ONEKEY——安装JDK 17

# 1、环境准备

提示

支持系统：主流 Linux 发行版（Rocky、CentOS、Ubuntu、Debian 等）
权限需求：需 root 或 sudo 权限
网络：需访问清华大学开源镜像，推荐国内云主机/服务器

# 2、JDK 17 国内下载地址

警告

因为本文档与官网的版本可能有差异，需要自行访问官方，然后更换最新版本。地址如下

镜像源	版本	下载链接
清华大学	OpenJDK 17	https://mirrors.tuna.tsinghua.edu.cn/Adoptium/17/jdk/x64/linux/

阿里云、华为云目前均无 OpenJDK 17 包，清华大学镜像为最优选择。只推荐清华源

清华源

# 3、解压并安装 JDK 17

#!/bin/bash

JDK_FILE="/opt/modules/OpenJDK17U-jdk_x64_linux_hotspot_17.0.15_6.tar.gz"
JDK_HOME="/opt/modules/jdk-17.0.15"

# 目录准备
mkdir -p /opt/modules

# 下载（如无则自动拉取）
if [ ! -f "$JDK_FILE" ]; then
  echo "正在下载 JDK 17 ..."
  curl -L -o "$JDK_FILE" "https://mirrors.tuna.tsinghua.edu.cn/Adoptium/17/jdk/x64/linux/OpenJDK17U-jdk_x64_linux_hotspot_17.0.15_6.tar.gz"
else
  echo "已存在安装包：$JDK_FILE"
fi

# 解压（strip-components=1 目录扁平化，避免多重目录层）
if [ ! -d "$JDK_HOME" ]; then
  mkdir -p "$JDK_HOME"
  tar -zxvf "$JDK_FILE" -C "$JDK_HOME" --strip-components=1
else
  echo "已存在解压目录：$JDK_HOME"
fi

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笔记

脚本自动判断文件/目录是否存在，可重复执行，便于批量部署。

# 4、环境变量配置

将 JAVA_HOME 与 PATH 写入 /etc/profile，保证全局可用：

#!/bin/bash

if ! grep -q "jdk-17.0.15" /etc/profile; then
  echo "export JAVA_HOME=/opt/modules/jdk-17.0.15" | sudo tee -a /etc/profile
  echo 'export PATH=$PATH:$JAVA_HOME/bin' | sudo tee -a /etc/profile
fi

source /etc/profile
echo "JAVA_HOME 已设置为：$JAVA_HOME"

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如需局部用户可写入 ~/.bashrc，方法一致。

# 5、alternatives 多版本管理

如果服务器存在多个 Java 版本，务必用 update-alternatives 统一切换：

sudo update-alternatives --install /usr/bin/java java /opt/modules/jdk-17.0.15/bin/java 2
sudo update-alternatives --install /usr/bin/javac javac /opt/modules/jdk-17.0.15/bin/javac 2

# 可选：一键切换为默认
sudo update-alternatives --set java /opt/modules/jdk-17.0.15/bin/java
sudo update-alternatives --set javac /opt/modules/jdk-17.0.15/bin/javac

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注意

如遇 java -version 输出异常，建议优先检查 alternatives 配置是否指向正确 JDK。

# 6、一键自动化脚本

下面是一键全自动安装脚本，可复制保存为 install_jdk17.sh，适配绝大部分 Linux 服务器：

#!/bin/bash
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Author: JaneTTR

set -ex

########### JDK 版本参数区 ############

JDK_VERSION="17.0.15_6"
JDK_SHORT="17.0.15"
JDK_FILENAME="OpenJDK17U-jdk_x64_linux_hotspot_${JDK_VERSION}.tar.gz"
JDK_DOWNLOAD_URL="https://mirrors.tuna.tsinghua.edu.cn/Adoptium/17/jdk/x64/linux/${JDK_FILENAME}"
JDK_INSTALL_DIR="/opt/modules/jdk-${JDK_SHORT}"
JDK_FILE_PATH="/opt/modules/${JDK_FILENAME}"

###########JDK_INIT start

echo "############## SETUP JDK_INIT start #############"

# 解压缩函数
extract_tar_gz() {
    local file_path=$1
    local dest_dir=$2

    echo "Extracting file $file_path to directory $dest_dir..."
    mkdir -p "$dest_dir"
    tar -zxvf "$file_path" -C "$dest_dir" --strip-components=1

    if [ $? -eq 0 ]; then
        echo "File extracted successfully: $dest_dir"
    else
        echo "File extraction failed"
        exit 1
    fi
}

# 配置 JAVA_HOME 函数
configure_java_home() {
    if grep -q "^export JAVA_HOME=" /etc/profile; then
        sudo sed -i "s#^export JAVA_HOME=.*#export JAVA_HOME=${JDK_INSTALL_DIR}#" /etc/profile
    else
        echo "export JAVA_HOME=${JDK_INSTALL_DIR}" | sudo tee -a /etc/profile
    fi

    if ! grep -q "^export PATH=.*\$JAVA_HOME/bin" /etc/profile; then
        echo "export PATH=\$PATH:\$JAVA_HOME/bin" | sudo tee -a /etc/profile
    fi

    source /etc/profile
    echo "JAVA_HOME is set to: $JAVA_HOME"
}

# 检查并下载 JDK 文件
check_and_download_jdk() {
    if [ -f "$JDK_FILE_PATH" ]; then
        echo "JDK file exists: $JDK_FILE_PATH"
    else
        echo "JDK file does not exist, downloading..."
        mkdir -p "$(dirname "$JDK_FILE_PATH")"
        curl -L -o "$JDK_FILE_PATH" "$JDK_DOWNLOAD_URL"

        if [ $? -eq 0 ]; then
            echo "JDK download success: $JDK_FILE_PATH"
            extract_tar_gz "$JDK_FILE_PATH" "$JDK_INSTALL_DIR"
        else
            echo "JDK download failed!!"
            exit 1
        fi
    fi
}

# 添加并配置 update-alternatives
configure_update_alternatives() {
    sudo update-alternatives --install /usr/bin/java java ${JDK_INSTALL_DIR}/bin/java 2
    sudo update-alternatives --install /usr/bin/javac javac ${JDK_INSTALL_DIR}/bin/javac 2

    sudo update-alternatives --set java ${JDK_INSTALL_DIR}/bin/java
    sudo update-alternatives --set javac ${JDK_INSTALL_DIR}/bin/javac

    java -version
}

main() {
    check_and_download_jdk

    if [ -d "$JDK_INSTALL_DIR" ]; then
        echo "JDK home exists: $JDK_INSTALL_DIR"
    else
        extract_tar_gz "$JDK_FILE_PATH" "$JDK_INSTALL_DIR"
    fi

    configure_java_home
    configure_update_alternatives
}

main

###########JDK_INIT end

echo "############## SETUP JDK_INIT end #############"

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使用方法

保存脚本 install_jdk17.sh
执行 chmod +x install_jdk17.sh
运行 sudo ./install_jdk17.sh

#ONEKEY #JDK #安装 #配置 #OpenJDK

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