public static String concat(String... strings) {
        if (strings == null) {
            return null;
        }
        StringBuilder sb = new StringBuilder();
        for (String str : strings) {
            if (str != null) {
                sb.append(str);
            }
        }
        return sb.toString();
    }
@author Robert HG (254963746@qq.com) on 7/24/14.
lts-core/src/main/java/com/github/ltsopensource/core/commons/utils/StringUtils.java