How to use JMeter JSON Extractor?

2 years ago
Benjamin Taylor
1 minute

JMeter offers a JSON extractor to extract specific values from a JSON response. Here are the steps for using the JMeter JSON extractor:

  1. Create a thread group in JMeter and add an HTTP request.
  2. Select the JSON response in the HTTP request from which values need to be extracted.
  3. “Add a JSON extractor by right-clicking on the HTTP request and selecting ‘Add -> Post Processors -> JSON Extractor’.”
  4. “Variable name”: specifies the name of the variable where the extracted value will be saved.
  5. “JSON path expression” refers to the specified JSON path from which values are to be extracted. Nested properties can be accessed using dots (.), for example: $.users[0].name.
  6. “Matching number”: specifies the index of the value to be extracted. When it is an array, you can use 0 to represent the first element.
  7. “Default value”: specifies the value to use if extraction fails.
  8. “Match suffix”: specifies how the extractor should name the extracted variable when selecting multiple matching items.
  9. Execute the test plan and verify if the extracted values are correctly stored in the variables.

I hope this can help you use the JSON Extractor in JMeter.

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