java中的打印机问题

Question

我有一个问题，我想发送以在打印机上打印文件，为此我获得了我联网的打印机的 IP 地址并选择了第一个，这是代码：

PrintService[] service = PrinterJob.lookupPrintServices();// list of ip address 

PrinterJob printJob = PrinterJob.getPrinterJob();

printJob.setPrintService(service[0]);//I get the first address 

但是现在我想分配包含我想要的打印机的IP地址的字符串：\\10.100.20.26\My printer，而不是我拥有的网络，并且那里不知道如何，请有人帮助我，我已经搜索了解决方案，但我没有得到很好的结果。

Answer 1

 public void printFile(File file, String printerIp) throws PrintException, IOException {

        Socket socket = new Socket(printerIp, 9100);

        FileInputStream fileInputStream = new FileInputStream(file);
        byte [] mybytearray  = new byte [(int)file.length()];

        fileInputStream.read(mybytearray,0,mybytearray.length);

        OutputStream outputStream = socket.getOutputStream();

        outputStream.write(mybytearray,0,mybytearray.length);

             //Curious thing is that we have to wait some time to make more prints.
        try {
            Thread.sleep(500);
        } catch (InterruptedException e) {

        }

        outputStream.flush();
        outputStream.close();
        socket.close();
        fileInputStream.close();
    }

    //void main
      File f = new File("C:\\Users\\SHINWAR\\Desktop\\link.txt");
    try {
        printFile(f, "192.168.1.100"); //f : file to print , ip printer
    } catch (Exception e) {
        System.out.println(e + "--file");
    }

从ip打印并发送文件.txt

Answer 2

我猜PrintService 有一些属性可以给你它的路径。因此，请遍历 PrintServices 的数组，找到与您拥有的路径匹配的一个并使用它：

PrintService[] services = PrinterJob.lookupPrintServices();// list of ip address
String myPrinter = "10.100.20.26\My printer";
PrintService serviceToUse = null;

for (PrintService service: services) {
    if (service.getPath().equals(myPrinter)) {
        serviceToUse = service;
        break;
    }
}

if (serviceToUse != null) {
    PrinterJob printJob = PrinterJob.getPrinterJob();

    printJob.setPrintService(serviceToUse);
}