I have some data
@Override
public String toString() {
return
"{" +
"id:" + id +
", title:'" + title + '\'' +
"}";
}
I need to convert in JSON for javascript. The data must return key and value which I can display in a document. I tried to use the method JSON.stringify and JSON.parse, but it converts in a string.
You can build and print your JSON by hand but you'll probably want to use SimpleJSON, Jackson 2 or GSON which will suit you better as the data gets more complex:
SimpleJSON: https://github.com/fangyidong/json-simple , JAR
GSON: https://github.com/google/gson , JAR
//Simple JSON
import org.json.simple.JSONObject;
//GSON
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
public class JSONExamples {
public static void main(String[] args) {
String id = "123";
String title = "Very Important Record";
//Simple JSON
JSONObject obj = new JSONObject();
obj.put("id", id);
obj.put("title", title);
System.out.println(obj);
//GSON
MyRecord myImportantRecord = new MyRecord(id, title);
Gson gson = new GsonBuilder().create();
gson.toJson(myImportantRecord, System.out);
}
}
MyRecord.java:
public class MyRecord {
private String id;
private String title;
MyRecord(String id, String title) {
this.id=id;
this.title=title;
}
}
From Java you can receive stringified JSON
and you can parse it using JSON.parse()
on javascript side to have it as a regular object.
Using Gson to convert Java object to JSON.
Gson gson = new Gson(); Staff obj = new Staff(); //Java object to JSON, and assign to a String String jsonInString = gson.toJson(obj);
JavaScript Side
var myObj = JSON.parse(this.responseText);
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