这两天为了实现云打印功能找了很多相关的文章
记录一下这一篇，python云打印实现-朝花夕拾，代码通过监听文件夹有无产生新文件来判断是否执行，我尝试运行了下没问题，于是打算转载一下
程序运行结果
由于对方的代码和我实现的有点出入但都是先下载，后打印，只不过我的实通过mqtt服务器罢了，于是通过一步一步解析，我发现他这里有几个需要注意的，给大家和自己才个坑
1、settings.json 配置打印机和监控文件夹
2、不支持图片和pdf打印，有点难弄，后面处理了我会附上
3、不支持彩彩印规格这些
4、打印机用默认的即可，配置没多大作用，因为最后参数没有传过去
我改良后的
import time import win32api import win32print from watchdog.observers import Observer from watchdog.events import * import json import sys import traceback import os def printer_loading(filename, printer): win32api.ShellExecute( 0, "print", filename, '/d:"%s"' % win32print.GetDefaultPrinter(), ".", 0 ) ''' def printer_pic(pic_path, printer_name): # 物理宽度、高度 PHYSICALWIDTH = 110 PHYSICALHEIGHT = 111 # 物理偏移位置 PHYSICALOFFSETX = 112 PHYSICALOFFSETY = 113 printer_name = win32print.GetDefaultPrinter() hDC = win32ui.CreateDC() hDC.CreatePrinterDC(printer_name) printer_size = hDC.GetDeviceCaps(PHYSICALWIDTH), hDC.GetDeviceCaps(PHYSICALHEIGHT) # printer_margins = hDC.GetDeviceCaps (PHYSICALOFFSETX), hDC.GetDeviceCaps (PHYSICALOFFSETY) # 打开图片 # ＃通过每个像素使它尽可能大 # ＃页面不失真。 bmp = Image.open(file_name) ratios = [1.0 * 1754 / bmp.size[0], 1.0 * 1240 / bmp.size[1]] scale = min(ratios) # ＃开始打印作业，并将位图绘制到 # ＃按比例缩放打印机设备。 hDC.StartDoc(file_name) hDC.StartPage() dib = ImageWin.Dib(bmp) scaled_width, scaled_height = [int(scale * i) for i in bmp.size] print(scaled_width, scaled_height) x1 = int((printer_size[0] - scaled_width) / 2) y1 = int((printer_size[1] - scaled_height) / 2) # 横向位置坐标 x1 = 1580 # 竖向位置坐标 y1 = 30 # 4倍为自适应图片实际尺寸打印 x2 = x1 + bmp.size[0] * 4 y2 = y1 + bmp.size[1] * 4 dib.draw(hDC.GetHandleOutput(), (x1, y1, x2, y2)) hDC.EndPage() hDC.EndDoc() hDC.DeleteDC() ''' class FileEventHandler(FileSystemEventHandler): def __init__(self,printer): FileSystemEventHandler.__init__(self) self.printer = printer def on_created(self, event): print(event.is_directory) if event.is_directory: print("directory created:{0}".format(event.src_path)) else: print("file created:{0}".format(event.src_path)) if event.src_path.endswith("docx") or event.src_path.endswith("doc") or event.src_path.endswith("xlsx") or event.src_path.endswith("jpg") or event.src_path.endswith("pdf") or event.src_path.endswith("xls") or event.src_path.endswith("txt") or event.src_path.endswith("img"): if "~" not in event.src_path: print(f"打印路径{event.src_path}") print(f"打印机名字{self.printer}") printer_loading(event.src_path, self.printer) # import time # win32api.ShellExecute(0, 'open', 'C:\\Program Files (x86)\\Allway Sync\\Bin\\syncappw.exe', '','',1) if __name__ == "__main__": try: observers = [] print("当前检测到的打印机:") maxL = 2 Num = 2 for i in range(1, 10): # print(i) r = win32print.EnumPrinters(i) l = len(r) if l > maxL: maxL = l Num = i for i, p in enumerate(list(win32print.EnumPrinters(Num))): print(f"\t{i}:{p[1]}\n") # f = open('.ttings.txt', 'r', encoding="utf-8") settings = {} # print("当前配置:") # for line in f.readlines(): # k, v = line.split(",") # settings[k.strip()] = v.strip() # print(f"\t{k}:{v}") print("当前配置:") with open("./settings.json", 'rb') as load_f: ds = json.load(load_f) for d in ds: settings[d['url'].strip()] = d["printer"].strip() print(f"\t{d}") pass for path, printer in settings.items(): observer = Observer() print("打印机名"+printer) event_handler = FileEventHandler(printer) observer.schedule(event_handler, path, True) observer.start() observers.append(observer) try: while True: time.sleep(1) except KeyboardInterrupt: for observer in observers: observer.stop() for observer in observers: observer.join() except Exception as e: print(e) traceback.print_exc() input()
完整代码在这里：xxxxx
我顺藤摸瓜发现我们启动的方法不一样，我的是通过
w = DispatchEx('kwps.Application') w.Visible = 0 # 不打开软件 w.DisplayAlerts = 0 # 不报错 doc = w.Documents.Open(f)
而他的核心代码是通过
# 打印输出 def printer_loading(filename, printer): win32api.ShellExecute( 0, "print", filename, '/d:"%s"' % win32print.GetDefaultPrinter(), ".", 0 ) # 打印
暂时只知道第一个代码需要安装wps，第二个未测试
client_mqtt版（需要配合mqtt数据使用，不建议下载，自己用，需要安装wps-珠海zf版本）
client_mqtt_plus（需要配合mqtt数据使用，不建议下载，自己用，需要安装wps-珠海zf版本）
朝花夕拾-改良版（可以下载）
