// 创建一个Map
Map<String, Object> infoMap = new HashMap<>();
infoMap.put("name", "Zebe");
infoMap.put("site", "www.zebe.me");
infoMap.put("email", "zebe@vip.qq.com");
// 传统的Map迭代方式
for (Map.Entry<String, Object> entry : infoMap.entrySet()) {
    System.out.println(entry.getKey() + "：" + entry.getValue());
}
// JDK8的迭代方式
infoMap.forEach((key, value) -> {
    System.out.println(key + "：" + value);
});

public static String createToken(Map<String, String> claims) throws Exception {
    try {
        Algorithm algorithm = Algorithm.HMAC256(SECRET);
        JWTCreator.Builder builder = JWT.create()
                .withIssuer(ISSUER)
                //设置过期时间为2小时
                .withExpiresAt(DateUtils.addHours(new Date(), 2));
        claims.forEach(builder::withClaim);
        return builder.sign(algorithm);
    } catch (IllegalArgumentException e) {
        throw new Exception("生成token失败");
    }
}

default void forEach(BiConsumer<? super K, ? super V> action) {
    Objects.requireNonNull(action);
    for (Map.Entry<K, V> entry : entrySet()) {
        K k;
        V v;
        try {
            k = entry.getKey();
            v = entry.getValue();
        } catch(IllegalStateException ise) {
            // this usually means the entry is no longer in the map.
            throw new ConcurrentModificationException(ise);
        }
        action.accept(k, v);
    }
}

@FunctionalInterface
public interface BiConsumer<T, U> {
    void accept(T t, U u);

    default BiConsumer<T, U> andThen(BiConsumer<? super T, ? super U> after) {
        Objects.requireNonNull(after);

        return (l, r) -> {
            accept(l, r);
            after.accept(l, r);
        };
    }
}

public Builder withClaim(String name, String value)