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                > 1.首先查看mac上是否安裝了JDK,在終端輸入指令 java -version,如果輸出為No Java runtime present, requesting install.那么就說明你過沒有安裝JDK,需要先安裝JDK。下載jdk的網址是 ``` https://www.oracle.com/java/technologies/javase/javase9-archive-downloads.html ``` > 2.下載完成之后安裝到mac上,這個時候在終端再次輸入指令java -version ,如果輸出的是jdk的版本信息 ``` java version "12.0.2" 2019-07-16 Java(TM) SE Runtime Environment (build 12.0.2+10) Java HotSpot(TM) 64-Bit Server VM (build 12.0.2+10, mixed mode, sharing) ``` > 3、配置java環境 * [ ] 1. 打開java安裝路徑 Mac默認路徑為/Library/Java/JavaVirtualMachines/ * [ ] 2. 按住command鍵加空格,搜索java默認路徑 ![](https://img.kancloud.cn/95/04/9504beaaf8248396eec1b4f2f1d03225_659x238.png) * [ ] 3.在Home文件夾處右擊——服務——新建位于文件夾位置的終端窗口 ![](https://img.kancloud.cn/c0/1f/c01f7fccaa117b14735bd18246548632_630x516.png) ![](https://img.kancloud.cn/1f/f5/1ff5ab5f6b9ebc52d6c6eee552eed20c_641x255.png) * [ ] 4.輸入sudo -i vi /etc/.bash\_profile命令,并回車 ![](https://img.kancloud.cn/3d/cc/3dcc2e3a5a50328d054d1cc77c40fe2f_637x164.png) * [ ] 5、輸入密碼并回車,在彈出的頁面中按 i 鍵開始輸入以下內容 ``` JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/ CLASSPAHT=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar PATH=$JAVA_HOME/bin:$PATH: export JAVA_HOME export CLASSPATH export PATH ``` 完成后按esc鍵退出編輯,再輸入:wq 保存剛剛的操作 輸入source /etc/.bash\_profile并回車,使配置生效 * [ ] 6.檢查java環境是否配置成功 輸入指令echo $JAVA\_HOME,如果輸出結果類似如下 ``` /Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home ~~~ ```
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