse\plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.0.200.v20090519\eclipse_1206.dll
-startup
D:\eclipse VT preconfigured\eclipse\plugins/org.eclipse.equinox.launcher_1.0.201.R35x_v20090715.jar
-showlocation
-product
org.eclipse.epp.package.jee.product
-vm
c:\Program Files\Java\jdk1.6.0_04\jre\bin\client\jvm.dll
eclipse.home.location=file:/D:/eclipse VT preconfigured/eclipse/
eclipse.launcher=D:\eclipse VT preconfigured\eclipse\eclipse.exe
eclipse.p2.data.area=@config.dir/../p2/
eclipse.p2.profile=epp.package.jee
eclipse.product=org.eclipse.epp.package.jee.product
eclipse.startTime=1279882656890
eclipse.vm=c:\Program Files\Java\jdk1.6.0_04\jre\bin\client\jvm.dll
eclipse.vmargs=-Dosgi.requiredJavaVersion=1.5
-Xms40m
-Xmx740m
-Xss4m
-XX:PermSize=128m
-XX:MaxPermSize=128m
-XX:CompileThreshold=5
-XX:MaxGCPauseMillis=10
-XX:MaxHeapFreeRatio=70
-XX:+UseConcMarkSweepGC
-XX:+CMSIncrementalMode
-XX:+CMSIncrementalPacing
-Dcom.sun.management.jmxremote
-Djava.class.path=D:\eclipse VT preconfigured\eclipse\plugins/org.eclipse.equinox.launcher_1.0.201.R35x_v20090715.jar
file.encoding=Cp1252
file.encoding.pkg=sun.io
file.separator=\
java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment
java.awt.printerjob=sun.awt.windows.WPrinterJob
java.class.path=D:\eclipse VT preconfigured\eclipse\plugins/org.eclipse.equinox.launcher_1.0.201.R35x_v20090715.jar
java.class.version=50.0
java.endorsed.dirs=c:\Program Files\Java\jdk1.6.0_04\jre\lib\endorsed
java.ext.dirs=c:\Program Files\Java\jdk1.6.0_04\jre\lib\ext;C:\WINDOWS\Sun\Java\lib\ext
java.home=c:\Program Files\Java\jdk1.6.0_04\jre
java.io.tmpdir=C:\DOCUME~1\argus\LOCALS~1\Temp\
java.library.path=D:\eclipse VT preconfigured\eclipse;.;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;c:/Program Files/Java/jdk1.6.0_04/jre/bin/client;c:/Program Files/Java/jdk1.6.0_04/jre/bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\TortoiseSVN\bin;C:\Program Files\QuickTime\QTSystem\;C:\Program Files\Java\jdk1.6.0_04\bin;C:\Program Files\MySQL\MySQL Server 5.1\bin;C:\Documents and Settings\argus\My Documents\apache-ant-1.7.1-bin\apache-ant-1.7.1\bin;C:\Documents and Settings\argus\My Documents\apache-maven-2.0.10\bin;C:\Documents and Settings\argus\My Documents\groovy-binary-1.7.3\groovy-1.7.3\bin;C:\Documents and Settings\argus\My Documents\patch-2.5.9-7-bin\bin
java.rmi.server.randomIDs=true
java.runtime.name=Java(TM) SE Runtime Environment
java.runtime.version=1.6.0_04-b12
java.specification.name=Java Platform API Specification
java.specification.vendor=Sun Microsystems Inc.
java.specification.version=1.6
java.vendor=Sun Microsystems Inc.
java.vendor.url=http://java.sun.com/
java.vendor.url.bug=http://java.sun.com/cgi-bin/bugreport.cgi
java.version=1.6.0_04
java.vm.info=mixed mode
java.vm.name=Java HotSpot(TM) Client VM
java.vm.specification.name=Java Virtual Machine Specification
java.vm.specification.vendor=Sun Microsystems Inc.
java.vm.specification.version=1.0
java.vm.vendor=Sun Microsystems Inc.
java.vm.version=10.0-b19
line.separator=
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尝试将JAVA_HOME设置为JDK而不是JRE

看来Eclipse仍然是指JRE而不是JDK。此外,Eclipse中的默认运行时(在Preferences对话框的“Installed Runtimes”页面中找到)可能是JRE


我注意到,这有时是由于获得了多个虚拟机配置,并且应用了第一个或最后一个虚拟机配置。您可以通过转到Eclipse的About页面,然后查看Installation Details中的Configuration选项卡来确认是否是这种情况(在Helios中)。通常罪魁祸首是eclipse.ini中缺少的新行。

我也遇到过这种问题

在我的例子中,JAVA_HOME是为我的用户定义的,而PATH是为系统设置的,maven插件使用默认的JRE而不是JDK。 因此,请确保JAVA_HOME和PATH在同一个范围内(我为系统放置了两个变量,并将JAVA_HOME添加为PATH的第一部分)


希望它能帮助别人。

请注意-vm选项的格式-准确地说很重要:

-vm选项及其值(路径)必须位于单独的行中。 该值必须是Java可执行文件的完整绝对路径,而不仅仅是Java主目录。
-vm选项必须出现在-vmargs选项之前,因为-vmargs之后的所有内容都直接传递给JVM。

使用Eclipse创建Maven项目时,项目属性的文本文件编码可能与
pom.xml
中的
project.build.sourceEncoding
不一样。如果是这样的话,那么当您构建项目时,您会得到错误

“在以下位置找不到Javac编译器:…”


例如,我的文本文件编码是GBK,而我的
project.build.sourceEncoding
是UTF-8。我刚刚修改了我的文本文件编码为UTF-8,一切都很好

也许您正在重用在JDK外部设置JRE时所做的“运行配置”。创建一个新的“运行配置”,确保该选项卡显示为Java JDK。

如果所有环境都很好,但仍然会出现构建错误,那么最后的方法是将
Java_HOME
设置为JDK 1.5或更高版本。然后从命令提示符下生成项目。构建应该是成功的

大宗报价

要将JRE转换为JDK,请执行以下操作:

->转到窗口 ->偏好 ->在左上方的搜索框中键入
已安装的JRE
->单击已安装的JRE的

->从右侧对话框中选择添加
->单击标准虚拟机 ->选择“JREHOME”的目录并执行以下“C:\ProgramFiles\java\jdk1.8.0\u 131” ->然后键入“JRE名称”
->单击完成。

在已安装的JRE中添加JDK解决了这个问题,感谢Vineties,这是已安装的JRE。eclipse.ini中的运行时配置引用了JDK中的jvm.dll,所以结果很好。我相信添加JDK正是我在您之前的评论中回答您的,链接到我想您会在这里找到答案!