[EDIT] MEJORA DE TOKEN

src/main/java/web/multitask/trismegistoservices/api/JWTokenApi.java

 package web.multitask.trismegistoservices.api;
 
-
 import org.json.JSONObject;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.userdetails.UserDetails;
@@ -9,15 +8,13 @@ import web.multitask.trismegistoservices.model.User;
 import web.multitask.trismegistoservices.repository.UserRepository;
 import web.multitask.trismegistoservices.singleton.TokenSingleton;
 import web.multitask.trismegistoservices.utils.JWTokenUtil;
-
 import java.math.BigInteger;
+import java.text.SimpleDateFormat;
+import java.util.Date;
 import java.util.Objects;
-import java.util.concurrent.atomic.AtomicBoolean;
-
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 
-
 @RestController
 @RequestMapping("/token")
 @CrossOrigin
@@ -124,8 +121,14 @@ class JWTokenApi {
     public ResponseEntity<?> remainingTime(@RequestBody String token) {
         JSONObject json = new JSONObject(token);
         try {
-            int remaining = jwtTokenUtil.getExperyTime(json.getString("token"));
-            return ResponseEntity.ok(new JSONObject().put("remaining", remaining).put("message", "OK").put("status", true).toMap());
+            Long remaining = jwtTokenUtil.getExperyTime(json.getString("token"));
+            Date expirationDate = new Date(System.currentTimeMillis() + remaining);
+            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+            return ResponseEntity.ok(new JSONObject()
+                    .put("remaining", remaining)
+                    .put("message", "OK")
+                    .put("expiration", dateFormat.format(expirationDate))
+                    .put("status", true).toMap());
         } catch (Exception e) {
             return ResponseEntity.status(401).body(new JSONObject().put("remaining", 0).put("message", "Invalid Token").put("status", false).toMap());
         }
@@ -136,8 +139,8 @@ class JWTokenApi {
         JSONObject json = new JSONObject(data);
         try {
             boolean onelife = json.optBoolean("onelife", false);
-            int ms = json.optInt("ms", 3600000);
-            String tokenized = jwtTokenUtil.tokenizeData(data, BigInteger.valueOf(ms), onelife);
+            BigInteger ms = json.optBigInteger("ms", BigInteger.valueOf(3600000));
+            String tokenized = jwtTokenUtil.tokenizeData(data, ms, onelife);
             if(onelife){
                 tokenSingleton.addToken(tokenized);
             }

src/main/java/web/multitask/trismegistoservices/utils/JWTokenUtil.java

@@ -25,26 +25,28 @@ public class JWTokenUtil implements Serializable{
     TokenSingleton tokenSingleton = new TokenSingleton();
 
     public String generateToken(User user, BigInteger ms,boolean onelife) {
+        JSONObject json = new JSONObject();
+        json.put("username", user.getUsername());
+
         if(ms == null){
             ms = BigInteger.valueOf(3600000);
         }
-        Date now = new Date();
-        Date expiryDate = new Date(now.getTime() + ms.longValue());
-        JSONObject json = new JSONObject();
-        json.put("username", user.getUsername());
+        Date expirationDate = new Date(System.currentTimeMillis() + ms.longValue());
+
         return Jwts.builder()
                 .setSubject(json.toString()) 
                 .setIssuedAt(new Date())
-                .setExpiration(expiryDate)
+                .setExpiration(expirationDate)
                 .signWith(Keys.hmacShaKeyFor(onelife ? jwtSecret2.getBytes() : jwtSecret.getBytes()))
                 .compact();
     }
 
     public String tokenizeData(String data, BigInteger ms,boolean onelife){
+        Date expirationDate = new Date(System.currentTimeMillis() + ms.longValue());
         return Jwts.builder()
                 .setSubject(data)
                 .setIssuedAt(new Date())
-                .setExpiration(new Date(new Date().getTime() + ms.longValue()))
+                .setExpiration(expirationDate)
                 .signWith(Keys.hmacShaKeyFor(onelife ? jwtSecret2.getBytes() : jwtSecret.getBytes()))
                 .compact();
     }
@@ -133,8 +135,7 @@ public class JWTokenUtil implements Serializable{
                     .build()
                     .parseClaimsJws(token)
                     .getBody()
-                    .getExpiration()
-                    .before(new Date());
+                    .getExpiration();
             return false;
         } catch (Exception e) {
             try {
@@ -143,8 +144,7 @@ public class JWTokenUtil implements Serializable{
                         .build()
                         .parseClaimsJws(token)
                         .getBody()
-                        .getExpiration()
-                        .before(new Date());
+                        .getExpiration();
                 return false;
             } catch (Exception e2) {
                 System.out.println(e2.getMessage());
@@ -153,9 +153,9 @@ public class JWTokenUtil implements Serializable{
         }
     }
 
-    public int getExperyTime(String token){
+    public Long getExperyTime(String token){
         try{
-            return (int) ((Jwts.parserBuilder()
+            return  ((Jwts.parserBuilder()
                     .setSigningKey(Keys.hmacShaKeyFor(jwtSecret.getBytes()))
                     .build()
                     .parseClaimsJws(token)
@@ -163,18 +163,13 @@ public class JWTokenUtil implements Serializable{
                     .getExpiration()
                     .getTime() - new Date().getTime()));
         }catch (Exception e){
-            try{
-                return (int) ((Jwts.parserBuilder()
-                        .setSigningKey(Keys.hmacShaKeyFor(jwtSecret2.getBytes()))
-                        .build()
-                        .parseClaimsJws(token)
-                        .getBody()
-                        .getExpiration()
-                        .getTime() - new Date().getTime()));
-            }catch (Exception e2){
-                System.out.println(e2.getMessage());
-                return 0;
-            }
+            return ((Jwts.parserBuilder()
+                    .setSigningKey(Keys.hmacShaKeyFor(jwtSecret2.getBytes()))
+                    .build()
+                    .parseClaimsJws(token)
+                    .getBody()
+                    .getExpiration()
+                    .getTime() - new Date().getTime()));
         }
     }
 }
\ No newline at end of file