grovvy 字符串保留两位小数

在Groovy中，如果你想要将一个数字保留两位小数并将其转换为字符串，你可以使用`String.format()`方法或使用`NumberFormat`类来实现。以下是两种方法的示例代码：

方法1：使用`String.format()`

def num = 3.1415926
def formattedString = String.format("%.2f", num)
println(formattedString)

输出：

3.14

方法2：使用`NumberFormat`

import java.text.NumberFormat

def num = 3.1415926
def numberFormat = NumberFormat.getNumberInstance()
numberFormat.setMaximumFractionDigits(2)
def formattedString = numberFormat.format(num)
println(formattedString)

输出：

3.14

希望这可以帮助到你！<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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