准备

需要用到的hutool依赖包

代码

业务目标:获取可以扫一扫则打开对应教育局的域名网址的二维码
该业务逻辑是: 1.获取当前用户注册时的域名标识orgCode,2.通过orgCode找到对应教育局的域名,3.判断该域名最前面是否有加http:// 若没有则使用URLUtil.normalize(域名)用加上去,4.将域名和项目logo代码生成一个二维码

public R<String> getQrcode(HttpServletResponse response) {
//获取当前用户的域名标识String orgCode = UserHolder.getOrgCode();if (StringUtils.isEmpty(orgCode)){return R.failed("获取二维码失败");}BaseEducationNameReq req = new BaseEducationNameReq();req.setOrgCode(orgCode);//通过域名标识获取域名地址R<String> domainNameByOrgCode = educationClient.getEduDomainNameByOrgCode(req);String domainName = "";if (StringUtils.isNotBlank(domainNameByOrgCode.getEntity())){domainName = domainNameByOrgCode.getEntity();}
//校验域名是否前面有加'http://',若无则加上去domainName = URLUtil.normalize(domainName);try {//生成对应二维码,并且指定二维码中间的logo地址BufferedImage image = QrCodeUtil.generate(domainName, QrConfig.create().setImg("static/logo.png"));ServletOutputStream os = response.getOutputStream();ImageIO.write(image, "jpg", os);return R.ok();} catch (Exception e) {e.printStackTrace();}return R.failed("获取二维码失败");}

代码demo

 try {BufferedImage image = QrCodeUtil.generate("域名地址", QrConfig.create().setImg("二维码logo地址"));ServletOutputStream os = response.getOutputStream();ImageIO.write(image, "jpg", os);return R.ok();} catch (Exception e) {e.printStackTrace();}