groovy函数、字符串、循环

三重单引号字符串
  '''a triple single quoted string''' 三重单引号字符串是普通的java.lang.String

三重单引号字符串是多行的。您可以跨越行边界跨越字符串的内容,而无需将字符串拆分为多个部分,而不使用连接或换行转义字符

def aMultilineString = '''line one
    line two
    line three'''

双引号字符串

  Double quoted strings are plain java.lang.String if there’s no interpolated expression, but are groovy.lang.GString instances if interpolation is present.

字符串插值

  除了单引号和三引号字符串之外,任何Groovy表达式都可以在所有字符串文字中进行插值。插值是在对字符串求值时将字符串中的占位符替换为其值的行为。

groovy循环
  定义一个独立的repeat函数
  方法体就是一个for循环

groovy脚本形式代码

/**
 * Created by Jxy on 2018/12/19 10:32
 * 定义函数
 * 字符串
 * 字符串插值
 */

println function()
/*
定义函数
 */
def function(){
    "groovy"
}
//字符串插值
def name = 'Guillaume' // a plain string
def greeting = "Hello ${name}"

assert greeting.toString() == 'Hello Guillaume'

def sum = "The sum of 2 and 3 equals ${2 + 3}"
assert sum.toString() == 'The sum of 2 and 3 equals 5'

def person = [name: 'Guillaume', age: 36]
assert "$person.name is $person.age years old" == 'Guillaume is 36 years old'

//GString and String hashCodes
//GStrings and Strings don’t have the same hashCode.
assert "one: ${1}".hashCode() != "one: 1".hashCode()

/*
默认参数值
 */
def repeat(val, repeat=5){
    for(i in 0..<repeat){
        println val
    }
}

repeat("jser",3)//循环三次
repeat("good day")//循环默认值五次

运行结果

groovy
jser
jser
jser
good day
good day
good day
good day
good day

Process finished with exit code 0
原文地址:https://www.cnblogs.com/jsersudo/p/10147581.html