Give an example how JSON text can be read in Java using JSON.simple APIs and parser?
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Give an example how JSON text can be read in Java using JSON.simple APIs and parser?
Best answer
Consider the following text in JSON file emp.json for reading:
{
“empname”:”James”,
“age”: 25,
“location”:”Bangalore”,
“skills”:[“Java”, “Spring”, “Hibernate”, “WebServices”]
}
To read this file in Java, first JSON.simple API and parsers have to be installed. The following Java code will read the content from JSON file and display appropriately.
public class JsonExample {
public static void main(String[] args) {
// Parser from JSON.simple
JSONParser parser = new JSONParser();
try {
Object obj = parser.parse(new FileReader("c:\\Users\\username\\Desktop\\emp.json"));
// JSONObject - API from JSON.simple
JSONObject jsonObject = (JSONObject) obj;
String empname = (String)jsonObject.get("empname");
System.out.println(empname);
long age = (Long) jsonObject.get("age");
System.out.println(age);
String location = (String) jsonObject.get("location");
System.out.println(location);
// JSONArray - API for array
JSONArray skills = (JSONArray) jsonObject.get("skills");
Iterator<String> iterator = skills.iterator();
while (iterator.hasNext()) {
System.out.println(iterator.next());
}
} catch (FileNotFoundException e) { e.printStackTrace(); }
catch (IOException e) { e.printStackTrace(); }
catch (ParseException e) { e.printStackTrace(); }
}
}
