/etc/profile中加入以下代码 JAVA_HOME为JDK包解压的路径export JAVA_HOME=/home/exayong/jvm/jdk1.8.0_111 export JRE_HOME=${JAVA_HOME}/jre export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib export PATH=${JAVA_HOME}/bin:$PATH