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javajsonloopsparsingjavabeans
Dannyvas
Dannyvas

Reputation: 101

How to iterate over a JsonArray in Java (not java 8)

I would like to iterate over an array in this Json object:

{
  "id": "2234",
  "Messages": [
    {
      "MessageId": 321231239,
      "Text_message": "my text message",
      "date": 1444666348
    },
    {
      "MessageId": 3217437239,
      "Text_message": "my text message 2",
      "date": 1444666348
    }
  ]
}

in my code I have:

JsonArray messagesJson = jsonObject.getJsonArray("Messages");

my imports related to this are:

import javax.json.Json;
import javax.json.JsonArray;
import javax.json.JsonObject;
import javax.json.JsonReader;

Now I want to iterate over this array and extract fields for my bean. But I don't want to use the for loop with index. I want to use a foreach type of loop. I am working with Java 7. What I want is something that is more like the Scala way of doing it:

messagesJson.map { json => 
    MyBean(
        (json \ "MessageId").getOrElse(""),
        (json \ "text_message").getOrElse(""),
        (json \ "date").getOrElse("")
    )
}

Upvotes: 0

Views: 2892

Answers (1)

FMiscia
FMiscia

Reputation: 223

As the documentation says, JsonArray extends List<JsonValue> so you can simply iterate over JsonValue.

for(JsonValue value : yourJsonArray){
....
}

Upvotes: 2

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