问如何在Groovy中创建和访问全局变量？

EN

import groovy.transform.Field

var1 = 'var1'
@Field String var2 = 'var2'
def var3 = 'var3'

void printVars() {
    println var1
    println var2
    println var3 // This won't work, because not in script scope.
}

class Globals {
   static String ouch = "I'm global.."
}

println Globals.ouch

def i_am_not_global = 100 // This will not be accessible inside the function

i_am_global = 200 // this is global and will be even available inside the 

def func()
{
    log.info "My value is 200. Here you see " + i_am_global
    i_am_global = 400
    //log.info "if you uncomment me you will get error. Since i_am_not_global cant be printed here " + i_am_not_global 
}
def func2()
{
   log.info "My value was changed inside func to 400 . Here it is = " + i_am_global
}
func()
func2()