Groovy Start
基于Java的面向对象语言
2007年1月发布了1.0版本。2.4作为当前主要版本。
Groovy对于Java开发人员来说很简单，因为Java和Groovy的语法非常相似
接下来来看看一些基本的语法：
class Test {
static void main(String[] args) {
println("I am Main");
// testString("content here~")
// testArr()
// testForIn()
// testMap()
// testDefault("test")
// testFile()
// testFile2()
// testFile3()
// testFile4()
// testFile5()
// testArray()
// testArray2()
// testRegex()
testEntity()
}
static def testString(String content) {
def test = "hello world!"
println(test)
println(content)
}
static def testArr(){
def range=5..10
println(range.get(4))
// println(range.get(6))
}
static def testForIn(){
int[] range = [0,3,6,1,7,29,9823,982134]
for(data in range){
println(data)
}
}
static def testMap(){
def employee = ['test1':1,'test2':'666','test3':4]
for(data in employee){
println(data)
}
employee.put("new1",1)
println(employee.size())
}
static def testDefault(var1,var2=2,var3="3"){
println(var1)
println(var2)
println(var3)
}
static def testFile(){
new File("/Users/chenzy/Downloads/untitled.groovy").eachLine {s -> println "line: $s"}
}
static def testFile2(){
File file = new File("/Users/chenzy/Downloads/untitled.groovy")
println file.text
}
static def testFile3(){
new File("/Users/chenzy/Downloads/untitled.groovy").withWriter("utf-8"){writer->
writer.writeLine("test insert")
}
File file = new File("/Users/chenzy/Downloads/untitled.groovy")
println file.text
}
static def testFile4(){
File file = new File("/Users/chenzy/Downloads/untitled.groovy")
println "file path : ${file.absolutePath}, file size : ${file.length()}"
}
static def testFile5(){
def target = new File("/Users/chenzy/Downloads/untitled2.groovy")
if(!target.exists()){
target.createNewFile()
}
def source = new File("/Users/chenzy/Downloads/untitled.groovy")
target << source.text
println target.text
}
static def testArray(){
def arr1=[1,2,3,4]
def arr2 = ["5","6","7"]
def arr3 = arr1.plus(arr2)
arr3.forEach({ data -> println data })
}
static def testArray2(){
def arr1=[1,2,3,4,"5","6"]
def arr2 = ["5","6","7"]
def arr3 = arr1.minus(arr2)
arr3.forEach({ data -> println data })
}
static def testRegex(){
def regex = ~"Gro{2}vy"
println regex.matcher("Grovy").matches()
}
static def testEntity(){
def user = new User()
user.setUserId(1)
user.setUserName("testUser")
println user.toString()
}
}
