我怎样才能在Java中的打印机的品牌和型号？(How can i get a printer'

2019-07-21 21:07发布

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实际上，我工作的共享打印机服务器的Java应用程序，我需要这个应用来获得它共享打印机的品牌和型号。

我知道这个问题已经被问了三分四次，但没有人似乎已经找到了答案。

我试过这样的代码： 

PrintService[] printServices = PrintServiceLookup.lookupPrintServices(null, null);

        for (PrintService printer : printServices){           
            System.out.println(printer.getDefaultAttributeValue(PrinterMakeAndModel.class));
            System.out.println(printer.getAttribute(PrinterURI.class));
        }

第一印刷总是返回一个空字符串，第二个得到一个NullPointerException。

一些研究使我这个网页： http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4673400

看起来这是一个已知的“错误”，我真的不明白的评价。

我想一个解决办法是通过发送SNMP请求到打印机，以获得品牌和型号，但我不知道关于SNMP的事情，我不知道有一个SNMP命令来获取品牌和型号的任何打印机。

如果有人有关于如何实现这一点的想法，或者通过使用Java方法或通过发送可以在任何操作系统上进行SNMP命令或其他任何东西，你的帮助，将不胜感激。

编辑：

下面是到同一个问题已经被问了一个主题的链接：

  • 如何获得的javax.print打印机的型号？

编辑2：

解决方案：

正如我在评论说，我试图通过发送OID“1.3.6.1.2.1.25.3.2.1.3.1”到打印机获得通过SNMP的品牌和型号。 它似乎工作，但我不知道它的工作原理使用相同的OID任何打印机上，如果SNMP是目标打印机上禁用它可能会崩溃。

所以，我最终选择了用JNA和WINSPOOL.DRV获得驱动程序的名称。 它的一部分在JNA已经实现，但我不得不添加一些结构和功能。

这里的链接到现有WinspoolUtil.java和Winspool.java在JNA类。

下面是我个人的这两个类更新的代码。

WINSPOOL： 

import java.util.Arrays;
import java.util.List;

import com.sun.jna.Memory;
import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.platform.win32.WinDef.DWORD;
import com.sun.jna.platform.win32.WinDef.INT_PTR;
import com.sun.jna.platform.win32.WinNT.HANDLE;
import com.sun.jna.platform.win32.WinNT.HANDLEByReference;
import com.sun.jna.ptr.IntByReference;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public class WinspoolUpdate {
    public interface WinspoolLib extends StdCallLibrary {

        WinspoolLib INSTANCE = (WinspoolLib) Native.loadLibrary("Winspool.drv", WinspoolLib.class,
                W32APIOptions.UNICODE_OPTIONS);

        boolean EnumPrinters(int Flags, String Name, int Level, Pointer pPrinterEnum,
                int cbBuf, IntByReference pcbNeeded, IntByReference pcReturned);

        boolean GetPrinter(HANDLE hPrinter, int Level, Pointer pPrinter, int cbBuf, IntByReference pcbNeeded);

        boolean OpenPrinter(String pPrinterName, HANDLEByReference phPrinter, Pointer pDefault);

        public static class PRINTER_INFO_1 extends Structure {
            public int Flags;
            public String pDescription;
            public String pName;
            public String pComment;

            protected List<String> getFieldOrder() {
                return Arrays.asList(new String[] { "Flags", "pDescription", "pName", "pComment" });
            }

            public PRINTER_INFO_1() {
            }

            public PRINTER_INFO_1(int size) {
                super(new Memory(size));
            }
        }

        public static class PRINTER_INFO_2 extends Structure {
            public String pServerName;
            public String pPrinterName;
            public String pShareName;
            public String pPortName;
            public String pDriverName;
            public String pComment;
            public String pLocation;
            public INT_PTR pDevMode;
            public String pSepFile;
            public String pPrintProcessor;
            public String pDatatype;
            public String pParameters;
            public INT_PTR pSecurityDescriptor;
            public int Attributes;
            public int Priority;
            public int DefaultPriority;
            public int StartTime;
            public int UntilTime;
            public int Status;
            public int cJobs;
            public int AveragePPM;

            protected List<String> getFieldOrder() {
                return Arrays.asList(new String[] { "pServerName", "pPrinterName", "pShareName", "pPortName", 
                        "pDriverName", "pComment", "pLocation", "pDevMode", "pSepFile", "pPrintProcessor", 
                        "pDatatype", "pParameters", "pSecurityDescriptor", "Attributes", "Priority", "DefaultPriority",
                        "StartTime", "UntilTime", "Status", "cJobs", "AveragePPM" });
            }

