java - 如何获取默认打印机属性设置

Question

我想知道如何使用 PrintServiceAttributeSet 获取默认打印机属性设置。例如，在从打印机打印之前，我需要知道当前的打印机属性设置，例如色度。根据该返回值，我需要将打印机设置为新的属性设置。谁能帮我吗。是否可以获取一些示例代码来获取和设置此属性。

Answer 1

引用How do I get print service attribute set? :

This example demonstrates how to get print service’s attribute set using the javax.print API. First we find the default printer for the current machine using the PrintServiceLookup class. This will give us a PrintService object, this object might be null if no print service found.

The final step is to get the print service attribute set by calling getAttributes() method of the PrintService. We can convert the returned AttributeSet into an array using the toArray() method and iterate it.

package org.kodejava.example.print;

import javax.print.PrintService;
import javax.print.PrintServiceLookup;
import javax.print.attribute.Attribute;
import javax.print.attribute.AttributeSet;

public class PrinterAttribute {
    public static void main(String[] args) {
        //
        // Locates the default print service for this environment.
        //
        PrintService printer =
                PrintServiceLookup.lookupDefaultPrintService();

        if (printer != null) {
            //
            // Getting print service's attribute set.
            //
            AttributeSet attributes = printer.getAttributes();
            for (Attribute a : attributes.toArray()) {
                String name = a.getName();
                String value = attributes.get(a.getClass()).toString();
                System.out.println(name + " : " + value);
            }
        }
    }
}