Jwt配置及使用 +外部配置文件

• 导入依赖

     
            com.auth0
            >java-jwt
            3.4.0
        

        
        
            com.alibaba
            fastjson
            1.2.78
        

• 复制下面Util代码

@Slf4j
public class JwtUtil {
    //过期时间 30min
    private static int EXPIRE_TIME;
    //私钥
    private static String TOKEN_SECRET;
    private static String USER_NAME;
    static {

        ResourceBundle bundle = ResourceBundle.getBundle("jwt");
        EXPIRE_TIME =Integer.parseInt( bundle.getString("EXPIRE_TIME"));
        TOKEN_SECRET = bundle.getString("TOKEN_SECRET");
        USER_NAME = bundle.getString("USER_NAME");
    }


    
    public static String createToken(User user) {

        Calendar nowTime = Calendar.getInstance();
        nowTime.add(Calendar.MINUTE, EXPIRE_TIME);
        Date expiresDate = nowTime.getTime();
        String  userJson = JSON.toJSONString(user);
        return JWT.create().withAudience(user.getId()+"")   //签发对象
                .withIssuedAt(new Date())    //发行时间
                .withExpiresAt(expiresDate)  //有效时间
                .withClaim(USER_NAME,userJson)    //载荷，随便写几个都可以
                .sign(Algorithm.HMAC256(user.getId()+TOKEN_SECRET));   //加密
    }
    
    public static void verifyToken(String token, String secret) {
        try {
            JWTVerifier verifier = JWT.require(Algorithm.HMAC256(secret+TOKEN_SECRET)).build();
            verifier.verify(token);
        } catch (Exception e) {
            //效验失败
            //自定义的一个异常

        }
    }
    
    public static User getAudience(String token)  {
        User user = null;
        try {
            String tokenJson = JWT.decode(token).getClaim(USER_NAME).asString();
            user = JSON.parseObject(tokenJson,User.class);
        } catch (JWTDecodeException j) {
            //这里是token解析失败
            log.error(j.getMessage(),j);
            return null;
        }
        return user;
    }

    public static void main(String[] args) {
        User user = new User();
        user.setId(1);
        user.setName("王五");
        String token = createToken(user);
        System.out.println(token);
        System.out.println(getAudience(token));
    }
}

• 配置文件 jwt.properties

# 失效时间
EXPIRE_TIME = 30
# 秘钥
TOKEN_SECRET = "privateKey"
# 加密方式
USER_NAME = "name

    static {
    //配置文件名称
        ResourceBundle bundle = ResourceBundle.getBundle("jwt");
        //配置文件里面相应的内容 可以直接通过改配置文件 修改秘钥等等
        EXPIRE_TIME =Integer.parseInt( bundle.getString("EXPIRE_TIME"));
        TOKEN_SECRET = bundle.getString("TOKEN_SECRET");
        USER_NAME = bundle.getString("USER_NAME");
    }

@Slf4j
@Component
public class JwtUtil {
    //第一种
    //过期时间 30min
    private static int EXPIRE_TIME;
    //私钥
    private static String TOKEN_SECRET;
    private static String USER_NAME;


    //第二种配置方式 直接在yml里面配置变量
    //过期时间 30min
    @Value("${jwt.expireTime}")
    private static int expireTime;
    //私钥
    @Value("${jwt.tokenSecret}")
    private static String tokenSecret;


    static {
        ResourceBundle bundle = ResourceBundle.getBundle("jwt");
        EXPIRE_TIME =Integer.parseInt( bundle.getString("EXPIRE_TIME"));
        TOKEN_SECRET = bundle.getString("TOKEN_SECRET");
        USER_NAME = bundle.getString("USER_NAME");
    }


    
    public static String createToken(User user) {
        Calendar nowTime = Calendar.getInstance();
        nowTime.add(Calendar.MINUTE, expireTime);
        Date expiresDate = nowTime.getTime();
        String  userJson = JSON.toJSONString(user);
        return JWT.create().withAudience(user.getId()+"")   //签发对象
                .withIssuedAt(new Date())    //发行时间
                .withExpiresAt(expiresDate)  //有效时间
                .withClaim(USER_NAME,userJson)    //载荷，随便写几个都可以
                .sign(Algorithm.HMAC256(user.getId()+tokenSecret));   //加密
    }
    
    public static void verifyToken(String token, String secret) {
        try {
            JWTVerifier verifier = JWT.require(Algorithm.HMAC256(secret+tokenSecret)).build();
            verifier.verify(token);
        } catch (Exception e) {
            //效验失败
            //自定义的一个异常

        }
    }
    
    public static User getAudience(String token)  {
        User user = null;
        try {
            String tokenJson = JWT.decode(token).getClaim(USER_NAME).asString();
            user = JSON.parseObject(tokenJson,User.class);
        } catch (JWTDecodeException j) {
            //这里是token解析失败
            log.error(j.getMessage(),j);
            return null;
        }
        return user;
    }

    public static void main(String[] args) {
        User user = new User();
        user.setId(1);
        user.setName("王五");
        String token = createToken(user);
        System.out.println(token);
        System.out.println(getAudience(token));
    }
}

# jwt自定义配置
jwt:
  expireTime: 30
  tokenSecret: qcbcyKey