Windows下的java Maven安装：“java_HOME设置为无效目录”

Question

我是Maven的新手，我已经下载了3.0.5版本。我发现以下错误：

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

不过，在命令提示符中键入javac或echo %M2_HOME%时，我没有看到任何错误

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;

谁能帮帮我吗

Answer 1

阅读官方文件。Windows的Maven Installation Instructions操作非常简单

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.

Answer 2

将JAVA_设置为主页

set JAVA_HOME=C:\Program Files (x86)\Java\jdk1.7.0_40

将mvn添加到路径

set PATH=%PATH%;C:\Users\cbil\Documents\Maven\apache-maven-3.0.5-bin\apache-maven-3.0.5\bin;

Answer 3

在系统变量中，将JAVA_设置为HOME

JAVA_HOME=C:\Program Files\Java\jdk1.7.0_45

在path中，添加以下内容：

 C:\maven\bin;%JAVA_HOME%\bin;

该错误是由于java路径的不可读性造成的

Answer 4

JAVA_HOME应该设置为jdk安装目录，而不是bin文件夹

一旦路径设置正确，它应该可以工作

Answer 5

• M2_HOME指向安装maven的目录
• M2指向maven下的bin目录
• JAVA_HOME指向系统上安装的JDK目录

从以下设置再次验证：

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