How to extract list data in JMeter?

In JMeter, you can use regular expressions to extract list data. Here are the steps for extracting list data:

1. Add an HTTP request to retrieve a response containing a list of data.
2. In the HTTP request, open the “Response Data” tab, check the “Save response data to file” option, and specify a file path.
3. Below the HTTP request, click on the “Response Data” tab, then select the “Regular Expression Extractor” by clicking on the “Add” button.
4. “Applied to” –> Choose “subject”.
5. “Response Field Name”: Enter a field name to save the extracted list data.
6. “Regular expression”: Input a regular expression to match list data.
7. “Template”: Input a template for extracting list data, for example: $1$.
8. “Match number”: Enter a number to indicate the index of the list data to extract.
9. Run the test plan, and the extracted list data will be saved in the specified field.

Please note that writing regular expressions requires adjustments based on the specific situation to correctly match the desired list data. Other extractors like CSS selectors or XPath extractors can also be used depending on the needs.