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How to parse a JSON string using Streaming API in Java?
The Streaming API consists of an important interface JsonParser and this interface contains methods to parse JSON in a streaming way and provides forward, read-only access to JSON data. The Json class contains the methods to create parsers from input sources. We can parse a JSON using the static method createParser() of Json class.
Syntax
public static JsonParser createParser(Reader reader)
Example
import java.io.*;
import javax.json.Json;
import javax.json.stream.JsonParser;
import javax.json.stream.JsonParser.Event;
public class JSONParseringTest {
public static void main(String[] args) {
String jsonString = "{\"name\":\"Adithya\",\"employeeId\":\"115\",\"age\":\"30\"}";
JsonParser parser = Json.createParser(new StringReader(jsonString));
while(parser.hasNext()) {
Event event = parser.next();
if(event == Event.KEY_NAME) {
switch(parser.getString()) {
case "name":
parser.next();
System.out.println("Name: " + parser.getString());
break;
case "employeeId":
parser.next();
System.out.println("EmployeeId: " + parser.getString());
break;
case "age":
parser.next();
System.out.println("Age: " + parser.getString());
break;
}
}
}
}
}Output
Name: Adithya EmployeeId: 115 Age: 30
Updated on: 07-Jul-2020
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