add IdUtil

examcloud-support/src/main/java/cn/com/qmth/examcloud/support/util/IdUtil.java

@@ -0,0 +1,11 @@
+package cn.com.qmth.examcloud.support.util;
+
+import java.util.UUID;
+
+public class IdUtil {
+
+    public static String uuid() {
+        return UUID.randomUUID().toString().replaceAll("-", "");
+    }
+
+}