Java – Parsing JSON Data from a URL
For this example I used a Java Toolkit: json-simple, you can download it here: https://code.google.com/p/json-simple/downloads/list
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/*
* @author: Carlo Fontanos
* @author_url: carlofontanos.com
*
* A simple code snippet for parsing JSON data from a URL
*/
package api;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
public class JsonParser {
public static void main(String[] args) {
JSONParser parser = new JSONParser();
try {
URL oracle = new URL(“https://carlofontanos.com/api/tutorials.php?data=all”); // URL to Parse
URLConnection yc = oracle.openConnection();
BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null) {
JSONArray a = (JSONArray) parser.parse(inputLine);
// Loop through each item
for (Object o : a) {
JSONObject tutorials = (JSONObject) o;
Long id = (Long) tutorials.get(“ID”);
System.out.println(“Post ID : “ + id);
String title = (String) tutorials.get(“post_title”);
System.out.println(“Post Title : “ + title);
System.out.println(“n“);
}
}
in.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
}
}
}
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Contents of tutorials.php:
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<?php
header(“Access-Control-Allow-Origin: *”);
header(“Content-Type: application/json; charset=UTF-8”);
require_once( ‘../wp-load.php’ );
if( isset( $_GET[‘data’] ) && $_GET[‘data’] == ‘all’ ) {
$all_tutorials = array(
‘post_type’ => ‘post’,
‘post_status’ => ‘publish’,
‘posts_per_page’ => –1, // all
‘orderby’ => ‘title’,
‘order’ => ‘ASC’
);
$tutorials_data = get_posts( $all_tutorials );
echo json_encode( $tutorials_data );
}
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Result from NetBeans console:
