如何在Groovy中插入字符串？

我有多个列表类型的变量。我有另一个列表类型变量，它将所有变量的名称作为值保存

def A = ['abc','def','ghi']
def B = ['123','456','789']
def C = ['ABC','DEF','GHI']

def masterList = ['A','B','C']

masterList.each {

    println "${${it}}"

}

我希望输出为

“abc”、“def”、“ghi”

‘123’、‘456’、‘789’

---

“ABC”、“DEF”、“GHI”

如果这些变量是局部范围的，则不能动态引用它们

解决方案1：在列表中使用地图：

def map = ['A': ['abc','def','ghi'],
           'B': ['123','456','789']
           'C': ['ABC','DEF','GHI']]

然后

masterList.each {println map[it]}

解决方案2：创建当前类的

A

、

B

和

C

实例变量（如果尚未创建），然后可以使用括号表示法动态读取这些属性：

masterList.each {println this[it]}

---

如果这些变量是局部范围的，则不能动态引用它们

解决方案1：在列表中使用地图：

def map = ['A': ['abc','def','ghi'],
           'B': ['123','456','789']
           'C': ['ABC','DEF','GHI']]

然后

masterList.each {println map[it]}

解决方案2：创建当前类的

A

、

B

和

C

实例变量（如果尚未创建），然后可以使用括号表示法动态读取这些属性：

masterList.each {println this[it]}

---

如果它在

类中

：

class Foo {
    def A = ['abc','def','ghi']
    def B = ['123','456','789']
    def C = ['ABC','DEF','GHI']
}

Foo foo = new Foo()
def masterList = ['A','B','C']
masterList.each {
    println foo[it]
}

---

如果它在

类中

：

class Foo {
    def A = ['abc','def','ghi']
    def B = ['123','456','789']
    def C = ['ABC','DEF','GHI']
}

Foo foo = new Foo()
def masterList = ['A','B','C']
masterList.each {
    println foo[it]
}

---

如果是脚本，那么这将起作用：

A = ['abc','def','ghi']
B = ['123','456','789']
C = ['ABC','DEF','GHI']

def masterList = ['A','B','C']

masterList.each {
    println this."$it"
}

---

请注意，

A，B，C

前面没有

def

，如果它是脚本，那么这将起作用：

A = ['abc','def','ghi']
B = ['123','456','789']
C = ['ABC','DEF','GHI']

def masterList = ['A','B','C']

masterList.each {
    println this."$it"
}

---

请注意，在

A、B、C

前面没有

def

，尽管这取决于您的使用情况，但以下操作很好。。。只要变量是类级变量

class MyClass {
  def A = ['abc','def','ghi']
  def B = ['123','456','789']
  def C = ['ABC','DEF','GHI']

  def test(String role, String group) {
    def masterList = ['A','B','C']
    masterList.each { it ->
      println(" ${it} = ${this[it]}")
    }
  }
}

结果:

A = [abc, def, ghi]
B = [123, 456, 789]
C = [ABC, DEF, GHI]

---

虽然这将取决于您的用例，但下面的工作很好。。。只要变量是类级变量

class MyClass {
  def A = ['abc','def','ghi']
  def B = ['123','456','789']
  def C = ['ABC','DEF','GHI']

  def test(String role, String group) {
    def masterList = ['A','B','C']
    masterList.each { it ->
      println(" ${it} = ${this[it]}")
    }
  }
}

结果:

A = [abc, def, ghi]
B = [123, 456, 789]
C = [ABC, DEF, GHI]