需求

為了開發(fā)需要，需要在一臺(tái)macbook上安裝多個(gè)jdk，提供示例舉一反三

JDK安裝

直接官網(wǎng)上下載不同版本即可
下載地址：https://www.oracle.com/java/technologies/java-se-glance.html

查看多個(gè)jdk版本

命令如下

/usr/libexec/java_home -V

查詢本機(jī)結(jié)果如下：

Matching Java Virtual Machines (4):
    17.0.2 (x86_64) "Oracle Corporation" - "Java SE 17.0.2" /Library/Java/JavaVirtualMachines/jdk-17.0.2.jdk/Contents/Home
    11.0.14 (x86_64) "Oracle Corporation" - "Java SE 11.0.14" /Library/Java/JavaVirtualMachines/jdk-11.0.14.jdk/Contents/Home
    1.8.321.07 (x86_64) "Oracle Corporation" - "Java" /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
    1.8.0_311 (x86_64) "Oracle Corporation" - "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_311.jdk/Contents/Home
/Library/Java/JavaVirtualMachines/jdk-17.0.2.jdk/Contents/Home

配置并切換多JDK示例

# java

export JAVA_8_HOME="/Library/Java/JavaVirtualMachines/jdk1.8.0_311.jdk/Contents/Home"
export JAVA_11_HOME="/Library/Java/JavaVirtualMachines/jdk-11.0.14.jdk/Contents/Home"
export JAVA_17_HOME="/Library/Java/JavaVirtualMachines/jdk-17.0.2.jdk/Contents/Home"

alias jdk8="export JAVA_HOME=$JAVA_8_HOME"
alias jdk11="export JAVA_HOME=$JAVA_11_HOME"
alias jdk17="export JAVA_HOME=$JAVA_17_HOME"

export JAVA_HOME=$JAVA_8_HOME
export PATH="$JAVA_HOME:$PATH"

至此，默認(rèn)為Jdk8，需要切換的時(shí)候，在命令行輸入jdk11或jdk17即可完成對應(yīng)版本的切換。
是不是很爽

附贈(zèng)福利

如何刪除呢

刪除指定版本

sudo rm -rf /Library/Java/JavaVirtualMachines/jdk1.8.0_311.jdk

暴力模式，全部刪除

sudo rm -rf /Library/Java/JavaVirtualMachines/

刪除掉安裝的控制臺(tái)

sudo rm -fr /Library/Internet Plug-Ins/JavaAppletPlugin.plugin 
sudo rm -fr /Library/PreferencesPanes/JavaControlPanel.prefpane

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