安装JDK

rpm安装
[root@centos8 ~]#ls -lh jdk-8u241-linux-x64.rpm
-rw-r--r-- 1 root root 171M Feb  8 18:29 jdk-8u241-linux-x64.rpm

#安装jdk，无相关依赖包
[root@centos8 ~]#dnf -y install jdk-8u241-linux-x64.rpm
[root@centos8 ~]#java -version
java version "1.8.0_241"
Java(TM) SE Runtime Environment (build 1.8.0_241-b07)
Java HotSpot(TM) 64-Bit Server VM (build 25.241-b07, mixed mode)
#初始化环境变量
[root@centos8 ~]#vim /etc/profile.d/jdk.sh
[root@centos8 ~]#cat /etc/profile.d/jdk.sh
export JAVA_HOME=/usr/java/default
export PATH=$JAVA_HOME/bin:$PATH
#以下两项非必须项
  export JRE_HOME=$JAVA_HOME/jre
  export CLASSPATH=$JAVA_HOME/lib/:$JRE_HOME/lib/


  [root@centos8 ~]#. /etc/profile.d/jdk.sh   #运行




 




二进制文件安装
[root@centos8 ~]#tar xvf jdk-8u241-linux-x64.tar.gz -C /usr/local/
[root@centos8 ~]#cd /usr/local/
[root@centos8 ~]#ln -s jdk1.8.0_241/ jdk
#初始化环境变量
[root@centos8 ~]#vim /etc/profile.d/jdk.sh
[root@centos8 ~]#cat /etc/profile.d/jdk.sh 
export JAVA_HOME=/usr/local/jdk
export PATH=$PATH:$JAVA_HOME/bin
#以下两项非必须项
#export JRE_HOME=$JAVA_HOME/jre 
#export CLASSPATH=.:$JAVA_HOME/lib/:$JRE_HOME/lib/
[root@centos8 ~]#. /etc/profile.d/jdk.sh
#注意:JAVA_HOME变量必须设置,否则tomcat启动时会出下面错误
[root@centos8 ~]#catalina.sh
Neither the JAVA_HOME nor the JRE_HOME environment variable is defined
At least one of these environment variable is needed to run this program
[root@centos8 ~]#startup.sh 
Neither the JAVA_HOME nor the JRE_HOME environment variable is defined
At least one of these environment variable is needed to run this program

#验证安装
[root@centos8 ~]#java -version
java version "1.8.0_241"
Java(TM) SE Runtime Environment (build 1.8.0_241-b07)
Java HotSpot(TM) 64-Bit Server VM (build 25.241-b07, mixed mode)
[root@centos8 ~]#which java
/usr/local/jdk/bin/java




 




一键安装二进制的JDK
[root@ubuntu1804 ~]#vim install_jdk.sh
JDK_FILE="jdk-11.0.15.1_linux-x64_bin.tar.gz"
#JDK_FILE="jdk-11.0.12_linux-x64_bin.tar.gz"
#JDK_FILE="jdk-8u301-linux-x64.tar.gz"

JDK_DIR="/usr/local"

DIR=`pwd`

color () {
    RES_COL=60
    MOVE_TO_COL="echo -en \\033[${RES_COL}G"
    SETCOLOR_SUCCESS="echo -en \\033[1;32m"
    SETCOLOR_FAILURE="echo -en \\033[1;31m"
    SETCOLOR_WARNING="echo -en \\033[1;33m"
    SETCOLOR_NORMAL="echo -en \E[0m"
    echo -n "$2" && $MOVE_TO_COL
    echo -n "["
    if [ $1 = "success" -o $1 = "0" ] ;then
        ${SETCOLOR_SUCCESS}
        echo -n $"  OK  "    
    elif [ $1 = "failure" -o $1 = "1"  ] ;then
        ${SETCOLOR_FAILURE}
        echo -n $"FAILED"
    else
        ${SETCOLOR_WARNING}
        echo -n $"WARNING"
    fi
    ${SETCOLOR_NORMAL}
    echo -n "]"
    echo                                                                                                                              
}

install_jdk(){
if !  [  -f "$DIR/$JDK_FILE" ];then
    color 1  "$JDK_FILE 文件不存在" 
    exit; 
elif [ -d $JDK_DIR/jdk ];then
        color 1  "JDK 已经安装" 
    exit
else 
        [ -d "$JDK_DIR" ] || mkdir -pv $JDK_DIR
fi
tar xvf $DIR/$JDK_FILE  -C $JDK_DIR
cd  $JDK_DIR && ln -s jdk* jdk 

cat >  /etc/profile.d/jdk.sh <<EOF
export JAVA_HOME=$JDK_DIR/jdk
export PATH=\$PATH:\$JAVA_HOME/bin
#export JRE_HOME=\$JAVA_HOME/jre
#export CLASSPATH=.:\$JAVA_HOME/lib/:\$JRE_HOME/lib/
EOF
.  /etc/profile.d/jdk.sh
java -version && color 0  "JDK 安装完成" || { color 1  "JDK 安装失败" ; exit; }

}

install_jdk




 




安装openjdk

yum install java-11-openjdk
yum install java-1.6.0-openjdk
yum install java-1.7.0-openjdk
yum install java-1.8.0-openjdk




 








            

            
posted @ 
2023-06-14 17:34 
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