jdk 一键安装脚本

#! /bin/bash
 
#========================================================================
#                                快速安装JDK
#                           CentOS7 中已成功验证
#                               使用yum方式安装
#
#                            author: Somnus_小凯
#========================================================================
 
 
hasJdk(){
    RESULT=$(pgrep java)
    if [[ ! $RESULT ]]
    then
        return 0;
    fi
    return 1;
}
 
hasJdk
if [ $? != 1 ]
then
    echo "Not Found jdk"
    echo "Installing jdk..."
    yum install -y java-1.8.0-openjdk
    hasJdk
    if [ $? != 1 ]
    then
      echo "Install jdk Fail"
    fi
fi
 
java -version
echo ""