编辑代码

import groovy.json.*
class ReqParam{
    String barcodes
}
def paramConvert(param){
    String barcodes = ''
    for(billing in param.checkBillings){
        barcodes +='088'+ billing.billingCode+','
    }
    barcodes = barcodes.substring(0,barcodes.length() - 1)
    return JsonOutput.toJson(new ReqParam(barcodes:barcodes))
}