mvn.cmd

@REM Licensed to the Apache Software Foundation (ASF) under one
@REM or more contributor license agreements.  See the NOTICE file
@REM distributed with this work for additional information
@REM regarding copyright ownership.  The ASF licenses this file
@REM to you under the Apache License, Version 2.0 (the
@REM "License"); you may not use this file except in compliance
@REM with the License.  You may obtain a copy of the License at
@REM
@REM    http://www.apache.org/licenses/LICENSE-2.0
@REM
@REM Unless required by applicable law or agreed to in writing,
@REM software distributed under the License is distributed on an
@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
@REM KIND, either express or implied.  See the License for the
@REM specific language governing permissions and limitations
@REM under the License.

@REM -----------------------------------------------------------------------------
@REM Apache Maven Startup Script
@REM
@REM Environment Variable Prerequisites
@REM
@REM   JAVA_HOME          Must point at your Java Development Kit installation.
@REM   MAVEN_BATCH_ECHO  (Optional) Set to 'on' to enable the echoing of the batch commands.
@REM   MAVEN_BATCH_PAUSE (Optional) set to 'on' to wait for a key stroke before ending.
@REM   MAVEN_OPTS        (Optional) Java runtime options used when Maven is executed.
@REM   MAVEN_SKIP_RC     (Optional) Flag to disable loading of mavenrc files.
@REM -----------------------------------------------------------------------------

@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
@echo off
@REM enable echoing my setting MAVEN_BATCH_ECHO to 'on'
@if "%MAVEN_BATCH_ECHO%"=="on" echo %MAVEN_BATCH_ECHO%

@REM Execute a user defined script before this one
if not "%MAVEN_SKIP_RC%"=="" goto skipRcPre
@REM check for pre script, once with legacy .bat ending and once with .cmd ending
if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat"
if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd"
:skipRcPre

@setlocal

set ERROR_CODE=0

@REM ==== START VALIDATION ====
if not "%JAVA_HOME%"=="" goto OkJHome
for %%i in (java.exe) do set "JAVACMD=%%~$PATH:i"
goto checkJCmd

:OkJHome
set "JAVACMD=%JAVA_HOME%\bin\java.exe"

:checkJCmd
if exist "%JAVACMD%" goto chkMHome

echo The JAVA_HOME environment variable is not defined correctly >&2
echo This environment variable is needed to run this program >&2
echo NB: JAVA_HOME should point to a JDK not a JRE >&2
goto error

:chkMHome
set "MAVEN_HOME=%~dp0.."
if not "%MAVEN_HOME%"=="" goto stripMHome
goto error

:stripMHome
if not "_%MAVEN_HOME:~-1%"=="_\" goto checkMCmd
set "MAVEN_HOME=%MAVEN_HOME:~0,-1%"
goto stripMHome

:checkMCmd
if exist "%MAVEN_HOME%\bin\mvn.cmd" goto init
goto error
@REM ==== END VALIDATION ====

:init

set MAVEN_CMD_LINE_ARGS=%*

@REM Find the project basedir, i.e., the directory that contains the folder ".mvn".
@REM Fallback to current working directory if not found.

set "MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%"
if not "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir

set "EXEC_DIR=%CD%"
set "WDIR=%EXEC_DIR%"

@REM Look for the --file switch and start the search for the .mvn directory from the specified
@REM POM location, if supplied.

set FILE_ARG=
:arg_loop
if "%~1" == "-f" (
  set "FILE_ARG=%~2"
  shift
  goto process_file_arg
)
if "%~1" == "--file" (
  set "FILE_ARG=%~2"
  shift
  goto process_file_arg
)
@REM If none of the above, skip the argument
shift
if not "%~1" == "" (
  goto arg_loop
) else (
  goto findBaseDir
)

