热敏式 打印机 小票排版

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(ListdetailsBeen) 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();

}