Merge pull request #435 from Harshshah6/patch-1

Create PasswordUtil.java

Author: kishanrajput23

PasswordUtil.java

@@ -0,0 +1,63 @@
+import java.util.Random;
+
+public class PasswordUtil {
+				
+		public static boolean validate(String password) {
+//			return password.matches("((?=.*\\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%]).{8,20})");
+			return validate2(password);
+		}
+		
+		public static boolean hasSymbol(String password) {
+			return password.matches(".*[@#$%].*");
+		}
+		
+		public static boolean hasUppercase(String password) {
+			return password.matches(".*[A-Z].*");
+		}
+		
+		public static boolean hasLowerCase(String password) {
+			return password.matches(".*[a-z].*");
+		}
+		
+		public static boolean hasDigit(String password) {
+			return password.matches(".*\\d.*");
+		}
+		
+		public static boolean validate2(String pass) {
+				boolean flag = true;
+				
+				if (pass.length() < 8) {
+						//Password must have more than 8 chars
+						flag = false;
+				} else if (!hasDigit(pass)) {
+						//Password must contains digit
+						flag = false;
+				} else if (!hasSymbol(pass)) {
+						//Password must contains symbol
+						flag = false;
+				} else if (!hasUppercase(pass)) {
+						//Password must contains Upper case
+						flag = false;
+				} else if (!hasLowerCase(pass)) {
+						//Password must contains Lower case
+						flag = false;
+				}
+				
+				return flag;
+		}
+		
+		public static String generatePassword(int len) {
+				Random rnd = new Random();
+				String AB = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@#$%&";
+				StringBuilder sb = new StringBuilder(len);
+				for (int i = 0; i < len; i++) {
+					sb.append(AB.charAt(rnd.nextInt(AB.length())));
+				}
+				if(validate2(sb.toString())){
+				    return sb.toString();
+				}else{
+				   return generatePassword(12);
+				}
+		}
+		
+}