1. Upload jdk to the remote server
Can use filezilla for file upload
2. Enter the configuration file to configure
vi /etc/profile.d/java.sh
3. Add configuration information
JAVA_HOME=/usr/java/jdk1.8.0_161
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
export MAVEN_HOME=/work/maven/apache-maven-3.5.2
export PATH=${PATH}:${MAVEN_HOME}/bin
export ZOOKEEPER_INSTALL=/work/zookeeper/zookeeper-3.4.11
export PATH=$PATH:$ZOOKEEPER_INSTALL/bin
4. Save and exit
：wq
5. Load the setting information and make it effective
source /etc/profile
6. Verify that the configuration is successful
java -version
If jdk information appears, the configuration is successful