Deep Comparing of two json and displaying the differences
05:12 26 Dec 2016

I am trying to compare two dynamic json data and if they are not equal then i am printing the differences. For this i am using 

Type mapType = new TypeToken>(){}.getType();
Map firstMap = g.fromJson(jsonElement1, mapType);
Map secondMap = g.fromJson(jsonElement2, mapType);
System.out.println(Maps.difference(firstMap, secondMap));

I need to display the difference in the console. This is the java code in which i am trying to display the differences of the json

      public class Tester {
public static ArrayList ls1 = new ArrayList();
 public static              ArrayList ls2 = new ArrayList();
            public static void main(String[] args) throws Exception {
                JsonParser parser = new JsonParser();

                try{
                    Gson g = new Gson();
                    JsonElement jsonElement1 = parser
                            .parse(new FileReader("D:\\file1.json"));
                    JsonElement jsonElement2 = parser
                            .parse(new FileReader("D:\\file2.json"));
                    System.out.println("Is the two JSON File Same: "+compareJson(jsonElement1, jsonElement2));
                    if(!compareJson(jsonElement1, jsonElement2)){
                        Type mapType = new TypeToken>(){}.getType();
                        Map firstMap = g.fromJson(jsonElement1, mapType);
                        Map secondMap = g.fromJson(jsonElement2, mapType);
                        System.out.println(Maps.difference(firstMap, secondMap));
                    }
                    else{
                        System.out.println("The Two JSON Are SAME!!!!!!!!!!!!!!!");
                    }

                }catch(Exception e1){
                    e1.printStackTrace();
                }

            }

            public static boolean compareJson(JsonElement json1, JsonElement json2) {
                boolean isEqual = true;

                // Check whether both jsonElement are not null
                if (json1 != null && json2 != null) {

                    // Check whether both jsonElement are objects
                    if (json1.isJsonObject() && json2.isJsonObject()) {
                        Set> ens1 = ((JsonObject) json1).entrySet();
                        Set> ens2 = ((JsonObject) json2).entrySet();
                        JsonObject json2obj = (JsonObject) json2;
                        if (ens1 != null && ens2 != null && (ens2.size() == ens1.size())) {
                            // Iterate JSON Elements with Key values
                            for (Entry en : ens1) {
                                isEqual = isEqual && compareJson(en.getValue(),json2obj.get(en.getKey()));
                            }
                        } else {
                            return false;
                        }
                    }
                    // Check whether both jsonElement are arrays
                    else if (json1.isJsonArray() && json2.isJsonArray()) {
                        JsonArray jarr1 = json1.getAsJsonArray();
                        JsonArray jarr2 = json2.getAsJsonArray();
                        if (jarr1.size() != jarr2.size()) {
                            return false;
                        } else {
                            int i = 0;
                            // Iterate JSON Array to JSON Elements
                            for (JsonElement je : jarr1) {
                                isEqual = isEqual && compareJson(je, jarr2.get(i));
                                i++;
                            }
                            if (isEqual) {
                                Object[] o1 = ls1.toArray();
                                Object[] o2 = ls2.toArray();
                                isEqual = Arrays.deepEquals(o1, o2);
                            }
                        }

                    }

                    // Check whether both jsonElement are null
                    else if (json1.isJsonNull() && json2.isJsonNull()) {
                        return true;
                    }

                    // Check whether both jsonElement are primitives
                    else if (json1.isJsonPrimitive() && json2.isJsonPrimitive()) {
                        ls1.add(json1);
                        ls2.add(json2);         
                    }               
                } else if (json1 == null && json2 == null) {
                    return true;
                } else {
                    return false;
                }
                return isEqual;
            }
        }



the object array



if (isEqual) {
                            Object[] o1 = ls1.toArray();
                            Object[] o2 = ls2.toArray();
                            isEqual = Arrays.deepEquals(o1, o2);
                        }




the object array o1 and o2 are null dont know why it is null.
These are the two sample json i am using for testing json1 {"Company List":["Compnay: Paypal","Compnay: eBay","Compnay: Google"]} json2 {"Company List":["Compnay: Viswesh","Compnay: Anand","Compnay: Anand"]} in both the json the value for company is different so the code has to return false but the code return true


              
      

          
                  java
                arrays
                json