为自定义的异常，添加一个构造方法，为日后所需做铺垫

@@ -23,6 +23,11 @@ public class CustomException extends RuntimeException {
         this.message = message;
     }
 
+    public CustomException(CustomExceptionType exceptionTypeEnum) {
+        this.code = exceptionTypeEnum.getCode();
+        this.message = exceptionTypeEnum.getMsg();
+    }
+
     public String getCode() {
         return code;
     }