5 JSON libraries Java JEE Programmer should know ( list).Other JSON tutorials for Java programmers The good thing about json-simple is that it is also JDK 1.2 compatible, which means you can use it on a legacy project which is not yet in Java 5. JSONObject json = (JSONObject) parser.parse(stringToParse) The good thing about this library is its small size, which is perfect for memory constraint environments like J2ME and Android. The JSON-Simple is another open-source library that supports JSON parsing and formatting. JSON String to Java object using JSON-Simple The good thing about Gson is that it's feature-rich and comes from Google, which is known for performance.Ģ. You can also convert a Java object to JSON by using the toJson() method as shown below Player p = g.fromJson(jsonString, Player.class) You can convert JSON String to Java object in just 2 lines by using Gson as shown below : It comes from none other than Google, which is also behind Guava, a common purpose library for Java programmers. The Gson is an open-source library to deal with JSON in Java programs. One attribute, lastScore is a JSON array. It's simple, has 5 attributes, two of which are String and the other two are numeric.
#CONVERT STRING TO JSON OBJECT HOW TO#
In this tutorial, you will learn how to use these 3 main libraries to do this conversion with step-by-step examples.Įven though you can use a simple or complex JSON String with lots of attributes and JSON arrays, I'll use the following JSON String for example purpose: Fortunately, there are many open-source libraries which allows you to create JSON object from JSON formatted String like Gson from Google, Jackson, and json-simple. retrieve any field or set different values.
Keeping JSON as String always is not a good option because you cannot operate on it easily, you need to convert it into a JSON object before you do anything else e.g. It's very common nowadays to receive JSON String from a Java web service instead of XML, but unfortunately, JDK doesn't yet support conversion between JSON String to JSON object.
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