我正在尝试在 Windows 7 上设置 Maven。我尝试了版本 3.3.3 和 3.3.1，结果相同。我尝试使用 JAVA_HOME 和路径变量更改 jdk，但我得到了相同的结果。
我是 Maven 的新手，所以请原谅我的无知。

我从 mvn.cmd 脚本中注释掉了 echo off 以尝试调试。

启动 maven 的 java 调用只显示 java 帮助消息，就好像命令不知何故无效一样。我做错了什么？

H:\>"C:\bin\jdk1.7.0_60\bin\java.exe"    -classpath "c:\bin\apache-maven-3.3.1\bin\..\boot\plexus-classworlds-2.5.2.jar" "-Dclassworlds.conf=c:\bin\apache-maven-3.3.1\bin\..\bin\m2.conf" "-Dmaven.home=c:\bin\apache-maven-3.3.1\bin\.." "-Dmaven.multiModuleProjectDirectory=H:\" org.codehaus.plexus.classworlds.launcher.Launcher

H:\>mvn

H:\>if "H:\" == "" (set "HOME=H:\" )

H:\>if not "" == "" goto skipRcPre

H:\>if exist "H:\\mavenrc_pre.bat" call "H:\\mavenrc_pre.bat"

H:\>if exist "H:\\mavenrc_pre.cmd" call "H:\\mavenrc_pre.cmd"

H:\>set ERROR_CODE=0

H:\>if not "C:\bin\jdk1.7.0_60" == "" goto OkJHome

H:\>if exist "C:\bin\jdk1.7.0_60\bin\java.exe" goto chkMHome

H:\>if not "" == "" goto valMHome

H:\>SET "M2_HOME=c:\bin\apache-maven-3.3.1\bin\.."

H:\>if not "c:\bin\apache-maven-3.3.1\bin\.." == "" goto valMHome

H:\>if not "_." == "_\" goto checkMCmd

H:\>if exist "c:\bin\apache-maven-3.3.1\bin\..\bin\mvn.cmd" goto init

H:\>set MAVEN_CMD_LINE_ARGS=

H:\>set MAVEN_PROJECTBASEDIR=

H:\>IF NOT "" == "" goto endDetectBaseDir

H:\>set EXEC_DIR=H:\

H:\>set WDIR=H:\

H:\>IF EXIST "H:\"\.mvn goto baseDirFound

H:\>cd ..

H:\>IF "H:\" == "H:\" goto baseDirNotFound

H:\>set MAVEN_PROJECTBASEDIR=H:\

H:\>cd "H:\"

H:\>IF NOT EXIST "H:\\.mvn\jvm.config" goto endReadAdditionalConfig

H:\>SET MAVEN_JAVA_EXE="C:\bin\jdk1.7.0_60\bin\java.exe"

H:\>for %i in ("c:\bin\apache-maven-3.3.1\bin\.."\boot\plexus-classworlds-*) do set CLASSWORLDS_JAR="%i"

H:\>set CLASSWORLDS_JAR="c:\bin\apache-maven-3.3.1\bin\..\boot\plexus-classworlds-2.5.2.jar"

H:\>set CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher

H:\>"C:\bin\jdk1.7.0_60\bin\java.exe"    -classpath "c:\bin\apache-maven-3.3.1\bin\..\boot\plexus-classworlds-2.5.2.jar" "-Dclassworlds.conf=c:\bin\apache-maven-3.3.1\bin\..\bin\m2.conf" "-Dmaven.home=c:\bin\apache-maven-3.3.1\bin\.." "-Dmaven.multiModuleProjectDirectory=H:\" org.codehaus.plexus.classworlds.launcher.Launcher
Usage: java [-options] class [args...]
           (to execute a class)
   or  java [-options] -jar jarfile [args...]
           (to execute a jar file)
where options include:
    -d32          use a 32-bit data model if available
    -d64          use a 64-bit data model if available
    -server       to select the "server" VM
    -hotspot      is a synonym for the "server" VM  [deprecated]
                  The default VM is server.

    -cp <class search path of directories and zip/jar files>
    -classpath <class search path of directories and zip/jar files>
                  A ; separated list of directories, JAR archives,
                  and ZIP archives to search for class files.
    -D<name>=<value>
                  set a system property
    -verbose:[class|gc|jni]
                  enable verbose output
    -version      print product version and exit
    -version:<value>
                  require the specified version to run
    -showversion  print product version and continue
    -jre-restrict-search | -no-jre-restrict-search
                  include/exclude user private JREs in the version search
    -? -help      print this help message
    -X            print help on non-standard options
    -ea[:<packagename>...|:<classname>]
    -enableassertions[:<packagename>...|:<classname>]
                  enable assertions with specified granularity
    -da[:<packagename>...|:<classname>]
    -disableassertions[:<packagename>...|:<classname>]
                  disable assertions with specified granularity
    -esa | -enablesystemassertions
                  enable system assertions
    -dsa | -disablesystemassertions
                  disable system assertions
    -agentlib:<libname>[=<options>]
                  load native agent library <libname>, e.g. -agentlib:hprof
                  see also, -agentlib:jdwp=help and -agentlib:hprof=help
    -agentpath:<pathname>[=<options>]
                  load native agent library by full pathname
    -javaagent:<jarpath>[=<options>]
                  load Java programming language agent, see java.lang.instrument
    -splash:<imagepath>
                  show splash screen with specified image
See http://www.oracle.com/technetwork/java/javase/documentation/index.html for more details.

H:\>if ERRORLEVEL 1 goto error

H:\>set ERROR_CODE=1

H:\>if not "" == "" goto skipRcPost

H:\>if exist "H:\\mavenrc_post.bat" call "H:\\mavenrc_post.bat"

H:\>if exist "H:\\mavenrc_post.cmd" call "H:\\mavenrc_post.cmd"

H:\>if "" == "on" pause

H:\>if "" == "on" exit 1

H:\>exit /B 1

H:\>

最佳答案

"-Dmaven.multiModuleProjectDirectory=H:\" 我是问题所在。显然，java.exe 试图取消转义字符串 \"。

java "-Dabc=xyz\"my.Dummy

对我产生同样的错误，而

java "-Dabc=xyz\\"my.Dummy 似乎有效。

如果您使用另一个项目目录路径，看看情况是否有所改变，或者尝试 "-Dmaven.multiModuleProjectDirectory=H:\\"。

%HOME% 是 mvn 看的环境变量，所以你可能想将它设置为另一个值，或者 "" 让 maven 使用默认路径%HOMEDRIVE%%HOMEPATH%。

关于java - 尝试在 Windows 上运行 Maven 时出错，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31591008/