檢查Linux版本
root@www:~# hostnamectlStatic hostname: www.0x88.comIcon name: computer-vmChassis: vmMachine ID: 30fa955a36be492ca459599ef20bc508Boot ID: 37084dbe36f44adaa075e8f9a98f132eVirtualization: kvm
Operating System: Ubuntu 22.04.5 LTSKernel: Linux 5.15.0-125-genericArchitecture: x86-64
檢查Java環境
root@www:~# java -version
openjdk version "21.0.6" 2025-01-21
OpenJDK Runtime Environment (build 21.0.6+7-Ubuntu-122.04.1)
OpenJDK 64-Bit Server VM (build 21.0.6+7-Ubuntu-122.04.1, mixed mode, sharing)
如果沒有安裝Java的話，請執行如下命令：
apt-get install openjdk-21-jdk
如果需要檢查可安裝的Java的話，請執行如下指令
root@www:~# apt-cache search java
找到 JDK 的實際安裝路徑
root@www:~# update-alternatives --display java
java - auto modelink best version is /usr/lib/jvm/java-21-openjdk-amd64/bin/javalink currently points to /usr/lib/jvm/java-21-openjdk-amd64/bin/javalink java is /usr/bin/javaslave java.1.gz is /usr/share/man/man1/java.1.gz
/usr/lib/jvm/java-21-openjdk-amd64/bin/java - priority 2111slave java.1.gz: /usr/lib/jvm/java-21-openjdk-amd64/man/man1/java.1.gz
查看 /usr/bin/java 的實際鏈接
root@www:~# ls -l /usr/bin/java
lrwxrwxrwx 1 root root 22 Feb 17 16:18 /usr/bin/java -> /etc/alternatives/java
查看 /etc/alternatives/java 的鏈接
root@www:~# ls -l /etc/alternatives/java
lrwxrwxrwx 1 root root 43 Feb 17 16:18 /etc/alternatives/java -> /usr/lib/jvm/java-21-openjdk-amd64/bin/java
臨時設置 JAVA_HOME（僅對當前終端會話有效）
export JAVA_HOME=/usr/lib/jvm/java-21-openjdk-amd64
export PATH=$JAVA_HOME/bin:$PATH
永久設置 JAVA_HOME（對所有終端會話有效）
echo "export JAVA_HOME=/usr/lib/jvm/java-21-openjdk-amd64" >> ~/.bashrc
echo "export PATH=\$JAVA_HOME/bin:\$PATH" >> ~/.bashrc
重新加載配置文件
source ~/.bashrc
驗證設置
root@www:~# echo $JAVA_HOME
/usr/lib/jvm/java-21-openjdk-amd64root@www:~# $JAVA_HOME/bin/java -version
openjdk version "21.0.6" 2025-01-21
OpenJDK Runtime Environment (build 21.0.6+7-Ubuntu-122.04.1)
OpenJDK 64-Bit Server VM (build 21.0.6+7-Ubuntu-122.04.1, mixed mode, sharing)
安裝 SDKMAN
安裝
root@www:~# curl -s "https://get.sdkman.io" | bash
如果安裝失敗的話，換時間，多試幾次。
生效
source "/root/.sdkman/bin/sdkman-init.sh"
檢查
root@www:~# sdk versionSDKMAN!
script: 5.19.0
native: 0.5.0
安裝gradle
root@www:~# sdk install gradleDownloading: gradle 8.12.1In progress...###########################
下載的包比較大，需要耐心多等一會兒。
檢查gradle
root@www:~# gradle -vWelcome to Gradle 8.12.1!Here are the highlights of this release:- Enhanced error and warning reporting with the Problems API- File-system watching support on Alpine Linux- Build and test Swift 6 libraries and appsFor more details see https://docs.gradle.org/8.12.1/release-notes.html------------------------------------------------------------
Gradle 8.12.1
------------------------------------------------------------Build time: 2025-01-24 12:55:12 UTC
Revision: 0b1ee1ff81d1f4a26574ff4a362ac9180852b140Kotlin: 2.0.21
Groovy: 3.0.22
Ant: Apache Ant(TM) version 1.10.15 compiled on August 25 2024
Launcher JVM: 21.0.6 (Ubuntu 21.0.6+7-Ubuntu-122.04.1)
Daemon JVM: /usr/lib/jvm/java-21-openjdk-amd64 (no JDK specified, using current Java home)
OS: Linux 5.15.0-125-generic amd64
測試
創建build.gradle文件
vi build.gradle
里面填寫如下內容
task hello {doLast {println 'Hello, Gradle!'}
}
保存，退出vi
執行如下指令
root@www:~# gradle -q hello
Hello, Gradle!
刪除build.gradle文件
rm build.gradle
創建 build.gradle.kts文件，添加內容如下
task("hello") {doLast {println("Hello, kotlin Gradle!")}
}
執行如下指令
root@www:~# gradle -q hello
Hello, kotlin Gradle!
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