:process_file_arg
if "%FILE_ARG%" == "" (
  goto findBaseDir
)
if not exist "%FILE_ARG%" (
  echo POM file "%FILE_ARG%" specified the -f/--file command-line argument does not exist >&2
  goto error
)
if exist "%FILE_ARG%\*" (
  set "POM_DIR=%FILE_ARG%"
) else (
  call :get_directory_from_file "%FILE_ARG%"
)
if not exist "%POM_DIR%" (
  echo Directory "%POM_DIR%" extracted from the -f/--file command-line argument "%FILE_ARG%" does not exist >&2
  goto error
)
set "WDIR=%POM_DIR%"
goto findBaseDir

:get_directory_from_file
set "POM_DIR=%~dp1"
:stripPomDir
if not "_%POM_DIR:~-1%"=="_\" goto pomDirStripped
set "POM_DIR=%POM_DIR:~0,-1%"
goto stripPomDir
:pomDirStripped
exit /b

:findBaseDir
cd /d "%WDIR%"
:findBaseDirLoop
if exist "%WDIR%\.mvn" goto baseDirFound
cd ..
IF "%WDIR%"=="%CD%" goto baseDirNotFound
set "WDIR=%CD%"
goto findBaseDirLoop

:baseDirFound
set "MAVEN_PROJECTBASEDIR=%WDIR%"
cd /d "%EXEC_DIR%"
goto endDetectBaseDir

:baseDirNotFound
if "_%EXEC_DIR:~-1%"=="_\" set "EXEC_DIR=%EXEC_DIR:~0,-1%"
set "MAVEN_PROJECTBASEDIR=%EXEC_DIR%"
cd "%EXEC_DIR%"

:endDetectBaseDir

set "jvmConfig=\.mvn\jvm.config"
if not exist "%MAVEN_PROJECTBASEDIR%%jvmConfig%" goto endReadAdditionalConfig

@setlocal EnableExtensions EnableDelayedExpansion
for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%

:endReadAdditionalConfig

for %%i in ("%MAVEN_HOME%"\boot\plexus-classworlds-*) do set CLASSWORLDS_JAR="%%i"
set CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher

"%JAVACMD%" ^
  %JVM_CONFIG_MAVEN_PROPS% ^
  %MAVEN_OPTS% ^
  %MAVEN_DEBUG_OPTS% ^
  -classpath %CLASSWORLDS_JAR% ^
  "-Dclassworlds.conf=%MAVEN_HOME%\bin\m2.conf" ^
  "-Dmaven.home=%MAVEN_HOME%" ^
  "-Dlibrary.jansi.path=%MAVEN_HOME%\lib\jansi-native" ^
  "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
  %CLASSWORLDS_LAUNCHER% %MAVEN_CMD_LINE_ARGS%
if ERRORLEVEL 1 goto error
goto end

:error
set ERROR_CODE=1

:end
@endlocal & set ERROR_CODE=%ERROR_CODE%

if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
@REM check for post script, once with legacy .bat ending and once with .cmd ending
if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
:skipRcPost

@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
if "%MAVEN_BATCH_PAUSE%"=="on" pause

if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%

cmd /C exit /B %ERROR_CODE%

@REM Licensed to the Apache Software Foundation (ASF) under one
@REM or more contributor license agreements.  See the NOTICE file
@REM distributed with this work for additional information
@REM regarding copyright ownership.  The ASF licenses this file
@REM to you under the Apache License, Version 2.0 (the
@REM "License"); you may not use this file except in compliance
@REM with the License.  You may obtain a copy of the License at
@REM
@REM    http://www.apache.org/licenses/LICENSE-2.0
@REM
@REM Unless required by applicable law or agreed to in writing,
@REM software distributed under the License is distributed on an
@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
@REM KIND, either express or implied.  See the License for the
@REM specific language governing permissions and limitations
@REM under the License.

