How can we validate json based on key value pair in Jmeter

Question

I haved worked around with Jmeter for load Testing. But now i am focusing on api automation.

Reading file from CSV for the endpoints and Response expected, only challenge i am facing whether how to validate the json based on key value pair, so that i can validate only those data in which i am interested and not whole JSON body.

In java using eclipse we can do this using below Method:

JSONObject obj1=null,obj2=null;

        obj1=new JSONObject(actual);
        obj2=new JSONObject(required);
    Iterator<?> keys = obj2.keys();
    while( keys.hasNext() ) {
         String key = (String)keys.next();
        if(obj2.get(key) instanceof JSONArray)
        {
            if(!compareJSONArray(obj2.getString(key),obj1.getString(key)))
            {return false;}
            status=true;
        }else if(obj2.get(key) instanceof JSONObject)
        {
            if(!compareJSON(obj2.getString(key),obj1.getString(key)))
            {return false;}
            status=true;    
        }else{
            if(obj2.getString(key).equalsIgnoreCase(obj1.getString(key)))
                    {

                status=true;
                    }
            else{
                return false;
            }

        }

How can i do this following in Jmeter. Please Help

Answer 1

You can use JSON Path Assertion to validate JSON responses using JSON Path language expressions.

JSON Path Assertion can be installed using JMeter Plugins Manager

---

Another option is using JSR223 Assertion and Groovy language. Groovy is almost fully Java-compatible so you should be able to re-use your existing Java code. Alternatively be aware that Groovy has built-in JSON support so you can re-implement your JSON comparison logic using Groovy style scripting.