            public PRINTER_INFO_2() {
            }

            public PRINTER_INFO_2(int size) {
                super(new Memory(size));
            }
        }

        public static class PRINTER_INFO_4 extends Structure {
            public String pPrinterName;
            public String pServerName;
            public DWORD Attributes;

            protected List<String> getFieldOrder() {
                return Arrays.asList(new String[] { "pPrinterName", "pServerName", "Attributes" });
            }

            public PRINTER_INFO_4() {
            }

            public PRINTER_INFO_4(int size) {
                super(new Memory(size));
            }
        }

        int PRINTER_ENUM_DEFAULT = 0x00000001;
        int PRINTER_ENUM_LOCAL = 0x00000002;
        int PRINTER_ENUM_CONNECTIONS = 0x00000004;
        int PRINTER_ENUM_FAVORITE = 0x00000004;
        int PRINTER_ENUM_NAME = 0x00000008;
        int PRINTER_ENUM_REMOTE = 0x00000010;
        int PRINTER_ENUM_SHARED = 0x00000020;
        int PRINTER_ENUM_NETWORK = 0x00000040;

        int PRINTER_ENUM_EXPAND = 0x00004000;
        int PRINTER_ENUM_CONTAINER = 0x00008000;

        int PRINTER_ENUM_ICONMASK = 0x00ff0000;
        int PRINTER_ENUM_ICON1 = 0x00010000;
        int PRINTER_ENUM_ICON2 = 0x00020000;
        int PRINTER_ENUM_ICON3 = 0x00040000;
        int PRINTER_ENUM_ICON4 = 0x00080000;
        int PRINTER_ENUM_ICON5 = 0x00100000;
        int PRINTER_ENUM_ICON6 = 0x00200000;
        int PRINTER_ENUM_ICON7 = 0x00400000;
        int PRINTER_ENUM_ICON8 = 0x00800000;
        int PRINTER_ENUM_HIDE = 0x01000000;
    }
}

WinspoolUtil： 

import Model.WinspoolUpdate.WinspoolLib;
import Model.WinspoolUpdate.WinspoolLib.PRINTER_INFO_2;

import com.sun.jna.platform.win32.Kernel32;
import com.sun.jna.platform.win32.Win32Exception;
import com.sun.jna.platform.win32.WinNT.HANDLEByReference;
import com.sun.jna.platform.win32.Winspool.PRINTER_INFO_1;
import com.sun.jna.platform.win32.Winspool.PRINTER_INFO_4;
import com.sun.jna.ptr.IntByReference;

public class WinspoolUtils2 {   
        public static PRINTER_INFO_1[] getPrinterInfo1() {
            IntByReference pcbNeeded = new IntByReference();
            IntByReference pcReturned = new IntByReference();
            WinspoolLib.INSTANCE.EnumPrinters(WinspoolLib.PRINTER_ENUM_LOCAL,
                    null, 1, null, 0, pcbNeeded, pcReturned);
            if (pcbNeeded.getValue() <= 0) {
                return new PRINTER_INFO_1[0];
            }

            PRINTER_INFO_1 pPrinterEnum = new PRINTER_INFO_1(pcbNeeded.getValue());
            if (!WinspoolLib.INSTANCE.EnumPrinters(WinspoolLib.PRINTER_ENUM_LOCAL,
                    null, 1, pPrinterEnum.getPointer(), pcbNeeded.getValue(), pcbNeeded, pcReturned)) {
                throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
            }

            pPrinterEnum.read();

            return (PRINTER_INFO_1[]) pPrinterEnum.toArray(pcReturned.getValue());
        }

        public static PRINTER_INFO_2[] getPrinterInfo2() {
            IntByReference pcbNeeded = new IntByReference();
            IntByReference pcReturned = new IntByReference();
            WinspoolLib.INSTANCE.EnumPrinters(WinspoolLib.PRINTER_ENUM_LOCAL,
                    null, 2, null, 0, pcbNeeded, pcReturned);
            if (pcbNeeded.getValue() <= 0) {
                return new PRINTER_INFO_2[0];
            }

            PRINTER_INFO_2 pPrinterEnum = new PRINTER_INFO_2(pcbNeeded.getValue());
            if (!WinspoolLib.INSTANCE.EnumPrinters(WinspoolLib.PRINTER_ENUM_LOCAL,
                    null, 2, pPrinterEnum.getPointer(), pcbNeeded.getValue(), pcbNeeded, pcReturned)) {
                throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
            }

            pPrinterEnum.read();

            return (PRINTER_INFO_2[]) pPrinterEnum.toArray(pcReturned.getValue());
        }


        public static PRINTER_INFO_4[] getPrinterInfo4() {
            IntByReference pcbNeeded = new IntByReference();
            IntByReference pcReturned = new IntByReference();
            WinspoolLib.INSTANCE.EnumPrinters(WinspoolLib.PRINTER_ENUM_LOCAL,
                    null, 4, null, 0, pcbNeeded, pcReturned);
            if (pcbNeeded.getValue() <= 0) {
                return new PRINTER_INFO_4[0];
            }

