获取打印消息

business/model/print.go

@@ -4,6 +4,13 @@ const (
 	PrinterStatusOnlineWithoutPaper = 2  //在线正常缺纸
 	PrinterStatusOnline             = 1  //在线正常
 	PrinterStatusOffline            = -1 //离线
+
+	PrintMsgAlreadySend = 2  //已经发出打印消息
+	PrintMsgSuccess     = 1  //打印成功
+	PrintMsgWait        = 0  //待打印
+	PrintMsgFail        = -1 //打印失败（打印机报出）
+	PrintMsgErr         = -2 //京西报出
+	PrintMsgAll         = -9
 )
 
 type Printer struct {