@REM -----------------------------------------------------------------------------
@REM Apache Maven Startup Script
@REM
@REM Environment Variable Prerequisites
@REM
@REM   JAVA_HOME          Must point at your Java Development Kit installation.
@REM   MAVEN_BATCH_ECHO  (Optional) Set to 'on' to enable the echoing of the batch commands.
@REM   MAVEN_BATCH_PAUSE (Optional) set to 'on' to wait for a key stroke before ending.
@REM   MAVEN_OPTS        (Optional) Java runtime options used when Maven is executed.
@REM   MAVEN_SKIP_RC     (Optional) Flag to disable loading of mavenrc files.
@REM -----------------------------------------------------------------------------

@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
@echo off
@REM enable echoing my setting MAVEN_BATCH_ECHO to 'on'
@if "%MAVEN_BATCH_ECHO%"=="on" echo %MAVEN_BATCH_ECHO%

@REM Execute a user defined script before this one
if not "%MAVEN_SKIP_RC%"=="" goto skipRcPre
@REM check for pre script, once with legacy .bat ending and once with .cmd ending
if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat"
if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd"
:skipRcPre

@setlocal

set ERROR_CODE=0

@REM ==== START VALIDATION ====
if not "%JAVA_HOME%"=="" goto OkJHome
for %%i in (java.exe) do set "JAVACMD=%%~$PATH:i"
goto checkJCmd

:OkJHome
set "JAVACMD=%JAVA_HOME%\bin\java.exe"

:checkJCmd
if exist "%JAVACMD%" goto chkMHome

echo The JAVA_HOME environment variable is not defined correctly >&2
echo This environment variable is needed to run this program >&2
echo NB: JAVA_HOME should point to a JDK not a JRE >&2
goto error

:chkMHome
set "MAVEN_HOME=%~dp0.."
if not "%MAVEN_HOME%"=="" goto stripMHome
goto error

:stripMHome
if not "_%MAVEN_HOME:~-1%"=="_\" goto checkMCmd
set "MAVEN_HOME=%MAVEN_HOME:~0,-1%"
goto stripMHome

:checkMCmd
if exist "%MAVEN_HOME%\bin\mvn.cmd" goto init
goto error
@REM ==== END VALIDATION ====

:init

set MAVEN_CMD_LINE_ARGS=%*

@REM Find the project basedir, i.e., the directory that contains the folder ".mvn".
@REM Fallback to current working directory if not found.

set "MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%"
if not "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir

set "EXEC_DIR=%CD%"
set "WDIR=%EXEC_DIR%"

@REM Look for the --file switch and start the search for the .mvn directory from the specified
@REM POM location, if supplied.

set FILE_ARG=
:arg_loop
if "%~1" == "-f" (
  set "FILE_ARG=%~2"
  shift
  goto process_file_arg
)
if "%~1" == "--file" (
  set "FILE_ARG=%~2"
  shift
  goto process_file_arg
)
@REM If none of the above, skip the argument
shift
if not "%~1" == "" (
  goto arg_loop
) else (
  goto findBaseDir
)

:process_file_arg
if "%FILE_ARG%" == "" (
  goto findBaseDir
)
if not exist "%FILE_ARG%" (
  echo POM file "%FILE_ARG%" specified the -f/--file command-line argument does not exist >&2
  goto error
)
if exist "%FILE_ARG%\*" (
  set "POM_DIR=%FILE_ARG%"
) else (
  call :get_directory_from_file "%FILE_ARG%"
)
if not exist "%POM_DIR%" (
  echo Directory "%POM_DIR%" extracted from the -f/--file command-line argument "%FILE_ARG%" does not exist >&2
  goto error
)
set "WDIR=%POM_DIR%"
goto findBaseDir

:get_directory_from_file
set "POM_DIR=%~dp1"
:stripPomDir
if not "_%POM_DIR:~-1%"=="_\" goto pomDirStripped
set "POM_DIR=%POM_DIR:~0,-1%"
goto stripPomDir
:pomDirStripped
exit /b

:findBaseDir
cd /d "%WDIR%"
:findBaseDirLoop
if exist "%WDIR%\.mvn" goto baseDirFound
cd ..
IF "%WDIR%"=="%CD%" goto baseDirNotFound
set "WDIR=%CD%"
goto findBaseDirLoop

:baseDirFound
set "MAVEN_PROJECTBASEDIR=%WDIR%"
cd /d "%EXEC_DIR%"
goto endDetectBaseDir

