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install_java17.sh

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+#!/bin/bash
+
+# Java 17 安装脚本
+# 提供多个下载源选项
+
+set -e
+
+JAVA_VERSION="17.0.12"
+JAVA_DIR="/opt/java17"
+INSTALL_DIR="$HOME"
+
+echo "=========================================="
+echo "Java 17 安装脚本"
+echo "=========================================="
+
+# 检查是否已安装 Java 17
+if [ -d "$JAVA_DIR" ] && [ -f "$JAVA_DIR/bin/java" ]; then
+    CURRENT_VERSION=$($JAVA_DIR/bin/java -version 2>&1 | head -1)
+    if echo "$CURRENT_VERSION" | grep -q "17"; then
+        echo "Java 17 已安装: $CURRENT_VERSION"
+        echo "配置为默认版本..."
+        sudo alternatives --install /usr/bin/java java $JAVA_DIR/bin/java 2
+        sudo alternatives --install /usr/bin/javac javac $JAVA_DIR/bin/javac 2
+        sudo alternatives --config java <<< "2"
+        java -version
+        exit 0
+    fi
+fi
+
+# 下载选项
+echo "请选择下载源："
+echo "1. GitHub (Adoptium) - 需要良好的网络连接"
+echo "2. 手动下载后安装"
+echo "3. 使用系统包管理器（如果可用）"
+read -p "请选择 (1-3): " choice
+
+case $choice in
+    1)
+        echo "正在从 GitHub 下载 Java 17..."
+        cd $INSTALL_DIR
+        URL="https://github.com/adoptium/temurin17-binaries/releases/download/jdk-${JAVA_VERSION}%2B7/OpenJDK17U-jdk_x64_linux_hotspot_${JAVA_VERSION}_7.tar.gz"
+        wget "$URL" -O java17.tar.gz || {
+            echo "下载失败，请尝试其他选项"
+            exit 1
+        }
+        ;;
+    2)
+        echo "请手动下载 Java 17 并保存为 java17.tar.gz"
+        echo "下载地址: https://adoptium.net/zh-CN/temurin/releases/?version=17"
+        read -p "下载完成后，请将文件放在 $INSTALL_DIR/java17.tar.gz，然后按回车继续..."
+        if [ ! -f "$INSTALL_DIR/java17.tar.gz" ]; then
+            echo "错误: 未找到 java17.tar.gz 文件"
+            exit 1
+        fi
+        ;;
+    3)
+        echo "尝试使用系统包管理器..."
+        # 检查是否有可用的 Java 17 包
+        if yum list available | grep -q "java-17"; then
+            sudo yum install -y java-17-openjdk java-17-openjdk-devel
+            sudo alternatives --config java
+            java -version
+            exit 0
+        else
+            echo "系统仓库中没有 Java 17，请选择其他选项"
+            exit 1
+        fi
+        ;;
+    *)
+        echo "无效选择"
+        exit 1
+        ;;
+esac
+
+# 解压和安装
+echo "正在解压..."
+cd $INSTALL_DIR
+tar -xzf java17.tar.gz
+
+echo "正在安装到 $JAVA_DIR..."
+sudo mkdir -p $JAVA_DIR
+sudo mv jdk-${JAVA_VERSION}+7/* $JAVA_DIR/
+sudo chown -R root:root $JAVA_DIR
+
+# 配置 alternatives
+echo "配置 Java 17 为默认版本..."
+sudo alternatives --install /usr/bin/java java $JAVA_DIR/bin/java 2
+sudo alternatives --install /usr/bin/javac javac $JAVA_DIR/bin/javac 2
+
+# 选择 Java 17
+echo "2" | sudo alternatives --config java > /dev/null 2>&1 || {
+    echo "请手动选择 Java 17:"
+    sudo alternatives --config java
+}
+
+# 验证安装
+echo ""
+echo "=========================================="
+echo "安装完成！"
+echo "=========================================="
+java -version
+echo ""
+echo "Java 17 已安装到: $JAVA_DIR"
+echo "现在可以继续安装 Gerrit 了！"
+
+