初始化项目：添加后端代码、ThinkPHP框架、前端资源

application/common/exception/UploadException.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace app\common\exception;
+
+use think\Exception;
+use Throwable;
+
+class UploadException extends Exception
+{
+    public function __construct($message = "", $code = 0, $data = [])
+    {
+        $this->message = $message;
+        $this->code = $code;
+        $this->data = $data;
+    }
+
+}