从 jwt 令牌中提取值

Question

我正在尝试创建一个新用户并使用 JWT 令牌对用户进行身份验证。正在创建令牌，但是当我尝试从令牌中提取值时，所有值都以 null 的形式返回。 jwtUtil.extractClaims() 应该从令牌中提取值，但所有值都是空值。

@GetMapping("/register/code/{token}")
public HashMap<String, Object> register(@PathVariable("token") String token, HttpServletResponse httpServletResponse) {
   HashMap<String, Object> response = new HashMap<>();
   System.out.println(token);
    if (!jwtUtil.isTokenExpired(token)){
        System.out.println("User");
        User user = new User(
                (String) jwtUtil.extractAllClaims(token).get("email"),
                (String) jwtUtil.extractAllClaims(token).get("phoneNumber"),
                (String) jwtUtil.extractAllClaims(token).get("ppUrl"),
                (String) jwtUtil.extractAllClaims(token).get("password")
        );
        System.out.println("User email "+jwtUtil.extractAllClaims(token).get("email"));
        String encodedPassword = passwordEncoder.encode(user.getPassword());
        // System.out.println(encodedPassword + " THIS IS THE ENCODED PASSWORD" +
        // authenticationRequest.getPassword());
        user.setPassword(encodedPassword);
        if (user.getProfilePicture() == null) {
            user.setProfilePicture("default.png");
        }
        User savedUser = userRepository.save(user);
        response.put("success", true);
        response.put("message", "User Registered is Succesfull");
        System.out.println("mail verified");
        try {
            httpServletResponse.sendRedirect("/app");
        } catch (IOException e) {
            e.printStackTrace();
        }
        return response;
    } else {
        response.put("success", false);
        response.put("message", "User Registered is not Succesfull!");
        return response;
    }
}

extractClaims()如下：

public Claims extractAllClaims(String token) {
    System.out.println(Jwts.parser().setSigningKey(secret).parseClaimsJws(token).getBody());
    return Jwts.parser().setSigningKey(secret).parseClaimsJws(token).getBody();
}

我还能如何从令牌中提取值。

编辑以添加令牌生成代码：

public String generateToken(User user) {
    Map<String, Object> claims = new HashMap<>();
    claims.put("user", user);
    return createToken(claims);
}

private String createToken(Map<String, Object> claims) {
    System.out.println("Claims inside createToken "+claims);
    return Jwts.builder().setClaims(claims).setIssuedAt(new Date(System.currentTimeMillis()))
           .setExpiration(new Date(System.currentTimeMillis() + 1000 * 60 * 60 * 10))
          .signWith(SignatureAlgorithm.HS256, secret).compact();
}

Answer 1

尝试使用 extractClaim 而不是 extractAllClaims。所以像这样:

public String extractUsername(String token) {
    return extractClaim(token, Claims::getSubject);
}

并创建方法 extractClaim:

public <T> T extractClaim(String token, Function<Claims, T> claimsResolver) {
    final Claims claims = extractAllClaims(token);
    return claimsResolver.apply(claims);
}

编辑：您应该在使用 setSubject:

执行 Jwts 构建器时添加用户

return Jwts.builder().setClaims(claims).setSubject(subject).setIssuedAt(new Date(System.currentTimeMillis()))
       .setExpiration(new Date(System.currentTimeMillis() + 1000 * 60 * 60 * 10))
      .signWith(SignatureAlgorithm.HS256, secret).compact();

Answer 2

您的代码的唯一问题是您将对象 (user) 添加到 Claims 并在 Claims 中调用对象的值而不用调用对象 (user).

首先你需要将物体拿在手中并从中获取信息。

尝试创建这样的用户：

System.out.println("User");
LinkedHashMap userVariables = jwtUtil.extractAllClaims(token)
                .get("user", LinkedHashMap.class);
User user = new User(
        (String) userVariables.get("email"),
        (String) userVariables.get("phoneNumber"),
        (String) userVariables.get("ppUrl"),
        (String) userVariables.get("password")
);

从 jwt 令牌中提取值

Extracting values from jwt token

spring

jwt

spring-boot

bearer-token

jjwt