How to use JWT using JJWT with Play Framework Java? - jwt

Question

I am trying to use Zoom API which requires using JWT. I have successfully using node.js to generate JWT and call the Zoom API like this:
var jwt = require('jsonwebtoken');
var zoom_key = "abcd";
var zoom_secret = "efgh";
var payload = {
iss: Zoom_Key,
exp: ((new Date()).getTime() + 3600)
};
//Automatically creates header, and returns JWT
var token = jwt.sign(payload, zoom_secret);
module.exports = token;
However, right now I am trying to use the same way in JAVA. When I using the token by JJWT, it always give the the "invalid token" error message from zoom api. Can any one help me figure out the reason?
First, I create a Playload class in Playload.java like this:
// in Playload.java
package palyload;
public class Playload {
public String iss;
public Playload(String iss) {
this.iss = iss;
}
}
Second,
I import JJWT and play.libs.Json to generate JWT token like this:
package controllers;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import play.libs.Json;
import play.mvc.Controller;
import play.mvc.Result;
import palyload.Playload;
public class JWT extends Controller {
private static final String zoom_key = "abcd";
private static final String zoom_secret = "efgh";
private static final String baseUrl = "https://api.zoom.us/v2/users/?access_token=";
public String setToken (Object obj) {
String token = "";
Map<String, Object> map = new HashMap<>();
map.put("json", Json.toJson(obj));
try {
token = Jwts.builder()
.setClaims(map)
.setExpiration(Date.from(ZonedDateTime.now(ZoneId.systemDefault()).plusSeconds(3600).toInstant()))
.signWith(SignatureAlgorithm.HS256, zoom_secret)
.compact();
} catch (ArrayIndexOutOfBoundsException e) {
e.printStackTrace();
}
System.out.println(Jwts.parser().setSigningKey(zoom_secret).parseClaimsJws(token).getBody().getSubject().toString());
// System.out.println(map.toString());
return token;
}
public String getToken () {
Playload pl = new Playload(zoom_key);
System.out.println("playload: " + Json.toJson(pl).toString());
return setToken(pl);
}
public String setUrl () {
return baseUrl + getToken();
}
public Result getUrl () {
return ok(setUrl());
}
}
Have no idea why this token url is not correct like Node.js one?