bash mvn -version 错误：我们无法执行 /usr/libexec/java_home/bin/java
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mvn -version error: We cannot execute /usr/libexec/java_home/bin/java
提问by Tai
====== EDIT 2:
====== 编辑 2：
I used the same code as mentioned below in edit 1, my error apparently was not in the code itself but rather due to source ~/.bash_profile not updating my file as expected. I think, however (thank you @eckes) please see the maven bug:( BTW: jira.codehaus.org/browse/MNG-5686 – eckes 39 secs ago)
我在编辑 1 中使用了与下面提到的相同的代码，我的错误显然不在代码本身中，而是由于源 ~/.bash_profile 没有按预期更新我的文件。我认为，但是（谢谢@eckes）请查看 maven 错误：（顺便说一句：jira.codehaus.org/browse/MNG-5686 – eckes 39 秒前）
EDIT 1: this is not a duplicate of: What should I set JAVA_HOME to on OSX
编辑 1：这不是重复：我应该在 OSX 上将 JAVA_HOME 设置为什么
I have tried all of the solutions mentioned in the above post, and they do not work for me. My issue is that I am doing one of the solutions listed there here (I tried the others). I am still getting the error.
我已经尝试了上面帖子中提到的所有解决方案，但它们对我不起作用。我的问题是我正在执行此处列出的解决方案之一（我尝试了其他解决方案）。我仍然收到错误。
I'm currently trying as per above instructions:
我目前正在按照上述说明进行尝试：
export JAVA_HOME=$(/usr/libexec/java_home)
and getting:
并获得：
source ~/.bash_profile
mvn -version
Error: JAVA_HOME is not defined correctly.
We cannot execute /usr/libexec/java_home/bin/java
======= I installed the latest java jdk from oracle
======== 我从oracle安装了最新的java jdk
java -version
java version "1.8.0_31"
Java(TM) SE Runtime Environment (build 1.8.0_31-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.31-b07, mixed mode)
I installed Xcode to install maven however recent documentation states that I may use brew (Maven Install on Mac OS X)
我安装了 Xcode 来安装 maven，但是最近的文档指出我可以使用 brew（Mac OS X 上的 Maven 安装）
I installed maven with:
我安装了 maven：
//install brew
brew doctor
brew install maven
I then tried:
然后我尝试：
mvn -version
Error: JAVA_HOME is not defined correctly.
I found: http://hathaway.cc/post/69201163472/how-to-edit-your-path-environment-variables-on-mac
我发现：http: //hathaway.cc/post/69201163472/how-to-edit-your-path-environment-variables-on-mac
However this is based on java 7 I believe. But it seemed likely to be a fix.
但是，我相信这是基于 java 7 的。但这似乎是一个修复。
There is no bash_profile on the new mac (https://apple.stackexchange.com/questions/26928/no-bash-profile-in-os-x-lion)
新 Mac 上没有 bash_profile ( https://apple.stackexchange.com/questions/26928/no-bash-profile-in-os-x-lion)
So I created and edited my bash_profile with:
所以我创建并编辑了我的 bash_profile ：
touch ~/.bash_profile
vim ~/.bash_profile
//and added the line export JAVA_HOME=(/usr/libexec/java_home)
My problem is that even with this fix I am still getting the following error:
我的问题是，即使使用此修复程序，我仍然收到以下错误：
mvn -version
Error: JAVA_HOME is not defined correctly.
We cannot execute /usr/libexec/java_home/bin/java
I checked however that within my file system java_home is where the file lies. There is no "/usr/libexec/java_home/bin/java" in my file system as maven error'ed out on.
然而，我检查了我的文件系统 java_home 是文件所在的位置。我的文件系统中没有“/usr/libexec/java_home/bin/java”，因为 maven 出错了。
Has anyone else encountered this with the new java 8, and brew installed maven? I'm using a MacBook Pro (Retina, 13-inch, Mid 2014) running Yosemite. I've installed a setup like this before but never encountered this issue.
有没有其他人在新的 java 8 中遇到过这个问题，并且 brew 安装了 maven？我正在使用运行 Yosemite 的 MacBook Pro（Retina，13 英寸，2014 年中）。我以前安装过这样的设置，但从未遇到过这个问题。
**Note:
**笔记：
I found this: http://www.mkyong.com/java/maven-java_home-is-not-defined-correctly-on-mac-osx/
我发现了这个：http: //www.mkyong.com/java/maven-java_home-is-not-defined-correctly-on-mac-osx/
Which I thought would definitely be my fix. Correct me if I'm wrong but I believe the difference is the parenthesis.
