图书馆借阅是否借阅小案例(groovy中list和map的使用)

Posted 2022-12-04 duangxcg

//方式一：用list 集合实现
//定义一个list集合（也叫列表），并存四条数据
def library=[["john","book1"],["ben","book2"],["darlven","book3"]]
//groovy给list添加两条数据（有两种方法）
library<<["jack","book4"]
library.add(["jack","book5"])
//遍历list集合的所有数据
for(String tmp:library)
   System.out.println(tmp)

//统计集合中有多少条数据
println(library.size())
//打印出集合中的所有数据
println "library: $library"
//查询集合中是否有张三借了书名为《book1》的书，没有返回false,有返回true
boolean res=library.contains(["jon","book1"])
println res
println("++++++++++++++++++++++++++++++++++++++++++++++++++=")
//方式二用map映射实现

def mapData=['ken':['book1'],'john':['book2']]
mapData['lily']=['book3']
mapData['lily1']=['book4']
mapData['lily']=mapData['lily']<<000
boolean result =mapData['lily'].contains('book3')
def  num=mapData.size()
print(num)
println result