ADD file via upload

CheckCode.java

@@ -0,0 +1,18 @@
+package com.util;
+/**
+ * 验证码生成类
+ */
+import java.util.Random;
+
+public class CheckCode {
+
+	public String getCheckCode(){
+		Random random = new Random();
+		String sRand="";
+		for (int i=0;i<4;i++){
+	    String rand=String.valueOf(random.nextInt(10));
+	    sRand+=rand;
+		}
+	    return sRand;
+	}
+}