Groovy安装与入门实例

1 Groovy是什么？

来看下官网的介绍：http://groovy.codehaus.org

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Groovy...

· is an agile and dynamic language for the Java Virtual Machine
· builds upon the strengths of Javabut has additionalpower features inspiredby languages like Python, Ruby and Smalltalk
· makes modern programming features available to Java developers with almost-zero learning curve
· provides the ability to statically type check and staticallycompile your codefor robustness and performance
· supports Domain-Specific Languages and other compact syntax so your codebecomes easyto read and maintain
· makes writing shell and buildscripts easy with its powerfulprocessing primitives, OO abilities and an Ant DSL
· increases developer productivity by reducing scaffolding code when developing web, GUI, database orconsole applications
· simplifies testing bysupporting unit testing and mocking out-of-the-box
· seamlessly integrates with all existingJava classes and libraries
· compiles straight to Java bytecodeso you can use it anywhere you can use Java
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通过支持DSL提高代码可读性和可维护性

减少开始Web、GUI、数据库、控制台应用程序时的脚手架代码

简化单元测试和Mock技术

与Java类包无缝集成

2 Groovy环境安装

下面是官方文档中摘取的安装步骤。适用于Linux系统或Cygwin模拟环境。如果是Windows平台的话，也可以直接下载Windows installer一键安装。

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GVM (the GroovyenVironment Manager)
This tool makesinstalling Groovy on any Bash platform (Mac OSX, Linux, Cygwin, Solaris orFreeBSD) very easy.
Simply open a newterminal and enter:

$ curl -s get.gvmtool.net | bash

Follow theinstructions on-screen to complete installation.
Open a newterminal or type the command:

$ source "$HOME/.gvm/bin/gvm-init.sh"

Then install thelatest stable Groovy:

$ gvm install groovy

After installationis complete and you've made it your default version, test it with:

$ groovy -version

That's all thereis to it!
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下面来亲自体验一下，然后编写个Groovy版的Hello World测试一下。



$ curl –s get.gvmtool.net | bash





之后执行初始化脚本，也可以将这句命令加入到~/.bashrc中。



$ source "/cygdrive/c/Users/daichen/.gvm/bin/gvm-init.sh"



编写一个Hello World试一下吧。



helloworld.groovy

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class Test {

def text = “helloworld!!!”

}

print new Test().getText()

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$ groovy helloworld.groovy

hello world!!!

3 Groovy-Eclipse插件安装

在Help -> Install New Software下输入http://dist.springsource.org/release/GRECLIPSE/e3.6

选择Groovy-Eclipse (Required) 进行安装。



可以新建Groovy项目，或者在已有项目中新加Groovy Class，就会自动开启此项目上的Groovy Nature属性。这样普通Java代码就与Groovy代码融合在一起了。