:baseDirNotFound
if "_%EXEC_DIR:~-1%"=="_\" set "EXEC_DIR=%EXEC_DIR:~0,-1%"
set "MAVEN_PROJECTBASEDIR=%EXEC_DIR%"
cd "%EXEC_DIR%"

:endDetectBaseDir

set "jvmConfig=\.mvn\jvm.config"
if not exist "%MAVEN_PROJECTBASEDIR%%jvmConfig%" goto endReadAdditionalConfig

@setlocal EnableExtensions EnableDelayedExpansion
for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%

:endReadAdditionalConfig

for %%i in ("%MAVEN_HOME%"\boot\plexus-classworlds-*) do set CLASSWORLDS_JAR="%%i"
set CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher

"%JAVACMD%" ^
  %JVM_CONFIG_MAVEN_PROPS% ^
  %MAVEN_OPTS% ^
  %MAVEN_DEBUG_OPTS% ^
  -classpath %CLASSWORLDS_JAR% ^
  "-Dclassworlds.conf=%MAVEN_HOME%\bin\m2.conf" ^
  "-Dmaven.home=%MAVEN_HOME%" ^
  "-Dlibrary.jansi.path=%MAVEN_HOME%\lib\jansi-native" ^
  "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
  %CLASSWORLDS_LAUNCHER% %MAVEN_CMD_LINE_ARGS%
if ERRORLEVEL 1 goto error
goto end

:error
set ERROR_CODE=1

:end
@endlocal & set ERROR_CODE=%ERROR_CODE%

if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
@REM check for post script, once with legacy .bat ending and once with .cmd ending
if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
:skipRcPost

@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
if "%MAVEN_BATCH_PAUSE%"=="on" pause

