服务端将打印内容发送给客户端，APP进行打印（支持网络打印机和蓝牙打印机）

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public class PrintTools {

    private static final String TAG = PrintTools.class.getSimpleName();

    /**
     * 根据后台拼接好的内容打印出来
     */
    public static void printByBTPrinter(String jsContent) {

        printByPrinter(jsContent, "");
    }


    public static void printByNetPrinter(String jsContent, String ip) {
        printByPrinter(jsContent, ip);
    }

    private static void printByPrinter(String jsContent, String ip) {
        boolean bluePrint = TextUtils.isEmpty(ip);
        EscCommand esc = new EscCommand();
        if (esc != null) {
            esc.addPrintAndFeedLines((byte) 8);
            esc.addCutPaper();
            List<PrintLineData> content = GsonUtils.gsonToList(jsContent, PrintLineData.class);
            if (TextUtils.isEmpty(jsContent)) {
                return;
            }
            for (PrintLineData line : content) {
                if (checkNonNull(line.getColumns())) {
                    if (line.getColumns().size() > 1) {//多列
                        for (PrintLineData.ColumnsBean column : line.getColumns()) {
                            //加粗
                            boolean isBold = column.getBold() == 1;
                            esc.addSelectPrintModes(EscCommand.FONT.FONTA, isBold ? EscCommand.ENABLE.ON : EscCommand.ENABLE.OFF, EscCommand.ENABLE.OFF, EscCommand.ENABLE.OFF, EscCommand.ENABLE.OFF);
                            //设置字体大小
                            setFontSize(esc, column.getFontSize());
                            esc.addSelectJustification(column.getTextAlignment());
                            esc.addText(column.getContent());
                        }
                        esc.addText("\n");
                    } else {
                        PrintLineData.ColumnsBean column = line.getColumns().get(0);
                        if ("barcode".equals(column.getContentType())) {//如果是条形码

                            if (!TextUtils.isEmpty(column.getContent())) {
                                //esc.addSelectJustification(EscCommand.JUSTIFICATION.CENTER);
                                esc.addSelectJustification(column.getTextAlignment());
                                // esc.addSelectPrintingPositionForHRICharacters(EscCommand.HRI_POSITION.BELOW);//设置条码可识别字符位置在条码下方
                                esc.addSetBarcodeHeight((byte) 120); //设置条码高度为120点
                                esc.addSetBarcodeWidth((byte) 2); // 设置条码单元宽度为1
                                esc.addCODE128(esc.genCode128(column.getContent().trim()));
                                esc.addPrintAndLineFeed();
                            }

                        } else {
                            //加粗
                            boolean isBold = column.getBold() == 1;
                            esc.addSelectPrintModes(EscCommand.FONT.FONTA, isBold ? EscCommand.ENABLE.ON : EscCommand.ENABLE.OFF, EscCommand.ENABLE.OFF, EscCommand.ENABLE.OFF, EscCommand.ENABLE.OFF);
                            setFontSize(esc, column.getFontSize());
                            esc.addSelectJustification(column.getTextAlignment());
                            esc.addText(column.getContent() + "\n");
                        }
                    }
                }
            }
            esc.addPrintAndFeedLines((byte) 1);
            esc.addCutPaper();

            Vector<Byte> datas = esc.getCommand();
            if (bluePrint) {
                // 发送数据
                if (PrinterManager.getInstance().getBleManager() != null) {
                    PrinterManager.getInstance().getBleManager().handlePrint(datas, "打印时间");
                }
            } else {
                if (PrinterManager.getInstance().getNetManager(ip) != null) {
                    ThreadPool.getInstantiation().addTask(() -> {
                        PrinterManager.getInstance().getNetManager(ip).handlePrint(datas, "打印时间");
                    });
                } else {
                    PrinterManager.getInstance().connectNet(ip, "网络打印机", datas, "打印时间");
                }
            }
        }
    }


    /**
     * 动态设置字体大小
     *
     * @param esc      Escommond
     * @param fontSize 字体大小（large，middle，以及正常字体）
     */
    private static void setFontSize(EscCommand esc, String fontSize) {
        switch (fontSize) {
            case "large":
                esc.addSelectPrintModes(EscCommand.FONT.FONTA, EscCommand.ENABLE.OFF, EscCommand.ENABLE.ON, EscCommand.ENABLE.ON, EscCommand.ENABLE.OFF);
                break;
            case "middle":
                esc.addSelectPrintModes(EscCommand.FONT.FONTA, EscCommand.ENABLE.OFF, EscCommand.ENABLE.ON, EscCommand.ENABLE.OFF, EscCommand.ENABLE.OFF);
                break;
            default:
                esc.addSelectPrintModes(EscCommand.FONT.FONTA, EscCommand.ENABLE.OFF, EscCommand.ENABLE.OFF, EscCommand.ENABLE.OFF, EscCommand.ENABLE.OFF);
                break;
        }
    }


}