微信生成二维码认证网页

「爱情、让人受尽委屈。」 2022-04-05 03:14 258阅读 0赞

一.引入相关jar

<dependency>
        <groupId>com.google.zxing</groupId>
        <artifactId>core</artifactId>
        <version>2.1</version>
    </dependency>
    <dependency>
        <groupId>com.google.zxing</groupId>
        <artifactId>javase</artifactId>
        <version>2.1</version>
    </dependency>

二.编写相关接口

/**
    	   * 生成二维码
    	   * @param request
    	   * @param content 二维码的内容
    	   * @return
    	  * @throws UnsupportedEncodingException 
    	   */
    	  @RequestMapping("/barCodeUrl")
    	  public void barCodeUrl(HttpServletRequest request,HttpServletResponse response) throws UnsupportedEncodingException{
    		 String preSupId = request.getParameter("preSupId");
    		 String userCode = request.getParameter("userCode"); 
    		 int width = 300;
    	     int height = 300;
    	     Hashtable<EncodeHintType, Object> hints= new Hashtable<EncodeHintType, Object>();
    	     hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
    	     BitMatrix bitMatrix;
    	    
    	     String wxUrl=smpGroupConfig.getWxUrl();//业务域名
    	     String url = URLEncoder.encode(wxUrl+"/smpGroup/supplier/focusOnWeixin.to?preSupId="+preSupId+"&userCode="+userCode,"utf-8");//访问URL
    	     String appid=smpGroupConfig.getCorpId();//服务号appid
    	     String content ="https://open.weixin.qq.com/connect/oauth2/authorize?appid="+appid+"&redirect_uri="+url+"&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect";  
    	     InputStream in = null;
    	     OutputStream os = null;
    	     try {
        	 	 bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
    	    	 BufferedImage barcodeImg = MatrixToImageWriter.toBufferedImage(bitMatrix);
    	         try {
    	        	  in = this.getImageStream(barcodeImg);
    	        	  byte[] data = new byte[2048];
    	        	  int count = -1;
    	        	  os = response.getOutputStream();
    	        	  while((count = in.read(data,0,2048)) != -1)
    	        		  os.write(data, 0, count);
    	        	  os.flush();
    	         } catch (Exception e) {
    	        	 e.printStackTrace();
    	         }
    	     } catch (Exception e) {
    	    	 e.printStackTrace();
    	     }finally {
    	    	 if(in!=null) try {in.close();} catch (Exception e) {}
    	    	 if(os!=null) try {os.close();} catch (Exception e) {}
    	     }
    	  }
    	  /**
    	   * 从BufferedImage对象中获取InputStream对象
    	   */
    	  public InputStream getImageStream(BufferedImage bi) {
    	   InputStream is = null;
    	   ByteArrayOutputStream bs = new ByteArrayOutputStream(); 
    	         ImageOutputStream imOut;  
    	         try {
    	             imOut = ImageIO.createImageOutputStream(bs);  
    	             ImageIO.write(bi, "png",imOut);
    	             is= new ByteArrayInputStream(bs.toByteArray());
    	         } catch (Exception e) {
    	             e.printStackTrace();  
    	         }   
    	         return is;
    	  }
    	  
    	  /**
    	   * 关注微信号
    	   * @param request
    	   * @return
    	   */
    	  @RequestMapping("focusOnWeixin")
    	  public ModelAndView focusOnWeixin(HttpServletRequest request,HttpServletResponse response) throws Exception{
    		  ModelAndView mav = new ModelAndView("/wechat/smpGroup/focusOnWeixin");
    		  String preSupId = request.getParameter("preSupId");
    		  String userCode = request.getParameter("userCode");
    		  String openId = super.getOpenidByHttp(request, response);
    		  System.out.println("---------->>preSupId:"+preSupId);
    		  System.out.println("---------->>openId:"+openId);
    		  if(StringUtils.isEmpty(openId)){
    			  System.out.println("获取用户信息失败！");
    			  mav = new  ModelAndView("/weixin/err");
    			  mav.addObject("err", "获取用户信息失败！");
    			  return mav;
    		  }
    		  String url = smpGroupConfig.getSmpGroupUrl() + "/wechat/Wechat!saveOpenIdToSupplier.action?openId="+openId+"&preSupId="+preSupId+"&userCode="+userCode;
    		  String result = super.getAppData(request, url);
    		  JSONObject json = JSONObject.fromString(result);
    		  mav.addObject("rtn", json.getString("rtn"));
    		  return mav;
    	  }

三.结果

1）扫码

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70][]

2）扫描结果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70 1][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70]: /images/20220405/8234ab1d9a624881b2bb4b0f528fdc8c.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70 1]: /images/20220405/7399b921186342449699255ce4347352.png