Question

使用此java api：http://docs.oracle.com/javase/6/docs/api/javax/print/package-summary.html

我尝试根据自己的需要修改此代码，目前我已经：

import java.io.FileInputStream;
import javax.print.Doc;
import javax.print.DocFlavor;
import javax.print.DocPrintJob;
import javax.print.PrintException;
import javax.print.PrintService;
import javax.print.PrintServiceLookup;
import javax.print.SimpleDoc;
import java.io.*;
import javax.print.*;
import javax.print.attribute.*;
import javax.print.attribute.standard.*;

 public class pdfPrinter {

    public static String CompletefileName; // calls from FileUploadController

    public static void main(String args[]) {

        FileInputStream psStream = null;
        try {
            psStream = new FileInputStream(CompletefileName); // this calls a location where the pdf file is stored
        } catch (FileNotFoundException ffne) {
            ffne.printStackTrace();
        }
        if (psStream == null) {
            return;
        }
        DocFlavor psInFormat = DocFlavor.INPUT_STREAM.AUTOSENSE;
        Doc myDoc = new SimpleDoc(psStream, psInFormat, null); // unsure what psStream is, not explained in the api, want to use this to print pdfs, will look at more 
        PrintRequestAttributeSet aset = new HashPrintRequestAttributeSet();
        PrintService[] services = PrintServiceLookup.lookupPrintServices(psInFormat, aset);
        aset.add(new Copies(5)); //sets copies, will add this as a vairable so users can change this
        aset.add(Sides.DUPLEX); // same as above
        if (myPrinter != null) { // having issues setting myPrinter
            DocPrintJob job = myPrinter.createPrintJob();
            try {
                job.print(myDoc, aset);

            } catch (Exception pe) {
                pe.printStackTrace();
            }
        } else {
            System.out.println("no printer services found"); //error msg
        }
    }
}

目前这不能编译，因为我不知道如何将myPrinter设置为我的机器上的默认打印机，这也适用于jsf网络应用程序，我可以通过按下按钮来运行网页？

这是打印pdf的正确方法吗？任何建议或教程都会非常有用

Answer 1

我查看了DocPrintJob的javadoc，它是一个接口。所以myprinter必须是实现该接口的对象。

从那里看起来你可以附上一台打印机：http://docs.oracle.com/javase/6/docs/api/javax/print/DocPrintJob.html

这可能会有所帮助，但它给出了一个例子： http://docs.oracle.com/javase/6/docs/technotes/guides/jps/spec/jpsOverview.fm4.html

Answer 2

您应该定义为

PrintService[] services = PrintServiceLookup.lookupPrintServices(flavor, null);
PrintService myService = null;
for(PrintService service : services) {
    System.out.println(service.getName());
    if(service.getName().contains(user.getDefaultPrinter())) {
        myService = service;
        break;
    }
}

使用Java api进行Java打印问题

2 个答案: