@@ -0,0 +1,231 @@
+package com.cooltee.util;%0A%0Aimport java.util.UUID;%0A%0A/**%0A * Utilize class of String%0A * Created by Daniel on 2017/5/18.%0A */%0Apublic class StringUtil %7B%0A%0A%09public static String generateUUID() %7B%0A%09%09return UUID.randomUUID().toString();%0A%09%7D%0A%7D%0A

add String util class: generate UUID