java能实现打印功能 可以支持打印机？

Question

实现这个接口Printable就可以了   
下边是其中一点点代码.
   // 印刷設定データを取得する
            PrintRequestAttributeSet aset = new HashPrintRequestAttributeSet();
            if (pageSettingData.getPaperDirection().equals("LANDSCAPE")) {
                aset.add(OrientationRequested.LANDSCAPE);
//                paper.setImageableArea(0,0,pageHeight,pageWidth);
            } else if (pageSettingData.getPaperDirection().equals("PORTRAIT")) {
                aset.add(OrientationRequested.PORTRAIT);
//                paper.setImageableArea(0,0,pageWidth,pageHeight);
            }            aset.add(new Copies(1));
            aset.add(new JobName("エリアの印刷", null));

Answer 1

of course!
我们打印用的是用友的CELL组件，代码是用java实现的。

Answer 2

还需要计算纸张大小,
        if (pageSettingData.getPaperDirection().equals("LANDSCAPE")) {
            if (paperSize.equals("A3")) {
                pageWidth = 420 / 25.4 * 72;
                pageHeight = 297 / 25.4 * 72;
            } else if (paperSize.equals("A4")) {
                pageWidth = 297 / 25.4 * 72;
                pageHeight = 210 / 25.4 * 72;
            } else if (paperSize.equals("A5")) {
                pageWidth = 210 / 25.4 * 72;
                pageHeight = 148 / 25.4 * 72;
            } else if (paperSize.equals("B2")) {
                pageWidth = 707 / 25.4 * 72;
                pageHeight = 500 / 25.4 * 72;
            } else if (paperSize.equals("B3")) {
                pageWidth = 500 / 25.4 * 72;
                pageHeight = 353 / 25.4 * 72;
            } else if (paperSize.equals("B4")) {
                pageWidth = 353 / 25.4 * 72;
                pageHeight = 250 / 25.4 * 72;
            }
        } else if (pageSettingData.getPaperDirection().equals("PORTRAIT")) {
            if (paperSize.equals("A3")) {
                pageHeight = 420 / 25.4 * 72;
                pageWidth = 297 / 25.4 * 72;
            } else if (paperSize.equals("A4")) {
                pageHeight = 297 / 25.4 * 72;
                pageWidth = 210 / 25.4 * 72;
            } else if (paperSize.equals("A5")) {
                pageHeight = 210 / 25.4 * 72;
                pageWidth = 148 / 25.4 * 72;
            } else if (paperSize.equals("B2")) {
                pageHeight = 707 / 25.4 * 72;
                pageWidth = 500 / 25.4 * 72;
            } else if (paperSize.equals("B3")) {
                pageHeight = 500 / 25.4 * 72;
                pageWidth = 353 / 25.4 * 72;
            } else if (paperSize.equals("B4")) {
                pageHeight = 353 / 25.4 * 72;
                pageWidth = 250 / 25.4 * 72;
            }
        }