要使用Java调用热敏打印机,你需要遵循以下步骤:
确保你的打印机已连接到计算机并正确安装。通常,热敏打印机会通过USB或者并口连接到计算机。
在Java中,你可以使用javax.print
包来操作打印机。首先,导入所需的类:
import javax.print.*;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import javax.print.attribute.standard.Copies;
import javax.print.attribute.standard.MediaSizeName;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
public static PrintService[] getAvailablePrinters() {
return PrintServiceLookup.lookupPrintServices(null, null);
}
public static PrintService selectPrinter(String printerName) {
PrintService[] printers = getAvailablePrinters();
for (PrintService printer : printers) {
if (printer.getName().equalsIgnoreCase(printerName)) {
return printer;
}
}
return null;
}
public static PrintRequestAttributeSet setPrintRequestAttributes() {
PrintRequestAttributeSet attributes = new HashPrintRequestAttributeSet();
attributes.add(new Copies(1));
attributes.add(MediaSizeName.ISO_A4);
return attributes;
}
public static void printText(String printerName, String textToPrint) throws PrintException {
PrintService printer = selectPrinter(printerName);
if (printer == null) {
System.out.println("Printer not found.");
return;
}
InputStream inputStream = new ByteArrayInputStream(textToPrint.getBytes());
DocFlavor flavor = DocFlavor.INPUT_STREAM.AUTOSENSE;
Doc doc = new SimpleDoc(inputStream, flavor, null);
PrintRequestAttributeSet attributes = setPrintRequestAttributes();
DocPrintJob job = printer.createPrintJob();
job.print(doc, attributes);
}
printText
方法:public static void main(String[] args) {
try {
String printerName = "Your Printer Name"; // 将此处替换为你的打印机名称
String textToPrint = "Hello, World!";
printText(printerName, textToPrint);
} catch (PrintException e) {
e.printStackTrace();
}
}
现在,当你运行这个程序时,它将在指定的打印机上打印文本。请注意,这个示例仅适用于文本打印,如果你需要打印图像或其他格式,你需要修改DocFlavor
和数据源。