如何使用beanshell预处理器更新jmeter中的JSON节点值

Question

目前，我正在尝试使用 BeanShell 预处理器更新 JSON 响应节点值。

需要帮助转换对象中的JSON响应，然后更新节点值和stringify。

我有以下JSON，我想在Jeter中使用BeanShell预处理器更新OrderTypeId和IsCreentaloff值。我在邮递员中尝试了一个效果很好的解决方案。但在BeanShell脚本中遇到困难。

{"DeliveryCharge":0.0,"ApplyCouponToCart":true,"CartId":6970,"SessionId":"DB84A55E-82A9-4BC9-98E8-2A845FB6893A","StoreId":10061,"UserId":10011690,"AppId":10061,"ListCartItem":[{"CartItemId":55513,"UserId":0,"StoreId":0,"AppId":0,"CartId":6970,"PID":772544,"Pack":1,"ProductId":5712,"ProductImage":"https://s3.amazonaws.com/images.liquorapps.com/sm/000457-TWO-FINGERS-GOLD-TEQUILA.png","ProductName":"TWO FINGERS GOLD","UnitSize":"750 ML","Quantity":1,"UPC":"89540135328","SKU":"1014","CategoryId":2,"TypeId":15,"VarietalId":0,"UnitSizeId":12,"CountryId":7,"RegionId":32,"Price":14.99,"PriceDisplay":"$14.99","OfferPrice":14.99,"OfferPriceDisplay":"$14.99","FinalPrice":14.99,"FinalPriceDisplay":"$14.99","TaxRate":0.066250,"QuantityOrdered":1,"Remark":"","ItemTotal":14.99,"ItemTotalDisplay":"$14.99","FinalItemTotal":14.99,"FinalItemTotalDisplay":"$14.99","ItemTotalSaving":0.00,"ItemTotalSavingDisplay":"","ListDiscount":[],"ListCharge":[],"CartItemCount":0,"Deposit":0.00,"DealId":0,"DealInventory":0,"DealInventoryMessage":"","IsBottleLimitAtRetail":false,"TotalQuantity":1,"IsOfferItem":false,"SuccessMessage":"","ErrorDetail":"","ErrorMessage":"","MessageType":"","MessageTitle":"","TextType":""}],"ListDiscount":[],"ListCharge":[],"CouponCode":"","OrderTypeId":1,"AddressId":0,"PaymentTypeId":0,"TipForDriver":0.00,"ListTipForDriver":[],"SubTotal":14.99,"SubTotalDisplay":"$14.99","TotalSavings":0.0,"TotalSavingsDisplay":"-$0.00","TotalCharges":0.0,"TotalChargesDisplay":"$0.00","TotalValue":14.99,"TotalValueDisplay":"$14.99","SubTotalAfterDsicount":14.99,"SubTotalAfterDiscountDisplay":"$14.99","CartPaymentItemUser":{"UserId":10011690,"StoreId":10061,"AppId":0,"PaymentTypeId":0,"UserProfileId":"","IsDefault":false,"IsCardDefault":false,"Credential1":"","Credential2":"UdVYyaeBH+IBzsetzftdBw==","Credential3":"","IsLive":false},"DoPDate":"01/01/1900","DoPTimeSlot":"","DopUtcStartDate":"","DopUtcEndDate":"","Remark":"","DeliveryTax":0.0,"ShippingCost":0.0,"CartItemCount":1,"IsCredentialOff":false,"IsDeliverySolution":false,"DeliveryFeeMarkUp":0.0,"ShippingTax":0.0,"DeliveryTaxRate":0.0,"IsFromCheckOut":true,"IsUpgradeUser":true,"IsToCallDSP":false,"DeliveryInstruction":"","IsStoreCreditUtilize":false,"OrderRewardCredit":5.00,"OrderRewardCreditDisplay":"-$5.00","OrderTotalWithCredit":0.0,"IsStoreReward":false,"CouponRemark":"","IsShipping":false,"CartTotalQuan":1,"ShippingServiceCode":"","ActualDeliveryCharge":0.0,"EstimatedShippingCost":0.0,"ShippingDeliveryCharge":0.0,"DoordashValidateCustomer":false,"CustomerSessionId":13733,"ConvenienceFee":0.0,"IsDoCalculation":false,"SuccessMessage":"","ErrorDetail":"","ErrorMessage":"","MessageType":"","MessageTitle":"","TextType":""}

我在BeanShell预处理器中尝试过:

var CartGetDetailsObject = prev.getResponseDataAsString();
var jsonData  = JSON.parse(CartGetDetailsObject);
jsonData.OrderTypeId=2;
jsonData.IsCredentialOff=true;
vars.put("vCartGetDetailsObject",JSON.stringify(jsonData));
log.info(vCartGetDetailsObject);

