How do I serialize a JSON object?

Question

I have the following JSON string.

{"portfolio":"HEXGENFUND","transSrlNo":"1","transCode":"BUY","investReason":"009","inflowOutflow":"I","transDate":"2012-09-01","tradeDate":"2012-09-01","tradeDateUpto":"2012-09-01","tradeTime":"15:46:36","investCategory":"FVTPL","custodian":"DEUTSCHE","holdType":"HOLD","securityType":"INV","security":"9.45SBAI160326","assetClass":"NCD","issuer":"SBAI","marketType":"LIM","tradePriceType":"R","requisitionType":"MS","priceFrom":"343490934332","priceTo":"343490934332","marketPrice":"343490934332","averagePrice":"343490934332","price":"343490934332","quantity":"234","grossAmtTcy":"80376878633688","exchRate":"1","grossAmtPcy":80376878633688,"grossIntTcy":"992.42","grossIntPcy":992.42,"netAmountTcy":80376878634680.42,"netAmountPcy":80376878634680.42,"acquCostTcy":80376878633688,"acquCostPcy":80376878633688,"yieldType":"N","purchaseYield":"0","marketYield":"0","ytm":"-80.07453968","mduration":"0","currPerNav":"0","desiredPerNav":"0","currHolding":"0","noofDays":"0","realGlPcy":0,"realGlTcy":"0","nowLater":"N","isAllocable":"false","acquCostReval":0,"acquCostHisTcy":80376878633688,"acquCostHisPcy":0,"exIntTcy":0,"exIntPcy":0,"accrIntReval":0,"accrIntTcy":0,"accrIntPcy":0,"grossAodTcy":0,"grossAodPcy":0,"grossAodReval":0,"bankAccAmtAcy":80376878634680.42,"bankAccAmtPcy":80376878634680.42,"taxAmountTcy":0,"unrelAmortTcy":0,"unrelAmortPcy":0,"unrelGlTcy":0,"unrelGlPcy":0,"realGlHisTcy":0,"realGlHisPcy":0,"tradeFeesTcy":0,"tradeFeesPcy":0}

I have a POJO for the above.

How do I deserialize this to a Object?

see http://stackoverflow.com/questions/338586/a-better-java-json-library — Jesper, Apr 12 '13 at 11:01
1. http://www.json.org/ 2. scroll down until you see "Java" 3. pick and download a library — Tim S., Apr 12 '13 at 11:01
possible duplicate of [Converting JSON to Java](http://stackoverflow.com/questions/1688099/converting-json-to-java) — Jesper, Apr 12 '13 at 11:02
Are there any restrictions? Is `String json = "{\"portfolio\":\"HEXGENFUND\",\"transSrlNo\":\"1\",\"transCode\":\"BUY\",..."` what you're looking for? — John Dvorak, Apr 12 '13 at 11:02
Great guys i have edited my question. Please have a look at it. — Java Questions, Apr 12 '13 at 11:20

anubhava · Answer 1 · 2013-04-15T07:12:22.647

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You can use gson library like this to convert above JSON string to HashMap:

Gson gson = new Gson(); // get a new Gson instance

// define a Type for Map<String, String>
Type type = new TypeToken<Map<String, String>>(){}.getType();

// convert JSON string to a Map<String, String> instance
Map<String, String> map = gson.fromJson(jsonStr, type);

EDIT (Based your Edited question): For converting JSON to your POJO object

You can convert JSON string to your custom POJO using gson like this:

// assuming your POJO is of type MyClass
MyClass instance = gson.fromJson(jsonStr, MyClass.class);

edited Apr 15 '13 at 07:12

answered Apr 12 '13 at 11:04

anubhava

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AFAIK this is the simplest way to do it. and the GSON library is fairly comprehensive. – Aditya Apr 18 '13 at 05:36

score 3 · Answer 2 · answered Apr 12 '13 at 11:02

If you want to generate the matching java class for the above json string, going with a json generator would be the best solution since the data has many fields.

You may check http://www.jsonschema2pojo.org/

Just paste your json, select JSON as source type and you will have a Jackson compatible annotated java class.

Alepac · Answer 3 · 2013-04-12T13:55:18.480

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Thake a look at this library tutorial: jackson

String myJson = new org.codehaus.jackson.map.ObjectMapper.writeValueAsString(myObject);

edited Apr 12 '13 at 13:55

answered Apr 12 '13 at 11:03

Alepac

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score 2 · Answer 4 · answered Apr 12 '13 at 11:02

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There are some JSON libraries that may helps you. For example, Gson is a Java library that can be used to convert Java Objects into their JSON representation. It can also be used to convert a JSON string to an equivalent Java object

answered Apr 12 '13 at 11:02

Miguel Prz

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score 2 · Answer 5 · answered Apr 12 '13 at 11:02

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You can create JSON object by using libraries like gson or JsonOrg. You can take a lokk at the following links for libraries and implementations

https://sites.google.com/site/gson/gson-user-guide
http://code.google.com/p/google-gson/
http://json.org/java/

answered Apr 12 '13 at 11:02

karthick

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Dont't forget net.sf.json http://json-lib.sourceforge.net/apidocs/jdk15/net/sf/json/JSONObject.html – Nikola Yovchev Apr 12 '13 at 11:04

How do I serialize a JSON object?

5 Answers5

EDIT (Based your Edited question): For converting JSON to your POJO object