java - 如何检查Java，Maven，Gradle的版本

Question

如何检查机器上安装的Java，Maven，Gradle和NodeJ的版本，以及如何为所有这些构建工具或JDK设置环境变量？

Answer 1

转到您的CMD(对于Windows)或Shell终端(对于linux / ubuntu)

要检查安装的Java版本和编译器版本:

C:\>java -version
java version "1.7.0_71"
Java(TM) SE Runtime Environment (build 1.7.0_71-b14)
Java HotSpot(TM) 64-Bit Server VM (build 24.71-b01, mixed mode)

在这里您可以检查编译器版本

C:\>javac -version
    javac 1.7.0_71

要检查安装的Maven版本:使用(mvn -v或mvn版本)

C:\>mvn -v
Apache Maven 3.2.5 (12a6b3acb947671f09b81f49094c53f426d8cea1; 2014-12-14T22:59:23+05:30)
Maven home: C:\apache-maven-3.2.5
Java version: 1.7.0_71, vendor: Oracle Corporation
Java home: C:\Program Files\Java\jdk1.7.0_71\jre
Default locale: en_US, platform encoding: Cp1252
OS name: "windows 7", version: "6.1", arch: "amd64", family: "windows"

要检查已安装的Gradle版本:

C:\>gradle -version

    ------------------------------------------------------------
    Gradle 2.2.1
    ------------------------------------------------------------

    Build time:   2014-11-24 09:45:35 UTC
    Build number: none
    Revision:     6fcb59c06f43a4e6b1bcb401f7686a8601a1fb4a

    Groovy:       2.3.6
    Ant:          Apache Ant(TM) version 1.9.3 compiled on December 23 2013
    JVM:          1.7.0_71 (Oracle Corporation 24.71-b01)
    OS:           Windows 7 6.1 amd64

要检查安装的节点版本:

C:\>node -v

v0.12.0

设置环境变量

1)JAVA

Windows: Set the environment variable JAVA_HOME to C:\Program Files\Java\jdk1.6.0_21

Linux: export JAVA_HOME=/usr/local/java-current

2)Maven
(在此处提取分布(您可以在任何位置提取内容)

Windows:  C:\Program Files\Apache Software Foundation\apache-maven-3.2.1
Linux: /usr/local/apache-maven

视窗:-

M2_HOME=C:\Program Files\Apache Software Foundation\apache-maven-2.2.1
M2=%M2_HOME%\bin
MAVEN_OPTS=-Xms256m -Xmx512m

Linux:
打开命令终端并设置环境变量。

export M2_HOME=/usr/local/apache-maven/apache-maven-2.2.1
export M2=$M2_HOME/bin
export MAVEN_OPTS=-Xms256m -Xmx512m

3)