错误日志

2020-04-06 12:56:48,139 INFO o.a.j.e.StandardJMeterEngine: Running the test!
2020-04-06 12:56:48,145 INFO o.a.j.s.SampleEvent: List of sample_variables: []
2020-04-06 12:56:48,153 INFO o.a.j.r.ResultCollector: Folder at F:\Office\Performance Test Cases\BottlecappsJmeterPerformanceScripts\apache-jmeter-5.0\RunScript\Date 6-Apr-2020 125648 was created
2020-04-06 12:56:48,154 INFO o.a.j.g.u.JMeterMenuBar: setRunning(true, *local*)
2020-04-06 12:56:48,958 INFO o.a.j.e.StandardJMeterEngine: Starting ThreadGroup: 1 : Thread Group
2020-04-06 12:56:48,958 INFO o.a.j.e.StandardJMeterEngine: Starting 1 threads for group Thread Group.
2020-04-06 12:56:48,958 INFO o.a.j.e.StandardJMeterEngine: Thread will continue on error
2020-04-06 12:56:48,958 INFO o.a.j.t.ThreadGroup: Starting thread group... number=1 threads=1 ramp-up=0 perThread=0.0 delayedStart=false
2020-04-06 12:56:48,984 INFO o.a.j.t.ThreadGroup: Started thread group number 1
2020-04-06 12:56:48,984 INFO o.a.j.e.StandardJMeterEngine: All thread groups have been started
2020-04-06 12:56:48,986 INFO o.a.j.t.JMeterThread: Thread started: Thread Group 1-1
2020-04-06 12:56:48,987 INFO o.a.j.s.FileServer: Stored: F:\Office\Performance Test Cases\BottlecappsJmeterPerformanceScripts\apache-jmeter-5.0\testrundata.csv
2020-04-06 12:56:53,982 ERROR o.a.j.u.BeanShellInterpreter: Error invoking bsh method: eval Sourced file: inline evaluation of: ``var CartGetDetailsObject = prev.getResponseDataAsString(); var jsonData  = JSON. . . . '' : Typed variable declaration : Attempt to resolve method: parse() on undefined variable or class name: JSON
2020-04-06 12:56:53,982 WARN o.a.j.m.BeanShellPreProcessor: Problem in BeanShell script. org.apache.jorphan.util.JMeterException: Error invoking bsh method: eval   Sourced file: inline evaluation of: ``var CartGetDetailsObject = prev.getResponseDataAsString(); var jsonData  = JSON. . . . '' : Typed variable declaration : Attempt to resolve method: parse() on undefined variable or class name: JSON
2020-04-06 12:56:54,645 ERROR o.a.j.p.h.s.HTTPJavaImpl: readResponse: java.io.IOException: Server returned HTTP response code: 400 for URL: https://staging.liquorapps.com/Bcapi/api/Cart/CartUpdate
2020-04-06 12:56:54,645 ERROR o.a.j.p.h.s.HTTPJavaImpl: Cause: java.io.IOException: Server returned HTTP response code: 400 for URL: https://staging.liquorapps.com/Bcapi/api/Cart/CartUpdate
2020-04-06 12:56:54,645 INFO o.a.j.p.h.s.HTTPJavaImpl: Error Response Code: 400
2020-04-06 12:56:57,171 ERROR o.a.j.u.BeanShellInterpreter: Error invoking bsh method: eval Sourced file: inline evaluation of: ``var CartGetDetailsObject = prev.getResponseDataAsString(); var jsonData  = JSON. . . . '' : Typed variable declaration : Attempt to resolve method: parse() on undefined variable or class name: JSON
2020-04-06 12:56:57,171 WARN o.a.j.m.BeanShellPreProcessor: Problem in BeanShell script. org.apache.jorphan.util.JMeterException: Error invoking bsh method: eval   Sourced file: inline evaluation of: ``var CartGetDetailsObject = prev.getResponseDataAsString(); var jsonData  = JSON. . . . '' : Typed variable declaration : Attempt to resolve method: parse() on undefined variable or class name: JSON
2020-04-06 12:56:57,389 ERROR o.a.j.p.h.s.HTTPJavaImpl: readResponse: java.io.IOException: Server returned HTTP response code: 400 for URL: https://staging.liquorapps.com/Bcapi/api/Cart/CartUpdate
2020-04-06 12:56:57,389 ERROR o.a.j.p.h.s.HTTPJavaImpl: Cause: java.io.IOException: Server returned HTTP response code: 400 for URL: https://staging.liquorapps.com/Bcapi/api/Cart/CartUpdate
2020-04-06 12:56:57,389 INFO o.a.j.p.h.s.HTTPJavaImpl: Error Response Code: 400
2020-04-06 12:56:58,364 INFO o.a.j.g.a.Start: Stopping test
2020-04-06 12:56:58,377 INFO o.a.j.t.JMeterThread: Stopping: Thread Group 1-1
2020-04-06 12:56:58,377 WARN o.a.j.t.JMeterThread: Interrupting: Thread Group 1-1 sampler: LoginCustomer
2020-04-06 12:56:58,382 INFO o.a.j.t.JMeterThread: Thread finished: Thread Group 1-1
2020-04-06 12:56:58,383 INFO o.a.j.e.StandardJMeterEngine: Notifying test listeners of end of test
2020-04-06 12:56:58,383 INFO o.a.j.s.FileServer: Close: F:\Office\Performance Test Cases\BottlecappsJmeterPerformanceScripts\apache-jmeter-5.0\testrundata.csv
2020-04-06 12:56:58,385 INFO o.a.j.g.u.JMeterMenuBar: setRunning(false, *local*)

Answer 1

JSON是Web API的标准内置对象，您可以在Postman中运行它，因为Postman是一个电子应用程序（浏览器）。JMeter不是浏览器，因此您不能使用JSON函数。

>

将 JSR223 后处理器添加为返回高于 JSON 的请求的子级

将以下代码放入“脚本”区域：

def jsonData = new groovy.json.JsonSlurper().parse(prev.getResponseData())
jsonData.OrderTypeId = 2
jsonData.IsCredentialOff = true
vars.put("vCartGetDetailsObject", new groovy.json.JsonBuilder(jsonData).toPrettyString())
log.info(vars.get('vCartGetDetailsObject'))

更多信息：

< li>Apache Groovy -解析和生成JSON < li>Apache Groovy -为什么以及如何使用它