1、在/etc/rc.d/rc.local中加入:
#java environment
export JAVA_HOME=/usr/java/jdk1.8.0_161
export CLASSPATH=.:${JAVA_HOME}/jre/lib/rt.jar:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tools.jar
export PATH=$PATH:${JAVA_HOME}/bin
/home/tomcat/apache-tomcat-8.5.29/bin/startup.sh#java environme
