Question

我正在尝试创建一个看起来像

的main_map

[1:[gender:m, age:1, name:a]].

我试图通过创建一个如下所示的临时地图（student_map）来实现这一目标

[gender:m, age:1, name:a]

我希望将student_map用作另一个地图（main_map）的值，该地图的键值为count（用于序列号），看起来像

[1:[gender:m, age:1, name:a]]

如果我运行下面的脚本并输入3个条目，则main_map显示计数递增3但最后输入的元素迭代3次，即使student_map的值正在改变，我得到的最终结果是最后一个条目student_map迭代了我输入的次数。例如。当我运行我的代码并通过命令提示符输入值。

1st Entry(through command prompt)
name=a
age=1
gender=m

2nd Entry 
name=b
age=2
gender=m

3rd entry
name=c
age=3
gender=m

预期产出

[1:[gender:m, age:1, name:a],2:[gender:m, age:2, name:b],3:[gender:m,    age:3, name:c]]

输出我正在

[1:[gender:m, age:3, name:c], 2:[gender:m, age:3, name:c], 3:[gender:m, age:3, name:c]]

注意：我无法使用以下一行代码

在此地图中搜索特定值

def result=main_map.find{it.value.name == 'a'} \\This is present in both pieces of code below \\

我已在下面粘贴了两段代码（两者都有效但未按预期进行）

代码1 - 这给了我意想不到的输出

def answer=System.console().readLine 'Do you want to add a student Y/N\n'

def student_map = new HashMap()

//print student_map.getClass()
def main_map = [:]
//print main_map.getClass()
def count=0
while (answer=='Y' || answer=='y') { 

         count++
         def name=System.console().readLine 'What is your name\n'
         def age=System.console().readLine 'What is your age\n'
         def gender=System.console().readLine 'What is your gender M/F\n'

         student_map.put('name',"${name}")
         student_map.put('age',"${age}")
         student_map.put('gender',"${gender}")

        print student_map

         main_map.put("${count}","${student_map}")

         print main_map 
         answer=System.console().readLine 'Do you want to continueY/N\n' 

         }

print main_map  

def name='a'
def result=main_map.find{it.value.name == 'a'}

代码2 - 这给了我预期的输出，但没有运气搜索值

def answer=System.console().readLine 'Do you want to add a student Y/N\n'

def student_map = new HashMap()

//print student_map.getClass()
def main_map = [:]
//print main_map.getClass()
def count=0
while (answer=='Y' || answer=='y') { 

         count++
         def name=System.console().readLine 'What is your name\n'
         def age=System.console().readLine 'What is your age\n'
         def gender=System.console().readLine 'What is your gender M/F\n'

         student_map=[name:(name),age:(age),gender:(gender)]            
        print student_map

         main_map.put("${count}","${student_map}")

         print main_map 
         answer=System.console().readLine 'Do you want to continueY/N\n' 

         }

print main_map  

def name='a'
def result=main_map.find{it.value.name == 'a'}

感谢我能得到的任何帮助

感谢vahidreza的回复。我已经纠正了那个部分，现在却把这个地图放到了一个文件中。我的脚本下面的行有问题。虽然我可以插入键或值

，但我无法插入键和值

工作

  main_map.each {k, v -> writer.print(k)} 
  o/p from file
  12 (i entered two records so the count incremented twice and hence 1 and 2)

不工作

  main_map.each {k, v -> writer.print(k,v)}

完整脚本

  def answer=System.console().readLine 'Do you want to add a student Y/N\n'

  def student_map = new HashMap()

  //print student_map.getClass()
  def main_map = [:]
  //print main_map.getClass()
  def count=0
   while (answer=='Y' || answer=='y') { 

               count++

               def name=System.console().readLine 'What is your name\n'
               def age=System.console().readLine 'What is your age\n'
               def sex=System.console().readLine 'What is your sex M/F\n'

               student_map=[name:(name),age:(age),sex:(sex)]            

               //print student_map

               main_map.put((count),(student_map))

               //print main_map 
               answer=System.console().readLine 'Do you want to continueY/N\n' 

