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JsonParserSimpleEx.java
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64 lines (43 loc) · 1.79 KB
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package com.zetcode;
import javax.json.Json;
import javax.json.stream.JsonParser;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.nio.charset.StandardCharsets;
public class JsonParserSimpleEx {
public static void main(String[] args) throws FileNotFoundException {
var is = new FileInputStream("src/main/resources/users.json");
var factory = Json.createParserFactory(null);
var parser = factory.createParser(is, StandardCharsets.UTF_8);
if (!parser.hasNext() && parser.next() != JsonParser.Event.START_ARRAY) {
return;
}
while (parser.hasNext()) {
var event = parser.next();
// starting object
if (event == JsonParser.Event.START_OBJECT) {
// looping over object attributes
while (parser.hasNext()) {
event = parser.next();
if (event == JsonParser.Event.KEY_NAME) {
var key = parser.getString();
switch (key) {
case "name":
parser.next();
System.out.printf("Name: %s%n", parser.getString());
break;
case "occupation":
parser.next();
System.out.printf("Occupation: %s%n", parser.getString());
break;
case "born":
parser.next();
System.out.printf("Born: %s%n%n", parser.getString());
break;
}
}
}
}
}
}
}