Java使用Google Zxing生成二维码的例子

<%@ page language="java"import="java.util.*"pageEncoding="UTF-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

  请输入关键字,多个关键字请用逗号隔开

  </p><p>  

  提交

/**

   * 生成一个二维码

   * @param resp

   * @param id

   */

  @Override

  publicvoidgenerateOneqrCode(HttpServletResponse resp, String id) {

    if(TextUtil.isNotEmpty(id)) {

      ServletOutputStream stream =null;

      try{

        intwidth =200;//图片的宽度

        intheight =200;//图片的高度

        stream = resp.getOutputStream();

        QRCodeWriter writer =newQRCodeWriter();

        BitMatrix m = writer.encode(id, BarcodeFormat.QR_CODE, height, width);

        //以流的方式输出到前台,action中return null就可以

        MatrixToImageWriter.writeToStream(m,"png", stream);

      }catch(IOException e) {

        e.printStackTrace();

      }catch(WriterException e1) {

        e1.printStackTrace();

      }finally{

        if(stream !=null) {

          try{

            stream.flush();

            stream.close();

          }catch(IOException e) {

            e.printStackTrace();

          }

        }

      }

    }

  }