update 电单车

jsowell-common/src/main/java/com/jsowell/common/YouDianUtils.java

@@ -133,4 +133,18 @@ public class YouDianUtils {
         // 转换为字节数组
         return BytesUtil.intToBytesLittle(hexValue, 1);
     }
+
+    /**
+     * 端口号从0开始
+     * @param portNumber
+     * @return
+     */
+    public static String convertPortNumberToString(int portNumber) {
+        if (portNumber < 0 || portNumber > 15) {
+            throw new IllegalArgumentException("Port number must be between 0 and 15.");
+        }
+
+        // 转换为字节数组
+        return String.format("%02d", portNumber + 1);
+    }
 }