1. vi /etc/profile,添加

export JAVA_HOME=/opt/app/jdk1.7.0_01
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME$/jre/lib
pathmunge $JAVA_HOME/bin:$JAVA_HOME/jre/bin
TOMCAT_HOME=/opt/app/apache-tomcat-7.0.29

2. 测试

#echo ＄JAVA_HOME
#echo ＄CLASSPATH
#java -version