Question

当我运行命令

时

mvn version

在ubuntu中我收到以下错误。

错误：未正确定义JAVA_HOME。我们无法执行/ usr / lib / jvm / java-7-openjdk-amd64 / bin / java

我的java版本是

java版＆＃34; 1.8.0_91＆＃34; Java（TM）SE运行时环境（构建 1.8.0_91-b14）Java HotSpot（TM）64位服务器VM（内置25.91-b14，混合模式）

我跑

sudo nano / etc / environment

命令并将java home和maven设置为

JAVA_HOME =＆＃34; / usr / lib中/ JVM / JAVA -8- ORACLE / JRE＆＃34; M2_HOME =的/ usr /本地/ Apache-行家/ Apache的行家-3.2.5 MAVEN_HOME =的/ usr /本地/ Apache-行家/ Apache的行家-3.2.5 M2 =的/ usr /本地/ Apache-行家/ Apache的行家-3.2.5 / bin中

我的路径变量是 -

的/ usr /共享/ maven3 / bin中：在/ usr / local / sbin中：在/ usr / local / bin中：/ usr / sbin目录：在/ usr / bin中：/ sbin目录：/ bin中：在/ usr /游戏：在/ usr /本地/游戏：/ usr / lib中/ JVM / JAVA-8 ORACLE / JRE：/家庭/ hduser /斌：/ usr / lib中/ JVM / java的8甲骨文/斌：在/ usr /本地/ Hadoop的/ bin中：在/ usr /本地/ Hadoop的/ sbin目录：在/ usr /本地/ Hadoop的/ bin中：/ usr / lib中/ sqoop /斌：/家庭/ hduser /斌：/ usr / lib中/ JVM / JAVA-8 ORACLE / JRE /箱

并运行命令

sudo nano~ / .bashrc

并在最后设置

JAVA_HOME = / usr / lib中/ JVM / JAVA -8- ORACLE / JRE PATH = $ PATH：$ HOME / bin：$ JAVA_HOME / bin export JAVA_HOME export JRE_HOME export PATH export M2_HOME = / usr / share / maven3 export M2 = $ M2_HOME / bin export PATH = $ M2：$ PATH

我已安装java 8并删除java 7，然后运行mvn命令，我收到此错误。我很想知道为什么它显示java 7而不是java 8并且还请建议我一些解决方案。提前致谢

修改

我的bashrc是 -

    # ~/.bashrc: executed by bash(1) for non-login shells.
    # see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
    # for examples

    # If not running interactively, don't do anything
    case $- in
        *i*) ;;
          *) return;;
    esac

    # don't put duplicate lines or lines starting with space in the history.
    # See bash(1) for more options
    HISTCONTROL=ignoreboth

    # append to the history file, don't overwrite it
    shopt -s histappend

    # for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
    HISTSIZE=1000

    # ~/.bashrc: executed by bash(1) for non-login shells.
    # see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
    # for examples

    # If not running interactively, don't do anything
    case $- in
        *i*) ;;
          *) return;;
    esac

    # don't put duplicate lines or lines starting with space in the history.
    # See bash(1) for more options
    HISTCONTROL=ignoreboth

    # append to the history file, don't overwrite it
    shopt -s histappend

    # for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
    HISTSIZE=1000
    HISTFILESIZE=2000

    # check the window size after each command and, if necessary,
    # update the values of LINES and COLUMNS.
shopt -s checkwinsize

# If set, the pattern "**" used in a pathname expansion context will
# match all files and zero or more directories and subdirectories.
#shopt -s globstar

# make less more friendly for non-text input files, see lesspipe(1)
[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"

# set variable identifying the chroot you work in (used in the prompt below)
if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
fi

# set a fancy prompt (non-color, unless we know we "want" color)
case "$TERM" in
    xterm-color) color_prompt=yes;;
esac

# uncomment for a colored prompt, if the terminal has the capability; turned
# off by default to not distract the user: the focus in a terminal window
# should be on the output of commands, not on the prompt
#force_color_prompt=yes

if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
        # We have color support; assume it's compliant with Ecma-48
        # (ISO/IEC-6429). (Lack of such support is extremely rare, and such
        # a case would tend to support setf rather than setaf.)
        color_prompt=yes
    else
        color_prompt=
    fi
fi

if [ "$color_prompt" = yes ]; then
    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
else
    PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
fi
unset color_prompt force_color_prompt

# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*)
    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
    ;;
*)
    ;;
esac

# enable color support of ls and also add handy aliases
if [ -x /usr/bin/dircolors ]; then
    test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"
    alias ls='ls --color=auto'
    #alias dir='dir --color=auto'
    #alias vdir='vdir --color=auto'

    alias grep='grep --color=auto'
    alias fgrep='fgrep --color=auto'
    alias egrep='egrep --color=auto'
fi

# some more ls aliases
alias ll='ls -alF'
alias la='ls -A'

alias l='ls -CF'

# Add an "alert" alias for long running commands.  Use like so:
#   sleep 10; alert
alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*al$

# Alias definitions.
# You may want to put all your additions into a separate file like
# ~/.bash_aliases, instead of adding them here directly.
# See /usr/share/doc/bash-doc/examples in the bash-doc package.

if [ -f ~/.bash_aliases ]; then
    . ~/.bash_aliases
fi

# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if ! shopt -oq posix; then
  if [ -f /usr/share/bash-completion/bash_completion ]; then
    . /usr/share/bash-completion/bash_completion
  elif [ -f /etc/bash_completion ]; then

 . /etc/bash_completion
  fi
fi
#=======================================
# Added by TKS to conexport PATH=$JAVA_HOME/bin:$PATH
figure HDFS
#=======================================
#HADOOP VARIABLES START
export HADOOP_INSTALL=/usr/local/hadoop
export PATH=$PATH:$HADOOP_INSTALL/bin
export PATH=$PATH:$HADOOP_INSTALL/sbin
export HADOOP_MAPRED_HOME=$HADOOP_INSTALL
export HADOOP_COMMON_HOME=$HADOOP_INSTALL
export HADOOP_HDFS_HOME=$HADOOP_INSTALL
export YARN_HOME=$HADOOP_INSTALL
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_INSTALL/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_INSTALL/lib"
export HADOOP_HOME=/usr/local/hadoop
#export SQOOP_HOME=/usr/local/sqoop
export PATH=$PATH:$HADOOP_HOME/bin
#export PATH=$PATH:$SQOOP_HOME/bin
export SQOOP_HOME=/usr/lib/sqoop
#HADOOP VARIABLES END
JAVA_HOME=/usr/lib/jvm/java-8-oracle
PATH=$PATH:$JAVA_HOME/bin
export JAVA_HOME
export PATH
export M2_HOME=/usr/local/apache-maven/apache-maven-3.2.5
export M2=$M2_HOME/bin
export PATH=$M2:$PATH

Answer 1

我认为你的JAVA_HOME应该是JDK而不是JRE，因为Maven编译Java代码并且JRE中没有Java编译器（javac）。

Answer 2

以下内容应该足够了：

<强> JAVA_HOME = / usr / lib中/ JVM / JAVA -8-预言

M2_HOME = / usr / local / apache-maven / apache-maven-3.2.5

<强> PATH = $ PATH：$ JAVA_HOME / bin中

<强> PATH = $ PATH：$ M2_HOME / bin中

删除您声明的其他M2或MAVEN_HOME变量。

＆＃39;错误：未正确定义JAVA_HOME。＆＃39;在mvn命令

2 个答案: