在/etc/profile加入
export JAVA_HOME=/usr/java/jdk1.6.0_06
export PATH=$JAVA_HOME/bin:$CATALINA_HOME/bin:$PATH
export TOMCAT_HOME=/software/apache-tomcat-6.0.16
export BASEDIR=/software/apache-tomcat-6.0.16
export CATALINA_BASE=/software/apache-tomcat-6.0.16
export CATALINA_HOME=/software/apache-tomcat-6.0.16
export CATALINA_TMPDIR=/software/apache-tomcat-6.0.16/temp

重启后，用java -version查看
[root@afunms bin]# java -version
java version "1.6.0_06"
Java(TM) SE Runtime Environment (build 1.6.0_06-b02)
Java HotSpot(TM) Client VM (build 10.0-b22, mixed mode, sharing)