Java JDK environment variable standard configuration

1. Environment variable Configuration

Environment variables Detailed Description:

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JDK Installation path:

Some people are installed in:

/usr/local/java/jdk

Some are installed in:

/usr/java/jdk

So export java_home See the path to installing JAVA JDK

Can be configured according to the installation path

Export Java_home=/usr/local/java/jdkexport JAVA_HOME=/USR/JAVA/JDK

Java environment variable----requires only JRE

Vi/etc/profile

#set java environmentexport java_home=/usr/java/jdkexport jre_home= $JAVA _home/jreexport classpath=.: $JAVA _home/lib/ Dt.jar: $JAVA _home/lib/tools.jarexport path= $PATH: $JAVA _home/bin: $JRE _home/bin

Source/etc/profile

2. $jre_home/bin/java before executing Java commands in shell scripts

Run Java command with JRE, minimize

Shell script part content #set java environment#export java_home=/usr/local/java/jdkexport java_home=/usr/java/jdkexport JRE_HOME= $JAVA _home/jre# Execute JAVA command 1:nohup $JRE _home/bin/java-xms256m-xmx512m-jar $JAR _name >/dev/null 2>&1 Execute Java Command 1: $JRE _home/bin/java $JAVA _opts-jar-dconf.path=file:conf/$prog

The script illustrates the following:

#!/bin/sh## java envexport java_home=/usr/local/java/jdk1.7.0_72export jre_home= $JAVA _home /jre## service nameapp_name=userservice_dir=/home/wusc/edu/service/$APP _nameservice_name= edu-service-$APP _namejar_name= $SERVICE _name\.jarpid= $SERVICE _name\.pidcd  $SERVICE _dircase  "$"   In    start)         nohup  $JRE _home/bin/java  -Xms256m -Xmx512m -jar  $JAR _name >/dev/null 2>&1 &         echo $! >  $SERVICE _dir/$PID          echo  "=== start  $SERVICE _name"          ;;     stop)         kill  ' cat  $SERVICE _dir/ $PID '         rm -rf  $SERVICE _dir/$PID          echo  "=== stop  $SERVICE _name"         sleep  5#### edu-service-aa.jar## edu-service-aa-bb.jar         p_id= ' ps -ef | grep -w  "$SERVICE _name"  | grep -v  "grep"  | awk  ' {print $2} '         if [  ' $P _id '  ==  ""  ]; then            echo   "===  $SERVICE _name process not exists or stop success"          else             echo  "===  $SERVICE _name process pid is: $P _id"              echo  "=== begin kill  $SERVICE _name process,  pid is: $P _id " &NBsp;          kill -9  $P _id         fi        ;;     restart)         $0 stop         sleep 2        $0 start         echo  "=== restart  $SERVICE _name"          ;;     *)         ## restart         $0 stop        sleep 2         $0 start        ;; Esacexit 0

Java JDK environment variable standard configuration