            PRINTER_INFO_4 pPrinterEnum = new PRINTER_INFO_4(pcbNeeded.getValue());
            if (!WinspoolLib.INSTANCE.EnumPrinters(WinspoolLib.PRINTER_ENUM_LOCAL,
                    null, 4, pPrinterEnum.getPointer(), pcbNeeded.getValue(), pcbNeeded, pcReturned)) {
                throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
            }

            pPrinterEnum.read();

            return (PRINTER_INFO_4[]) pPrinterEnum.toArray(pcReturned.getValue());
        }

        public static PRINTER_INFO_2 getPrinterInfo2(String printerName) {
            IntByReference pcbNeeded = new IntByReference();
            IntByReference pcReturned = new IntByReference();
            HANDLEByReference pHandle = new HANDLEByReference();

            WinspoolLib.INSTANCE.OpenPrinter(printerName, pHandle, null);

            WinspoolLib.INSTANCE.GetPrinter(pHandle.getValue(), 2, null, 0, pcbNeeded);
            if (pcbNeeded.getValue() <= 0) {
                return new PRINTER_INFO_2();
            }           

            PRINTER_INFO_2 pinfo2 = new PRINTER_INFO_2(pcbNeeded.getValue());

            WinspoolLib.INSTANCE.GetPrinter(pHandle.getValue(), 2, pinfo2.getPointer(), pcbNeeded.getValue(), pcReturned);          

            pinfo2.read();
            return (PRINTER_INFO_2) pinfo2;
        }

    }

一个主类调用这三个实现的功能，并显示结果： 

public static void main(String[] args) {

        for(PRINTER_INFO_1 printerInfo : WinspoolUtils2.getPrinterInfo1()) {

            System.out.println(printerInfo.pName + ": " + printerInfo.pDescription);             

        }

        for(PRINTER_INFO_2 printerInfo : WinspoolUtils2.getPrinterInfo2()) {

            System.out.println(printerInfo.pPrinterName + ": " + printerInfo.pDriverName);             

        }

        PRINTER_INFO_2 printerInfo = WinspoolUtils2.getPrinterInfo2("Canon iR-ADV C7000s GX300 V2.0");
        System.out.println(printerInfo.pPrinterName + ": " + printerInfo.pDriverName);        
    }

我有点挣扎，终于得到它的工作，所以我希望这将有助于。

如果您要添加的打印后台处理程序API的一些其他功能， 在这里你可以找到这个API的引用。

注：还有一个问题，因为我想这个应用程序是多平台，这个解决方案仅适用于Windows。 因此，在未来我会找到一个解决方案，以获得打印机驱动程序在Linux操作系统和Mac OS X上的名字，我会及时向大家发布，如果我找到的东西。

Answer 1:

（樱桃采摘是回答的问题的某些部分。）

看起来这是一个已知的“错误”，我真的不明白的评价。

事实上，它是一个征求增强（RFE）不是一个错误。

评估只是表明评论家认为他/她已经发现，如果当他们去接近它，他们可以实现在Windows操作系统上...的方式。 这是不是对你的解决方法。

有关获取使用SNMP打印机的型号此相关的问题举行会谈

  • 我如何通过在C＃中的SNMP获取打印机型号？

你应该能够将此映射到使用Java SNMP库的解决方案。 这种方法假定打印机是网络化是SNMP功能的...但我猜你已经想通了这一点。



Answer 2:

对于那些有兴趣谁在这个问题上，我一直在寻找能使用基本的Java库，而是一个解决方案，当我开始寻找这些库的源代码，我发现大部分的，都应该回到打印机的属性的方法从未实现，他们总是返回空值。 所以，在这一刻，有没有办法在Java中做到这一点。

有两个解决办法，我贴在我原来的问题的第二个编辑：

  • 获得通过SNMP调用这些信息。
  • 使用Windows打印后台处理程序的DLL和检索驱动这些信息。


Answer 3:

