1 files changed, 21 insertions, 0 deletions
diff --git a/src/main/java/com/cmcc/simulator/util/StringUtil.java b/src/main/java/com/cmcc/simulator/util/StringUtil.java
new file mode 100644
index 0000000..002e7f0
--- /dev/null
+++ b/src/main/java/com/cmcc/simulator/util/StringUtil.java
@@ -0,0 +1,21 @@
+package com.cmcc.simulator.util;
+
+public class StringUtil {
+
+	public static String randomStr(int len) {
+		if (len == 0) {
+			return "";
+		}
+		int a = (int) (Math.random() * 3);
+		if (a == 0) {
+			return ((int) (Math.random() * 10)) + randomStr(len - 1);
+		} else {
+			return ((char) ((int) (Math.random() * 26) + 65)) + randomStr(len - 1);
+		}
+	}
+	
+//	public static void main(String[] args) {
+//		System.out.println(randomStr(2));
+//	}
+
+}