CentOS7下安装jdk1.8

第一步 安装wget

# yum install wget

第二步 下载jdk

# cd /opt/
# wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u141-b15/336fa29ff2bb4ef291e347e091f7f4a7/jdk-8u141-linux-x64.tar.gz"
# tar xzf jdk-8u141-linux-x64.tar.gz
# cd /opt/jdk1.8.0_141/
# alternatives --install /usr/bin/java java /opt/jdk1.8.0_141/bin/java 2
# alternatives --config java

There are 3 programs which provide ‘java’.

1 /opt/jdk1.7.0_71/bin/java

2 /opt/jdk1.8.0_45/bin/java

3 /opt/jdk1.8.0_91/bin/java

4 /opt/jdk1.8.0_141/bin/java

Enter to keep the current selection[+], or type selection number: 4
# alternatives --install /usr/bin/jar jar /opt/jdk1.8.0_141/bin/jar 2
# alternatives --install /usr/bin/javac javac /opt/jdk1.8.0_141/bin/javac 2
# alternatives --set jar /opt/jdk1.8.0_141/bin/jar
# alternatives --set javac /opt/jdk1.8.0_141/bin/javac
# java -version

java version “1.8.0_141”

Java(TM) SE Runtime Environment (build 1.8.0_141-b15)

Java HotSpot(TM) 64-Bit Server VM (build 25.141-b15, mixed mode)

# export JAVA_HOME=/opt/jdk1.8.0_141
# export JRE_HOME=/opt/jdk1.8.0_141/jre
# export PATH=$PATH:/opt/jdk1.8.0_141/bin:/opt/jdk1.8.0_141/jre/bin