Need to build large Json Request using "CSV Data Set Config" in Jmeter

Given your CSV file looks like:

9998885551,john25,[email protected],ricky25,9820420420
9998885552,john26,[email protected],ricky26,9820420421

1. Add JSR223 PreProcessor as a child of the HTTP Request sampler which body you want to generate

2. Put the following code into "Script" area:

   def body = []
   new File('/path/to/your/file.csv').readLines().each { line ->
       def entry = [:]
       def values = line.split(',')
       entry.put('phoneNo', values[0])
       entry.put('lastName', values[1])
       entry.put('email', values[2])
       entry.put('firstName', values[3])
       entry.put('mobileNo', values[4])
       body.add(entry)
   }
   sampler.addNonEncodedArgument('', new groovy.json.JsonBuilder(body).toPrettyString(),'')
   sampler.setPostBodyRaw(true)
   

3. That's it, the JSR223 PreProcessor will generate the request body out of the CSV file

   

References:

• Apache Groovy: Parsing and producing JSON
• Apache Groovy - Why and How You Should Use It