如何在常规脚本中将null转换为0 [英] How to cast null to 0 in groovy scripting

问题描述

我正在尝试创建一笔款项，但我想将所有 null 值都转换为 0 值，所以它可以执行总和。但是，我收到此错误;

I am trying to create a sum but I want to cast all of the null values as 0 values so that it can perform the sum. However I am receiving this error;

Cannot cast object '[null, null, null, null, null, null, null, null,
  null, null, null, null, null, null, null, null, null, null, null, 
  null, null, null, null, null, null, null, null, null, null, null, 
  null, null, null, null, null, null, null, null, null, null, null, 
  null, null, null, null, null, null, null, null, null, null]'
  with class 'java.util.ArrayList' to class 'int'

<

How can I cast all nulls into 0?

以下是我的代码：

Below is the code I have:

 def resultSearchCostGroup = json.xxx.xxx.xxx.search
    int totalSearchCostGroup = json.xxx.xxx.xxx.search.collectMany{ it ?: 0 }.sum()
    log.info resultSearchCostGroup

推荐答案

c $ c> flatten 您的收藏，然后 collect 来取代空值？

Your you can just flatten your collection and then collect to replace nulls?

json.products.costGroups.costLines.search.flatten().collect{it?:0}.sum()

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