package variable
//list定义方式,默认list是java的arrayList
def list=[]
def list1=[10,3,14,-4,5]
//定义list为数组
def list2=[2,3,4,2] as int [] //使用as 转为数组
int [] list3=[3,3,2,4,5]
//列表的排序
def sortList=[4,3,2,-6,-2,49]
Collections.sort(sortList)
println(sortList)//[-6, -2, 2, 3, 4, 49]
//自定义排序规则
Comparator mc={a,b->
a==b?0:Math.abs(a)
}
Collections.sort(sortList,mc)
println(sortList) //[-2, 2, 3, 4, -6, 49]
//groovy中的方便排序
list1.sort()
println(list1) //[-4, 3, 5, 10, 14]
list1.sort(mc)
println(list1) //[3, -4, 5, 10, 14]
def sortStringlist=['abc','z','adsg','adsgdsr','asddd']
sortStringlist.sort{ it->it.size() }
println(sortStringlist) //[z, abc, adsg, asddd, adsgdsr]
def findlist=[-2,3,4,1,13,-5]
int result=findlist.find{
returnit%2==0
}
println(result) //-2
def result2=findlist.findAll{return it%2!=0}
println(result2) //[3, 1, 13, -5]
def result3=findlist.any {return it%2!=0} //是否有奇数
println(result3) //true
def result4=findlist.every{return it%2!=0 } //是否都是奇数
println(result4) //false
println(findlist.max{return Math.abs(it)}) //13
println(findlist.min{return Math.abs(it)}) //1
println(findlist.count{return it >=4}) //2 统计个数
//groovy中的map,默认是java中的linkedHashMap , map中key一般使用字符串或数字,默认是单引号String
def colors=[red:'ff000000',green:'00ff2334',blue:'00ff343233']
//索引,同样也可以使用java 的get 方法
println(colors.blue) //00ff343233
println(colors['blue']) //00ff343233
colors.yellow='00ff3334'
println(colors.toMapString())
//输出：[red:ff000000, green:00ff2334, blue:00ff343233, yellow:00ff3334]
colors.complex=[2:2,3:2]
println(colors.toMapString())
//[red:ff000000, green:00ff2334, blue:00ff343233, yellow:00ff3334, complex:[2:2, 3:2]]
println(colors.getClass()) //class java.util.LinkedHashMap
//使用其他map
def colors2=[red:'wewew',green:'adss'] as HashMap
HashMap color3=[red:'sdsese',blue:'sdses']
//map常用操作
def students=[
1:[number:'001',name:'boj',score:442,sex:'male'],
2:[number:'002',name:'boaj',score:444,sex:'fmale'],
3:[number:'003',name:'bobj',score:445,sex:'male'],
4:[number:'004',name:'bocj',score:442,sex:'fmale'],
]
//遍历
students.each{
defstudent->println("dddd::student::key=${student.key}::sudent::value=${student.value}")
}
//带索引的遍历
students.eachWithIndex{ def student , int i ->
println("cccc:::index:::${i}::::key=${student.key}::::value=${student.value}")
}
//key ,value 索引,出来遍历entry,也可以直接遍历索引,
students.each {
key,value->println("aaaa::::student::key=${key}:::sudent:::value=${value}")
}
//遍历带索引,key,value
students.eachWithIndex{ key ,value, int i -> println("bbbb::index:::${i}::::key=${key}::::value=${value}")
}
//find方法
def entry=students.find { def studetn->return studetn.value.score>442 };
println(entry) //2={ number=002, name=boaj, score=444, sex=fmale }
def entrys=students.findAll { return it.value.score>442 }
println(entrys) //[2:[number:002, name:boaj, score:444, sex:fmale], 3:[number:003, name:bobj, score:445, sex:male]]
def counr=students.count { return it.value.score>442&&it.value.sex=='fmale' }
println(counr)
def names=students.findAll { return it.value.score>442 }.collect { return it.value.name }//添加收集的条件
println(names)//[boaj, bobj]
//分组,类似sql语句
def group=students.groupBy {return it.value.score>442?'及格':'不及格'}
println(group.toMapString())
//[不及格:[1:[number:001, name:boj, score:442, sex:male], 4:[number:004, name:bocj, score:442, sex:fmale]], 及格:[2:[number:002, name:boaj, score:444, sex:fmale], 3:[number:003, name:bobj, score:445, sex:male]]]
//map排序
def sort=students.sort{def s1,def s2->
Number score1=s1.value.score
Number score2=s2.value.score
return score1==score2?0:score1>score2?1:-1
}
println(sort.toMapString())
//[1:[number:001, name:boj, score:442, sex:male], 4:[number:004, name:bocj, score:442, sex:fmale], 2:[number:002, name:boaj, score:444, sex:fmale], 3:[number:003, name:bobj, score:445, sex:male]]
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