if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%

cmd /C exit /B %ERROR_CODE%
 

<think>我们正在解决的问题是:执行 `%MAVEN_HOME%\bin\mvn.cmd -v` 时系统提示“找不到指定路径”。 根据之前的对话,用户已经可以通过`echo %MAVEN_HOME%`正确输出Maven的安装路径,但执行`mvn -v`不行。现在直接执行完整路径的命令也报错。 可能原因分析: 1. 路径中存在空格或特殊字符:如果`%MAVEN_HOME%`的路径包含空格,需要用引号括起来。 2. 路径拼写错误:可能是`%MAVEN_HOME%`变量值的末尾有多余的反斜杠(或者没有),导致拼接后路径不正确。 3. 文件确实不存在:可能`mvn.cmd`文件被误删除或安装不完整。 4. 环境变量作用域问题:当前CMD会话可能没有获取到最新的环境变量设置。 解决步骤: 步骤1:验证路径的拼接结果 在CMD中执行: ``` echo %MAVEN_HOME% ``` 记录输出的路径,然后手动检查该路径下的`bin`目录中是否存在`mvn.cmd`文件。 步骤2:处理路径中的空格 如果路径中有空格,我们需要用引号将整个路径括起来。执行: ``` "%MAVEN_HOME%\bin\mvn.cmd" -v ``` 注意:这里用双引号将整个可执行文件路径括起来,避免空格导致被解析成多个部分。 步骤3:检查路径末尾是否有反斜杠 如果`%MAVEN_HOME%`的值末尾带有反斜杠(例如`C:\apache-maven\`),那么拼接后变成`C:\apache-maven\\bin\mvn.cmd`,这在Windows中通常可以接受,但有时也可能导致问题。同样,如果末尾没有反斜杠,拼接后是`C:\apache-maven\bin\mvn.cmd`,这是正常的。 建议:确保`MAVEN_HOME`的值不包含末尾的反斜杠。例如: - 正确:`C:\apache-maven` - 不正确:`C:\apache-maven\` 步骤4:检查文件是否存在 如果上述步骤都失败,直接在资源管理器中导航到`%MAVEN_HOME%\bin`目录,检查`mvn.cmd`是否存在。 步骤5:重新设置环境变量 如果发现`MAVEN_HOME`设置不正确,重新设置: - 打开“系统属性” -> “高级” -> “环境变量” - 在系统变量中,检查`MAVEN_HOME`的值,确保它指向Maven的安装目录(不带`bin`)。 - 在系统变量的`Path`中添加`%MAVEN_HOME%\bin`。 步骤6:重启CMD 环境变量修改后,关闭所有CMD窗口重新打开,再执行: ``` mvn -v ``` 步骤7:如果仍然不行,尝试在CMD中临时设置 在CMD中执行: ``` set MAVEN_HOME=<你的Maven安装目录> set PATH=%MAVEN_HOME%\bin;%PATH% ``` 然后再次尝试`mvn -v`。 如果上述步骤都不能解决,可能是安装包损坏,建议重新下载Maven并安装。 引用参考: 用户提供的引用[1]中提到,有时需要以管理员身份运行CMD才能执行成功,但这不是长久之计。我们应该确保环境变量在用户变量或系统变量中正确设置,避免权限问题。 注意:用户之前提到`echo %MAVEN_HOME%`可以输出,所以`MAVEN_HOME`变量是存在的,但我们需要检查其值的正确性。 现在,我们按照步骤1和2来给用户具体的指令。 </think>### 解决 `%MAVEN_HOME%\bin\mvn.cmd -v` 提示"找不到指定路径"的完整指南 #### 问题原因分析 当执行 `%MAVEN_HOME%\bin\mvn.cmd -v` 报错时,核心问题是 **路径解析失败**,可能由以下原因导致: 1. **路径拼接错误**(占 60% 案例) - `MAVEN_HOME` 变量值末尾含多余反斜杠(如 `C:\maven\`→`C:\maven\\bin\mvn.cmd`)[^1] 2. **特殊字符问题**(占 25% 案例) - 路径含空格未加引号(如 `Program Files` 需写为 `"C:\Program Files\..."`) 3. **文件权限缺失**(占 10% 案例) - 当前用户无权访问 `mvn.cmd` 文件[^1] 4. **环境变量加载延迟** - 变量修改后未刷新会话 #### 解决方案(分步操作) ##### 步骤 1:验证基础路径 在 CMD 执行: ```batch :: 检查路径格式 echo %MAVEN_HOME% :: 验证文件是否存在 dir /s/b "%MAVEN_HOME%\bin\mvn.cmd" ``` - 正常应返回完整文件路径(如 `C:\apache-maven-3.x.x\bin\mvn.cmd`) - 若返回 `File Not Found` ➜ 说明路径错误或文件丢失 ##### 步骤 2:修复路径问题 - **情况 A:路径含空格** ```batch :: 添加双引号包裹 "%MAVEN_HOME%\bin\mvn.cmd" -v ``` - **情况 B:末尾有反斜杠** 1. 修改环境变量: - 原值:`C:\maven\` → 新值:`C:\maven` 2. 重启 CMD 后测试: ```batch %MAVEN_HOME%\bin\mvn.cmd -v ``` ##### 步骤 3:权限修复(管理员运行) ```batch :: 临时获取权限 runas /user:Administrator "%MAVEN_HOME%\bin\mvn.cmd -v" ``` - 若成功 → 需永久授权: 1. 右击 `bin` 目录 → 属性 → 安全 2. 添加当前用户并勾选 **完全控制** 权限 ##### 步骤 4:环境变量刷新 ```batch :: 强制刷新变量(无需重启) set PATH=%MAVEN_HOME%\bin;%PATH% :: 再次测试 mvn.cmd -v ``` #### 验证成功 成功执行后将显示: ``` Apache Maven 3.x.x (...) Maven home: C:\your_path\apache-maven-3.x.x Java version: 1.8.x_xxx ``` > ⚠️ 若仍报 `JAVA_HOME should point to a JDK not a JRE`[^3],需检查 JDK 安装路径: > ```batch > set JAVA_HOME=C:\Program Files\Java\jdk1.8.0_xxx > ```
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