               }

  File f = new File ("C:/Apoorv/groovy-2.0.8/Groovy_programs/students.txt")
  writer = new PrintWriter(f)

  main_map.each {k, v -> writer.print(k,v)} 

  writer.close()
  def student_name = System.console().readLine 'Name to search ?\n'
  def result = main_map.find { it.value.name == "${student_name}" } 
  print result

感谢您的回复。我修复了无法正常工作/工作的部分。现在我在将数据放入文件并存储时遇到了一些问题。如前所述，我能够将特定记录的键或值存储在文件中，但我无法在文件中插入整个记录。

更新##我的代码工作正常，正在做我打算做的事情，但排序有一个奇怪的问题###

以下是我的参考资料

代码＃

  def answer=System.console().readLine 'Do you want to add a student Y/N\n'

  def student_map = new HashMap()
  //print student_map.getClass()
  def main_map = [:]
  //print main_map.getClass()
  def count=0
   while (answer=='Y' || answer=='y') { 

               count++

               def name=System.console().readLine 'What is your name\n'
               def age=System.console().readLine 'What is your age\n'
               def sex=System.console().readLine 'What is your sex M/F\n'

               student_map=[name:(name),age:(age),sex:(sex)]            

               //print student_map

               main_map.put((count),(student_map))

               //print main_map 
               answer=System.console().readLine 'Do you want to continueY/N\n' 

               }

  print main_map.values().sort { a, b -> a.age <=> b.age}             

  File f = new File ("C:/Apoorv/groovy-2.0.8/Groovy_programs/students.txt") // Writing in file student.txt //
  writer = new PrintWriter(f)
  writer.print main_map
  writer.close()

  print main_map
  def student_name = System.console().readLine 'Name to search ?\n'
  def result = main_map.find { it.value.name == "${student_name}" } 
  print result

我想根据地图student_map的值对值进行排序。我正在使用以下线来实现它

print main_map.values().sort { a, b -> a.age <=> b.age}

这适用但不适用于4位数的值。请考虑以下示例。

通过命令提示符给出的I / p

Do you want to add a student Y/N
What is your name
apoorv
What is your age
100
What is your sex M/F
m
Do you want to continueY/N
y
What is your name
kaandi
What is your age
21
What is your sex M/F
m
Do you want to continueY/N
y
What is your name
manjushree
What is your age
19
What is your sex M/F
f
Do you want to continueY/N
n

输出

[[name:apoorv, age:100, sex:m], [name:manjushree, age:19, sex:f],   [name:kaandi, age:21, sex:m]]

正如您所看到的那样，第二个和第三个条目已经排序但不是第一个。我无法理解sort函数的这种行为。

任何帮助表示赞赏

Answer 1

你的代码输出对我来说很好......我错过了什么吗？

Groovy（run.groovy）

def answer=System.console().readLine 'Do you want to add a student Y/N\n'
def student_map = new HashMap()
def main_map = [:]
def count=0
while (answer=='Y' || answer=='y') { 
   count++
   def name=System.console().readLine 'What is your name\n'
   def age=System.console().readLine 'What is your age\n'
   def sex=System.console().readLine 'What is your sex M/F\n'
   student_map=[name:(name),age:(age),sex:(sex)]
   main_map.put((count),(student_map))
   answer=System.console().readLine 'Do you want to continueY/N\n' 
}
println main_map

命令

C:\tmp>groovy run.groovy
Do you want to add a student Y/N
y
What is your name
a
What is your age
1
What is your sex M/F
m
Do you want to continueY/N
y
What is your name
b
What is your age
2
What is your sex M/F
m
Do you want to continueY/N
y
What is your name
c
What is your age
3
What is your sex M/F
f
Do you want to continueY/N
n
[1:[name:a, age:1, sex:m], 2:[name:b, age:2, sex:m], 3:[name:c, age:3, sex:f]]

输出看起来正确，对吗？你在ide中运行代码吗？

使用用户输入创建地图地图并搜索结果

1 个答案:

Groovy（run.groovy）

命令