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Raji MRaji M 

Have to read below JSON Structure

Hi All,

Can anyone help me in reading JSON Structure through Apex. I need to find the value of "D".

{
    "A" : [{
        "B" : "C",
        
    },
    {
        "B" : {
            "D" : "E"
        }
    }]
}

Thanks,
Raji M
Best Answer chosen by Raji M
Ajay K DubediAjay K Dubedi
Hi Rajeshwari,
Your JSON is not valid firstly please remove ','  after "B" : "C" from your JSON and then remove extra spaces from your JSON.
For remove extra spaces follow this link:
https://codebeautify.org/remove-extra-spaces
Try this to extract the value of D from your JSON: 
string JsonStr = '{ "A" : [{ "B" : "C" }, { "B" : { "D" : "E" } }] }';
Map<String, Object> MapOne = (Map<String, Object>) JSON.deserializeUntyped(JsonStr);
List<Object> listOne = new List<Object>();
Map<String,Object> MapThree = new Map<String,Object>();
if(MapOne.containsKey('A')) {
    listOne = (List<object>) MapOne.get('A');
}
System.debug('listOne------' + listOne);
Map<String,Object> MapTwo = new Map<String,Object>();
for(object obj : listOne)
{
    MapTwo = (Map<String,Object>)obj; 
    system.debug('MapTwo----' + MapTwo);
}
system.debug('MapTwo----' + MapTwo);
if(MapTwo.containsKey('B')) {
    MapThree = (Map<String,Object>) MapTwo.get('B');
}
system.debug('MapThree----' + MapThree);
if(MapThree.containsKey('D')) {
    system.debug('Value Of D is ---- ' + MapThree.get('D'));
}

I hope you find the above solution helpful. If it does, please mark as Best Answer to help others too.
Thanks,
Ajay Dubedi

All Answers

Meenu MathewMeenu Mathew
Hi Rajeshwari,

Please refer the below link.

https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_json_jsonparser.htm
https://developer.salesforce.com/forums/?id=9060G000000BhCbQAK
https://salesforce.stackexchange.com/questions/9328/how-to-parse-the-json-object-in-salesforce

Thanks
Ajay K DubediAjay K Dubedi
Hi Rajeshwari,
Your JSON is not valid firstly please remove ','  after "B" : "C" from your JSON and then remove extra spaces from your JSON.
For remove extra spaces follow this link:
https://codebeautify.org/remove-extra-spaces
Try this to extract the value of D from your JSON: 
string JsonStr = '{ "A" : [{ "B" : "C" }, { "B" : { "D" : "E" } }] }';
Map<String, Object> MapOne = (Map<String, Object>) JSON.deserializeUntyped(JsonStr);
List<Object> listOne = new List<Object>();
Map<String,Object> MapThree = new Map<String,Object>();
if(MapOne.containsKey('A')) {
    listOne = (List<object>) MapOne.get('A');
}
System.debug('listOne------' + listOne);
Map<String,Object> MapTwo = new Map<String,Object>();
for(object obj : listOne)
{
    MapTwo = (Map<String,Object>)obj; 
    system.debug('MapTwo----' + MapTwo);
}
system.debug('MapTwo----' + MapTwo);
if(MapTwo.containsKey('B')) {
    MapThree = (Map<String,Object>) MapTwo.get('B');
}
system.debug('MapThree----' + MapThree);
if(MapThree.containsKey('D')) {
    system.debug('Value Of D is ---- ' + MapThree.get('D'));
}

I hope you find the above solution helpful. If it does, please mark as Best Answer to help others too.
Thanks,
Ajay Dubedi
This was selected as the best answer