linux 安装java jdk

1、检查一下系统中的jdk版本

[root@localhost software]# java -version

显示：

openjdk version "1.8.0_102" OpenJDK Runtime Environment (build 1.8.0_102-b14) OpenJDK 64-Bit Server VM (build 25.102-b14, mixed mode)

2、检测jdk安装包

[root@localhost software]# rpm -qa | grep java

显示：

java-1.7.0-openjdk-1.7.0.111-2.6.7.8.el7.x86_64 python-javapackages-3.4.1-11.el7.noarch tzdata-java-2016g-2.el7.noarch javapackages-tools-3.4.1-11.el7.noarch java-1.8.0-openjdk-1.8.0.102-4.b14.el7.x86_64 java-1.8.0-openjdk-headless-1.8.0.102-4.b14.el7.x86_64 java-1.7.0-openjdk-headless-1.7.0.111-2.6.7.8.el7.x86_64

3、卸载openjdk

[root@localhost software]# rpm -e --nodeps tzdata-java-2016g-2.el7.noarch [root@localhost software]# rpm -e --nodeps java-1.7.0-openjdk-1.7.0.111-2.6.7.8.el7.x86_64 [root@localhost software]# rpm -e --nodeps java-1.7.0-openjdk-headless-1.7.0.111-2.6.7.8.el7.x86_64 [root@localhost software]# rpm -e --nodeps java-1.8.0-openjdk-1.8.0.102-4.b14.el7.x86_64 [root@localhost software]# rpm -e --nodeps java-1.8.0-openjdk-headless-1.8.0.102-4.b14.el7.x86_64

或者使用

[root@localhost jvm]# yum remove *openjdk*

之后再次输入rpm -qa | grep java 查看卸载情况：

[root@localhost software]# rpm -qa | grep java python-javapackages-3.4.1-11.el7.noarch javapackages-tools-3.4.1-11.el7.noarch

4、安装新的jdk

[root@localhost software]# ll total 181192 1 root root 185540433 May 20 2017 jdk-8u131-linux-x64.tar.gz

解压 jdk-8u131-linux-x64.tar.gz安装包

[root@localhost software]# mkdir -p /usr/local/java [root@localhost software]# mv jdk-8u131-linux-x64.tar.gz /usr/local/java [root@localhost software]# tar -zxvf jdk-8u131-linux-x64.tar.gz [root@localhost software]# ln -s jdk1.8.0_131 jdk

5、设置环境变量

[root@localhost software]# vim /etc/profile

在最前面添加：

export JAVA_HOME=/usr/local/java/jdk1.8.0_211 export JRE_HOME=${JAVA_HOME}/jre export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib export PATH=${JAVA_HOME}/bin:$PATH

6、执行profile文件

[root@localhost software]# source /etc/profile

7、检查新安装的jdk

[root@localhost software]# java -version

显示：

java version "1.8.0_131" Java(TM) SE Runtime Environment (build 1.8.0_131-b11) Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)

转载于:https://www.cnblogs.com/leolzi/p/11001979.html