热敏式打印机小票排版

逃离我推掉我的手 2022-06-08 23:29 277阅读 0赞

private int width = 32;//纸张宽度
        private int defaultRightSpacing = 16; //数量开始位置最后的宽度
        private int rightSpacing = defaultRightSpacing; //数量据左边的距离
        private int leftSpacing = width - defaultRightSpacing; //数量据右边的距离
        private int defaultLeftSpacing = width - defaultRightSpacing;
        private String getGoodDetails(List<OrderBean.DetailsBean> detailsBeen) throws UnsupportedEncodingException {
    
            StringBuffer sbf = new StringBuffer("");
            for (int i = 0; i < detailsBeen.size(); i++) {
                OrderBean.DetailsBean d = detailsBeen.get(i);
                String name = d.getProductName();
                if(name.length() > 8){
                    name = name.substring(0, 8);
                }
                String number = "x" + d.getNumber();
                String price = "￥" + d.getPayAmount();
                leftSpacing = defaultLeftSpacing - name.getBytes("gbk").length;
                rightSpacing = defaultRightSpacing - price.getBytes("gbk").length - number.getBytes("gbk").length;
                sbf.append(name);
                for (int j = 0; j < leftSpacing; j++) {
      //添加距左边的位置
                    sbf.append(" ");
                }
                sbf.append(number);
    //            oneLeftSpacing = sbf.toString().indexOf("x");
                for (int j = 0; j < rightSpacing; j++) {
      //添加距左边的位置
                    sbf.append(" ");
                }
                sbf.append(price);
                sbf.append("\n");
            }
            return sbf.toString();
        }