我认为这绝对是我的解决方案。如果我错了，请纠正我，但我相信区别在于括号。
Ex:
前任：
export JAVA_HOME=/usr/libexec/java_home
vs
对比
export JAVA_HOME=(/usr/libexec/java_home)
However my error has not been fixed. (Also just in case anyone asks I source(ed) it before rerunning.) It did however change my error. It removed the additional /bin/java.
但是我的错误没有得到修复。（也以防万一有人在重新运行之前询问我来源（编辑）它。）但是它确实改变了我的错误。它删除了额外的 /bin/java。
mvn -version
Error: JAVA_HOME is not defined correctly.
We cannot execute /usr/libexec/java_home/bin/java
JAVA_HOME:
JAVA_主页：
echo $JAVA_HOME
/Library/Java/JavaVirtualMachines/jdk1.8.0_31.jdk/Contents/Home
**note i tried the $() syntax and this did not fix the problem.
**注意我尝试了 $() 语法，但这并没有解决问题。
回答by RealSkeptic
You missed on one little thing, I believe:
你错过了一件小事，我相信：
export JAVA_HOME=$(/usr/libexec/java_home)
??
This dollar sign
This tells the shell "The value of this expression is the output from executing the following command (/usr/libexec/java_home))"
这告诉shell“这个表达式的值是执行以下命令的输出（/usr/libexec/java_home)）”
Running the command gives the proper java home for the mac (if you have a single JDK installed), and that value is placed in JAVA_HOME. Without the dollar sign, it just puts the name of the command there.
运行该命令会为 mac 提供正确的 java home（如果您安装了单个 JDK），并且该值放置在 JAVA_HOME 中。没有美元符号，它只是把命令的名字放在那里。
回答by Reza Dehnavi
I write on .bash_profile file these lines and then work for me.
我在 .bash_profile 文件上写下这些行，然后对我来说有效。
export JAVA_HOME=$(/usr/libexec/java_home)
export PATH=/Users/(YOUR USER)/Documents/apache-maven-3.0.3/bin:$PATH
export PATH=$JAVA_HOME/jre/bin:$PATH
Note: work on macOS Sierra (10.12.6)
注意：适用于 macOS Sierra (10.12.6)
回答by Shubham Verma
Follow this link : https://stackoverflow.com/a/44564303/5005676If you see the mvn script: The code fails here ---
按照此链接：https: //stackoverflow.com/a/44564303/5005676如果您看到 mvn 脚本：代码在此处失败 ---
Steps for debugging and fixing:
调试和修复步骤：
Step 1: Open the mvn script /Users/Username/apache-maven-3.0.5/bin/mvn (Open with the less command like: less /Users/Username/apache-maven-3.0.5/bin/mvn)
第 1 步：打开 mvn 脚本 /Users/Username/apache-maven-3.0.5/bin/mvn（使用 less 命令打开，例如：less /Users/Username/apache-maven-3.0.5/bin/mvn）
Step 2: Find out the below code in the script:
第 2 步：在脚本中找出以下代码：
if [ -z "$JAVACMD" ] ; then
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD="$JAVA_HOME/jre/sh/java"
else
JAVACMD="$JAVA_HOME/bin/java"
fi
else
JAVACMD="`which java`"
fi
fi
if [ ! -x "$JAVACMD" ] ; then
echo "Error: JAVA_HOME is not defined correctly."
echo " We cannot execute $JAVACMD"
exit 1
fi
Step3: It is happening because JAVACMD variable was not set. So it displays the error.
Step3：发生这种情况是因为未设置 JAVACMD 变量。所以它显示错误。
Note: To Fix it
注意：修复它
export JAVACMD=/Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home/jre/bin/java
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home/
Key: If you want it to be permanent open emacs .profile
关键：如果你想让它永久打开 emacs .profile
post the commands and press Ctrl-x Ctrl-c ( save-buffers-kill-terminal ).
发布命令并按 Ctrl-x Ctrl-c ( save-buffers-kill-terminal )。
回答by Pankaj Avhad
In my case, I had two entries for JAVA_HOME in my ~/.bash_profile and the last one was taking precedence. I just deleted the one which was wrong and it worked.
就我而言，我的 ~/.bash_profile 中有两个 JAVA_HOME 条目，最后一个优先。我刚刚删除了错误的那个并且它起作用了。
