centos 7 安装 jdk 的脚本文件

#!/bin/bash

# 1. Check if Java is installed
if type -p java; then
    echo "Java has been installed."
    exit 0
else
    # 2. Install Java
    # 检查是否提供了Java安装包的路径
    if [ -z "$1" ]; then
        echo "Usage: $0 [path_to_jdk_tar.gz]"
        exit 1
    elif [ ! -f "$1" ]; then
        echo "The file does not exist."
        exit 1
    fi

    mkdir -p /opt/java/
    # 使用提供的路径解压文件
    tar -zxvf "$1" -C /opt/java/

    # 3. Configure environment variables
    echo "JAVA_HOME=/opt/java/jdk1.8.0_333
    PATH=\$JAVA_HOME/bin:\$PATH
    CLASSPATH=\$JAVA_HOME/jre/lib/ext:\$JAVA_HOME/lib/tools.jar
    export PATH JAVA_HOME CLASSPATH" >> /etc/profile

    source /etc/profile
    echo "Setting path successful."

    java -version
    echo "Installation successful."
fi