Converting JSON string to Java Object: Java

Question

I have a String

String aString = "[{code:32022,estCode:0,timeZone:CE},{code:59400,estCode:0,timeZone:CE},{code:59377,estCode:0,timeZone:CE},{code:59525,estCode:0,timeZone:CE},{code:59560,estCode:0,timeZone:CE}]"

I am trying to convert this string to Map[] using gson.

I tried using

Gson gsn = new GsonBuilder().create();
Map[] b = gsn.fromJson(aString , Map[].class);

I am able to parse it properly and I am getting output as

[{code=32022.0, estCode=0.0, timeZone=CE}, {code=59400.0, estCode=0.0, timeZone=CE}, {code=59377.0, estCode=0.0, timeZone=CE}, {code=59525.0, estCode=0.0, timeZone=CE}, {code=59560.0, estCode=0.0, timeZone=CE}]

but the values are converted to double i need it as String. Ex: 32022 is converted to 32022.0 i need it as 32022 is there any way i can do it using ExclusionStrategy in gson. I am seeing only two methos availalbe in ExclusionStrategy, shouldSkipClass and shouldSkipField is there any other way to do it using gson.

Please help

• Tschallacka: Possible duplicate of Gson. Deserialize integers as integers and not as doubles
• Nikhi K. Bansal: map follow key value but you have 3 attribute in your json element {code:32022,estCode:0,timeZone:CE}, what kind of map you want.
• anonymous: @NikhiK.Bansal It is Map[]
• anonymous: @MichaelDibbets Is there any way to do it using gson
• Kishan Vaghela: What is type of "code" field in Map object String or double? Can you provide code of Map Object.?

Answer 1

There is no way to change the type of the values, but you could use an own class for that like this:

public static void main(String[] args) {
 String aString = "[{code:32022,estCode:0,timeZone:CE},{code:59400,estCode:0,timeZone:CE},{code:59377,estCode:0,timeZone:CE},{code:59525,estCode:0,timeZone:CE},{code:59560,estCode:0,timeZone:CE}]";
 Gson gsn = new GsonBuilder().create();
 TimeCode[] b = gsn.fromJson(aString, TimeCode[].class);
 for(TimeCode entry:b){
 System.out.print(entry+",");
 }
 }
 class TimeCode{
 String code;
 String estCode;
 String timeZone;
 public String toString(){
 return "code="+code+",estCode="+estCode+",timeZone="+timeZone;
 }
 }

Output:

code=32022,estCode=0,timeZone=CE,code=59400,estCode=0,timeZone=CE,code=59377,estCode=0,timeZone=CE,code=59525,estCode=0,timeZone=CE,code=59560,estCode=0,timeZone=CE,

I hope it helps.