Windows下Maven安装：“JAVA_HOME设置为无效目录”
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Maven Installation under Windows: "JAVA_HOME is set to an invalid directory"
提问by user2006189
I'm new to Maven and I have downloaded the 3.0.5 version. I'm getting the following error:
我是 Maven 的新手，我已经下载了 3.0.5 版本。我收到以下错误：
JAVA_HOME is set to an invalid directory. please set the java_home variable in your environment variable to match the location of your java installation
Although, I see no error when I type javacor echo %M2_HOME%in the command prompt.
尽管如此，当我在命令提示符中键入javac或回显时，我没有看到任何错误%M2_HOME%。
I have the following path variables set -
我设置了以下路径变量 -
CLASSPATH - ;C:\Program Files (x86)\Java\jdk1.7.0_40\lib;
JAVA_HOME - C:\Program Files (x86)\Java\jdk1.7.0_40\bin
M2 - %M2_HOME%\bin
M2_HOME - C:\Users\cbil\Documents\Maven\apache-maven-3.0.5-bin\apache-maven-3.0.5
MAVEN_OPTS - -Xms256m -Xmx512m
PATH - C:\Program Files\Java\jdk1.7.0_45\bin;C:\Users\cbil\Documents\Maven\apache-maven-3.0.5-bin\apache-maven-3.0.5\bin;
Can someone please help me?
有人可以帮帮我吗？
回答by Sajan Chandran
To set JAVA_HOME
设置JAVA_HOME
set JAVA_HOME=C:\Program Files (x86)\Java\jdk1.7.0_40
set JAVA_HOME=C:\Program Files (x86)\Java\jdk1.7.0_40
To add mvnto path
添加mvn到路径
set PATH=%PATH%;C:\Users\cbil\Documents\Maven\apache-maven-3.0.5-bin\apache-maven-3.0.5\bin;
set PATH=%PATH%;C:\Users\cbil\Documents\Maven\apache-maven-3.0.5-bin\apache-maven-3.0.5\bin;
回答by zerocool
JAVA_HOME should be set to jdk installation directory and not to the bin folder.
JAVA_HOME 应该设置为 jdk 安装目录而不是 bin 文件夹。
It should work, once the path is set properly.
一旦路径设置正确，它应该可以工作。
回答by Braj
M2_HOMEpoints to the directory where maven is installed.M2points to the bindirectory under mavenJAVA_HOMEpoints to the JDK directory installed on your system.
M2_HOME指向maven安装目录。M2指向maven下的bin目录JAVA_HOME指向安装在系统上的 JDK 目录。
validate it again from below settings:
从以下设置再次验证它：
JAVA_HOME - C:\Program Files\Java\jdk1.6.0_23
M2_HOME - D:\Software\apache-maven-3.0.5
M2 - %M2_HOME%\bin
PATH - %M2%;%JAVA_HOME%\bin
回答by achingfingers
Read the official documentation. The Maven Installation Instructionsfor Windows are pretty simple to follow.
阅读官方文档。适用于 Windows的Maven 安装说明非常易于遵循。
Windows
Unzip the distribution archive, i.e. apache-maven-3.2.1-bin.zip to the directory you wish to install Maven 3.2.1. These instructions assume you chose C:\Program Files\Apache Software Foundation. The subdirectory apache-maven-3.2.1 will be created from the archive.
Add the M2_HOME environment variable by opening up the system properties (WinKey + Pause), selecting the "Advanced" tab, and the "Environment Variables" button, then adding the M2_HOME variable in the user variables with the value C:\Program Files\Apache Software Foundation\apache-maven-3.2.1. Be sure to omit any quotation marks around the path even if it contains spaces. Note: For Maven 2.0.9, also be sure that the M2_HOME doesn't have a '\' as last character.
In the same dialog, add the M2 environment variable in the user variables with the value %M2_HOME%\bin.
Optional: In the same dialog, add the MAVEN_OPTS environment variable in the user variables to specify JVM properties, e.g. the value -Xms256m -Xmx512m. This environment variable can be used to supply extra options to Maven.
In the same dialog, update/create the Path environment variable in the user variables and prepend the value %M2% to add Maven available in the command line.
In the same dialog, make sure that JAVA_HOME exists in your user variables or in the system variables and it is set to the location of your JDK, e.g. C:\Program Files\Java\jdk1.7.0_51 and that %JAVA_HOME%\bin is in your Path environment variable.
Open a new command prompt (Winkey + R then type cmd) and run mvn --version to verify that it is correctly installed.
视窗
将分发包解压缩，即 apache-maven-3.2.1-bin.zip 到您希望安装 Maven 3.2.1 的目录。这些说明假设您选择了 C:\Program Files\Apache Software Foundation。子目录 apache-maven-3.2.1 将从存档中创建。
通过打开系统属性（WinKey + Pause），选择“高级”选项卡和“环境变量”按钮添加 M2_HOME 环境变量，然后将 M2_HOME 变量添加到用户变量中，值为 C:\Program Files\ Apache 软件基金会\apache-maven-3.2.1。确保省略路径周围的任何引号，即使它包含空格。注意：对于 Maven 2.0.9，还要确保 M2_HOME 没有“\”作为最后一个字符。
在同一个对话框中，在用户变量中添加 M2 环境变量，其值为 %M2_HOME%\bin。
可选：在同一对话框中，在用户变量中添加 MAVEN_OPTS 环境变量以指定 JVM 属性，例如值 -Xms256m -Xmx512m。此环境变量可用于为 Maven 提供额外选项。
在同一个对话框中，更新/创建用户变量中的 Path 环境变量并在前面添加值 %M2% 以添加命令行中可用的 Maven。
在同一个对话框中，确保 JAVA_HOME 存在于您的用户变量或系统变量中，并将其设置为 JDK 的位置，例如 C:\Program Files\Java\jdk1.7.0_51 和 %JAVA_HOME%\bin位于您的 Path 环境变量中。
打开一个新的命令提示符（Winkey + R 然后键入 cmd）并运行 mvn --version 以验证它是否已正确安装。
回答by AppleBud
Inside your system variables, set JAVA_HOME
在系统变量中，设置 JAVA_HOME
JAVA_HOME=C:\Program Files\Java\jdk1.7.0_45
and inside path, add these:
在路径内部，添加这些：
C:\maven\bin;%JAVA_HOME%\bin;
The error is caused due to non readability of the java path .
该错误是由于 java 路径的不可读性引起的。
