JSON parsing using Gson for Java

java json gson
Martynas picture Martynas · Mar 30, 2011 · Viewed 347.2k times · Source

I would like to parse data from JSON which is of type String. I am using Google Gson.

I have:

jsonLine = "
{
 "data": {
  "translations": [
   {
    "translatedText": "Hello world"
   }
  ]
 }
}
";

and my class is:

public class JsonParsing{

   public void parse(String jsonLine) {

      // there I would like to get String "Hello world"

   }

}

Answer

MByD picture MByD · Mar 30, 2011

This is simple code to do it, I avoided all checks but this is the main idea.

 public String parse(String jsonLine) {
    JsonElement jelement = new JsonParser().parse(jsonLine);
    JsonObject  jobject = jelement.getAsJsonObject();
    jobject = jobject.getAsJsonObject("data");
    JsonArray jarray = jobject.getAsJsonArray("translations");
    jobject = jarray.get(0).getAsJsonObject();
    String result = jobject.get("translatedText").getAsString();
    return result;
}

To make the use more generic - you will find that Gson's javadocs are pretty clear and helpful.

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