Java: get json from http url (using JSON.org api)

Question

Im currently trying to receive this url in java (https://api.wynncraft.com/public_api.php?action=items&command=75)

The problem is, I can read any file ending in .json perfectly, but because of the .php (I think) it isnt working for this one. Also, if someone could tell me how to get things like item_name into variables I can use? Would be great...

My code:

URL u;
        try {
            u = new URL("https://api.wynncraft.com/public_api.php?action=items&command=75");

            URLConnection c = u.openConnection();
            InputStream r = c.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(r));
            for (String line; (line = reader.readLine()) != null;)
                System.out.println(line);
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

What exactly is the issue?

Danny Kopping
– Danny Kopping

2015-05-01 15:41:38 +00:00
Commented May 1, 2015 at 15:41 — Danny Kopping
– Danny Kopping, Commented May 1, 2015 at 15:41

Barett · Accepted Answer · 2015-05-01 18:43:38Z

1

Download the json.api JAR from http://mvnrepository.com/artifact/org.json/json (or use Maven)
Change your code to read the entire string, not just a line.

Then do something like this to get at the values you want.

import org.json.*;

JSONParser JSON = new JSONParser();
JSONObject obj = JSON.parse(line);

String hr0 = obj.getJSONObject("0")
        .getJSONObject("Identification")
        .getString("health_regen");

edited May 1, 2015 at 18:43

answered May 1, 2015 at 15:57

Barett

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Comments

Misunderstood · Accepted Answer · 2015-05-01 15:42:08Z

This is a little cryptic, buy you should be able ascertain the variable values.

This is how the JSON would be structured if you were to use PHP:

$json = json_decode($data,true);

k1, k2 denote the level with in the structure.

-------------------------------
k0 request => array( 
  k1: timestamp => integer:  $json['request']['timestamp'] => 1430494697
  k1: ip => string:  $json['request']['ip'] => 108.162.210.100
)
-------------------------------
k0 0 => array( 
  k1: item_name => string:  $json[0]['item_name'] => Bob's Mythic Bow
  k1: item_type => string:  $json[0]['item_type'] => Legendary
  k1: item_minecraft => string:  $json[0]['item_minecraft'] => Bow
  k1: item_min_lvl => string:  $json[0]['item_min_lvl'] => 75
  k1 identification => array(
    k2: health_regen => string:  $json[0]['identification']['health_regen'] => 1.5
    k2: mana_regen => string:  $json[0]['identification']['mana_regen'] => 1
    k2: spell_dam => string:  $json[0]['identification']['spell_dam'] => 30%
    k2: life_steal => string:  $json[0]['identification']['life_steal'] => 0.4
    k2: mana_steal => string:  $json[0]['identification']['mana_steal'] => 1
    k2: xp_bonus => string:  $json[0]['identification']['xp_bonus'] => 20%
    k2: loot_bonus => string:  $json[0]['identification']['loot_bonus'] => 20%
  )
  k1: min_dam => string:  $json[0]['min_dam'] => 566
  k1: max_dam => string:  $json[0]['max_dam'] => 463
)
-------------------------------
k0 1 => array( 
  k1: item_name => string:  $json[1]['item_name'] => Bob's Mythic Daggers
  k1: item_type => string:  $json[1]['item_type'] => Legendary
  k1: item_minecraft => string:  $json[1]['item_minecraft'] => Shears
  k1: item_min_lvl => string:  $json[1]['item_min_lvl'] => 75
  k1 identification => array(
    k2: health_regen => string:  $json[1]['identification']['health_regen'] => 1.5
    k2: mana_regen => string:  $json[1]['identification']['mana_regen'] => 1
    k2: spell_dam => string:  $json[1]['identification']['spell_dam'] => 30%
    k2: life_steal => string:  $json[1]['identification']['life_steal'] => 0.4
    k2: mana_steal => string:  $json[1]['identification']['mana_steal'] => 1
    k2: xp_bonus => string:  $json[1]['identification']['xp_bonus'] => 20%
    k2: loot_bonus => string:  $json[1]['identification']['loot_bonus'] => 20%
  )
  k1: min_dam => string:  $json[1]['min_dam'] => 420
  k1: max_dam => string:  $json[1]['max_dam'] => 389
)
-------------------------------
k0 2 => array( 
  k1: item_name => string:  $json[2]['item_name'] => Bob's Mythic Spear
  k1: item_type => string:  $json[2]['item_type'] => Legendary
  k1: item_minecraft => string:  $json[2]['item_minecraft'] => Shovel
  k1: item_min_lvl => string:  $json[2]['item_min_lvl'] => 75
  k1 identification => array(
    k2: health_regen => string:  $json[2]['identification']['health_regen'] => 1.5
    k2: mana_regen => string:  $json[2]['identification']['mana_regen'] => 1
    k2: spell_dam => string:  $json[2]['identification']['spell_dam'] => 30%
    k2: life_steal => string:  $json[2]['identification']['life_steal'] => 0.4
    k2: mana_steal => string:  $json[2]['identification']['mana_steal'] => 1
    k2: xp_bonus => string:  $json[2]['identification']['xp_bonus'] => 20%
    k2: loot_bonus => string:  $json[2]['identification']['loot_bonus'] => 20%
  )
  k1: min_dam => string:  $json[2]['min_dam'] => 368
  k1: max_dam => string:  $json[2]['max_dam'] => 311
)
-------------------------------
k0 3 => array( 
  k1: item_name => string:  $json[3]['item_name'] => Bob's Mythic Wand
  k1: item_type => string:  $json[3]['item_type'] => Legendary
  k1: item_minecraft => string:  $json[3]['item_minecraft'] => Stick
  k1: item_min_lvl => string:  $json[3]['item_min_lvl'] => 75
  k1 identification => array(
    k2: health_regen => string:  $json[3]['identification']['health_regen'] => 1.5
    k2: mana_regen => string:  $json[3]['identification']['mana_regen'] => 1
    k2: spell_dam => string:  $json[3]['identification']['spell_dam'] => 30%
    k2: life_steal => string:  $json[3]['identification']['life_steal'] => 0.4
    k2: mana_steal => string:  $json[3]['identification']['mana_steal'] => 1
    k2: xp_bonus => string:  $json[3]['identification']['xp_bonus'] => 20%
    k2: loot_bonus => string:  $json[3]['identification']['loot_bonus'] => 20%
  )
  k1: min_dam => string:  $json[3]['min_dam'] => 278
  k1: max_dam => string:  $json[3]['max_dam'] => 204
)

#################################################################

Summary of Array Constructs With Output Type

#################################################################

1 $json[int]['identification']['health_regen'] string
1 $json[int]['identification']['mana_regen'] string
1 $json[int]['identification']['spell_dam'] string
1 $json[int]['identification']['life_steal'] string
1 $json[int]['identification']['mana_steal'] string
1 $json[int]['identification']['xp_bonus'] string
1 $json[int]['identification']['loot_bonus'] string

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