使用JNA，正确的版本以OP溶液（不重复的代码）是这样的：

WinspoolExt 

import java.util.Arrays;
import java.util.List;

import com.sun.jna.Memory;
import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.platform.win32.Winspool;
import com.sun.jna.platform.win32.WinDef.INT_PTR;
import com.sun.jna.platform.win32.WinNT.HANDLE;
import com.sun.jna.platform.win32.WinNT.HANDLEByReference;
import com.sun.jna.ptr.IntByReference;
import com.sun.jna.win32.W32APIOptions;

public interface WinspoolExt extends Winspool {

    WinspoolExt INSTANCE = (WinspoolExt) Native.loadLibrary("Winspool.drv", WinspoolExt.class,
            W32APIOptions.UNICODE_OPTIONS);

    boolean GetPrinter(HANDLE hPrinter, int Level, Pointer pPrinter, int cbBuf, IntByReference pcbNeeded);

    boolean OpenPrinter(String pPrinterName, HANDLEByReference phPrinter, Pointer pDefault);

    public static class PRINTER_INFO_2 extends Structure {
        public String pServerName;
        public String pPrinterName;
        public String pShareName;
        public String pPortName;
        public String pDriverName;
        public String pComment;
        public String pLocation;
        public INT_PTR pDevMode;
        public String pSepFile;
        public String pPrintProcessor;
        public String pDatatype;
        public String pParameters;
        public INT_PTR pSecurityDescriptor;
        public int Attributes;
        public int Priority;
        public int DefaultPriority;
        public int StartTime;
        public int UntilTime;
        public int Status;
        public int cJobs;
        public int AveragePPM;

        protected List<String> getFieldOrder() {
            return Arrays.asList(new String[] { "pServerName", "pPrinterName", "pShareName", "pPortName",
                    "pDriverName", "pComment", "pLocation", "pDevMode", "pSepFile", "pPrintProcessor", "pDatatype",
                    "pParameters", "pSecurityDescriptor", "Attributes", "Priority", "DefaultPriority", "StartTime",
                    "UntilTime", "Status", "cJobs", "AveragePPM" });
        }

        public PRINTER_INFO_2() {
        }

        public PRINTER_INFO_2(int size) {
            super(new Memory(size));
        }
    }
}

WinspoolUtilExt 

import com.sun.jna.Pointer;
import com.sun.jna.platform.win32.Kernel32;
import com.sun.jna.platform.win32.Win32Exception;
import com.sun.jna.platform.win32.WinNT.HANDLEByReference;
import com.sun.jna.platform.win32.WinspoolUtil;
import com.sun.jna.ptr.IntByReference;

import WinspoolExt.PRINTER_INFO_2;

public class WinspoolUtilExt extends WinspoolUtil {

    public static PRINTER_INFO_2[] getPrinterInfo2() {
        IntByReference pcbNeeded = new IntByReference();
        IntByReference pcReturned = new IntByReference();
        WinspoolExt.INSTANCE.EnumPrinters(WinspoolExt.PRINTER_ENUM_LOCAL, null, 2, null, 0, pcbNeeded, pcReturned);
        if (pcbNeeded.getValue() <= 0) {
            return new PRINTER_INFO_2[0];
        }

        PRINTER_INFO_2 pPrinterEnum = new PRINTER_INFO_2(pcbNeeded.getValue());
        if (!WinspoolExt.INSTANCE.EnumPrinters(WinspoolExt.PRINTER_ENUM_LOCAL, null, 2, pPrinterEnum.getPointer(),
                pcbNeeded.getValue(), pcbNeeded, pcReturned)) {
            throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
        }

        pPrinterEnum.read();

        return (PRINTER_INFO_2[]) pPrinterEnum.toArray(pcReturned.getValue());
    }

    public static PRINTER_INFO_2 getPrinterInfo2(String printerName) {
        IntByReference pcbNeeded = new IntByReference();
        IntByReference pcReturned = new IntByReference();
        HANDLEByReference pHandle = new HANDLEByReference();

        WinspoolExt.INSTANCE.OpenPrinter(printerName, pHandle, (Pointer) null);

        WinspoolExt.INSTANCE.GetPrinter(pHandle.getValue(), 2, null, 0, pcbNeeded);
        if (pcbNeeded.getValue() <= 0) {
            return new PRINTER_INFO_2();
        }

        PRINTER_INFO_2 pinfo2 = new PRINTER_INFO_2(pcbNeeded.getValue());

        WinspoolExt.INSTANCE.GetPrinter(pHandle.getValue(), 2, pinfo2.getPointer(), pcbNeeded.getValue(), pcReturned);

        pinfo2.read();
        return (PRINTER_INFO_2) pinfo2;
    }
}

基本上，它增加了PRINTER_INFO_2支持。



文章来源: How can i get a printer's make and model in Java?
标签： java printing driver snmp jna
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