在jmeter中使用groovy生成json主体，数组中包含数组

Question

我正在尝试使用csv文件中的值动态生成JSON主体。为此，我将JSR223预处理器与groovy脚本结合使用。我希望在运行groovy脚本时生成以下格式

{
"transactionId": "100",
"lineItems": [{
"lineItemNo": "1",
"cardInfo": {
"cardNumber": "3456"
}
},
{
"lineItemNo": "2",
"cardInfo": {
"cardNumber": "45698"
}
}
]
}

但当我执行脚本时，我会得到低于格式的

POST data:
{
"transactionId": "100",
"lineItems": [
{
"lineItemNo": "1",
"Cardinfo": [
9255000012794606,
9255000012794645
]
},
{
"lineItemNo": "1",
"Cardinfo": [
9255000012794606,
9255000012794645
]
}
]
}

生成json主体的脚本

File csvFile = new File("D:\Project Related Docs\Jmeter\apache-jmeter-5.0\bin\Map_Performance\Map_New_Auto_jmx\2Cards.csv")
def cards = csvFile.readLines()
List<String> cardnumbmer = new ArrayList<>()
def counter = 1
cards.eachWithIndex{line,idx->cardnumbmer.add(line)}
log.info("size of csv = "+cardnumbmer.size())
log.info("File conents = "+cardnumbmer[0])
//build the json body
def ids = new groovy.json.JsonSlurper().parseText(cardnumbmer.toString())
log.info("cardnumbmer to string = "+cardnumbmer.toString())
def builder = new groovy.json.JsonBuilder()
builder([
transactionId:"100",
lineItems:ids.collect{[lineItemNo:"1",Cardinfo: ids.collect{carnumber: it}]}
])
//sampler.getArguments().removeAllArguments()
sampler.addNonEncodedArgument('',builder.toPrettyString(),'')
sampler.setPostBodyRaw(true);

--CSV文件的卡号按行列出，如下所示925500001279460692550000001279645

请求帮助我了解如何解决此问题。

Answer 1

ids.collect{carnumber: it}基本上就是ids。明确返回地图：ids.collect{ [carnumber: it] }

Answer 2

以下代码解决了问题

//build the json body
def ids = new groovy.json.JsonSlurper().parseText(cardnumbmer.toString())
log.info("cardnumbmer to string = "+cardnumbmer.toString())
def builder = new groovy.json.JsonBuilder()
def count = 1
builder([
transactionId:"100",
//lineItems:ids.collect{[lineItemNo:"1",Cardinfo: count.collect{[carnumber: it]}]}
lineItems:ids.collect{[lineItemNo:count++,Cardinfo: [Cardnumber:it]]}
])
//sampler.getArguments().removeAllArguments()
sampler.addNonEncodedArgument('',builder.toPrettyString(),'')
sampler.setPostBodyRaw(true);