Groovy安装以及简单使用

首先到官网 http://groovy.codehaus.org/Download下载个groovy安装文件
Download Windows-Installer
安装文件，安装成功后重启你的电脑，进入dos中 输入groovy，打印信息说明安装成功
输入groovyConsole 会弹出它的控制台，可进行代码的编写

def name="world" ;
println "hello $name";
class Greet{
     def name;
     Greet(who){
     name=who[0].toUpperCase() + who[1..-1];
     }
     def salute(){
     println "hello $name";
     }
}
g = new Greet('world');
g.salute();

groovy 在eclipse3.7中使用

下载个eclipse groovy插件
http://dist.springsource.org/release/GRECLIPSE/e3.7/archive-2.6.0.xx-20111212-0900-e37-RELEASE.zip

将解压的文件放到eclipse下的dropins中去
启动eclipse
新建个groovy project
将groovy需要的lib导入项目中去
再新建个groovy class

package com.depin.test

class Greet {
	def name;
	Greet(who){
	name=who[0].toUpperCase() + who[1..-1];
	}
	def salute(){
	println "hello $name";
	} 

}
package com.depin.test

class HelloWorld {

	static main(args) {
	  new Greet('world').salute();
	}

}

下面的是一些简单的用法

1 内容简介

主要介绍了groovy的常用语法，以便快速上手应用.

2 语法介绍

2.1 屏幕输出

println “Hello world!”

println “Hello” + “ world!”

2.2 变量定义

class HelloWorld {

staticvoid main(args) {

def myString = new String("test String")

def myObject = new Object()

int myInt = 8

myObject = 3

println"myString=" + myString

println"myObject=" + myObject

println"myInt=" + myInt

}

}

2.3 类定义，函数定义

class HelloWorld {

defvoidtest(){

println"this is test func"

}

def String getString(String input){

println"input=" + input

return"hello," + input

}

staticvoid main(args) {

def hw = new HelloWorld()

hw.test()

println hw.getString("Liuyou")

}

}

2.4 list用法

class HelloWorld {

staticvoid main(args) {

//ArrayList可以动态增加大小

def arrayList = new ArrayList()

arrayList[0] = "dog"

arrayList[1] = "cat"

arrayList[2] = "bird"

for(l in arrayList){

println l + " "

}

//list，不可以动态增加大小

def list = [ "dog", "cat", "bird" ]

for(l in list){

println l + " "

}

//list array

def lists = [[ "liuyou", "22", "M"],["liudehua", "33", "M"]]

for(l in lists){

println l[0] + "-" + l[1] + "-" + l[2]

}

for(l in lists){

for(e in l){

println e

}

}

}

}

2.5 map用法

class HelloWorld {

staticvoid main(args) {

//显示定义map

def map = new HashMap()

map.put("ID", 12345)

map.put("name", "Liuyou")

map.put("email", "[email protected]")

println map.get("ID") + "/" + map.get("name") + "/" + map.get("email")

//隐示定义map

def map2 = ["email":"[email protected]", "name":"Liuyou", "ID":12345]

println map.get("ID") + "/" + map.get("name") + "/" + map.get("email")

}

}

2.6 逻辑语句

2.6.1 if…else…

class HelloWorld {

staticvoid main(args) {

def s = "1234"

if(s == "1234") println"yes,it is 1234"

def n = 1234

if(n == 123) println"yes, n is 123"

elseif(n == 12) println"yes, n is 12"

elseif(n == 1234) println"yes, n is 1234"

elseprintln"yes, n is null"

}

}

2.6.2 switch…case…

class HelloWorld {

staticvoid main(args) {

def s = "1234"

switch(s){

case"1":

println"1";

break;

case"2":

println"2";

break;

case"1234":

println"1234"

break;

default:

println"default"

break;

}

}

}

2.6.3 while循环

class HelloWorld {

staticvoid main(args) {

int n = 10

while(n){

println"n=" + n

n --

}

}

}

2.6.4 for循环

class HelloWorld {

staticvoid main(args) {

def n = [10,20,30]

for(e in n){

println"e=" + e

}

}

}

2.7 try…catch…异常语句

class HelloWorld {

defvoid testException(){

try{

def n = 0;

def m = 2;

def l = m/n

}catch(Exception e){

println e.toString()

}

}

defvoid testThrow(){

thrownew java.lang.ArithmeticException()

}

staticvoid main(args) {

def hw = new HelloWorld()

//除法零异常

hw.testException()

//主动抛出异常

try{

hw.testThrow()

}catch(ArithmeticException e){

println e.toString()

}

}

}