public static void setCode() throws Exception {
String filePath = "/home/static/images/";
String fileName = "dcn.png";
JSONObject json = new JSONObject();
json.put("dcn", "http://kf.d.cn");
// String content = json.toJSONString();
String content = "http://kf.d.cn";
int width = 200;
int height = 200;
String format = "png";
Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
BitMatrix bitMatrix =
new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
Path path = FileSystems.getDefault().getPath(filePath, fileName);
MatrixToImageWriter.writeToPath(bitMatrix, format, path);
}
