添加maven依赖

    		
     
      com.google.zxing
     		
     
      core
     		
     
      3.0.0
     	
    	
    		
     
      com.google.zxing
     		
     
      javase
     		
     
      3.0.0
     	
    

代码实现

@GetMapping("/test")  public void test(HttpServletResponse response){    int BLACK = 0xFF000000;    int WHITE = 0xFFFFFFFF;    String text = "https://www.baidu.com/"; //这里是URL ，扫描之后就跳转到这个界面    int width = 900;    int height = 900;    // 二维码图片格式    String format = "gif";    // 设置编码，防止中文乱码    Hashtable
    
      ht = new Hashtable<>();    ht.put (EncodeHintType.CHARACTER_SET, "UTF-8");    // 设置二维码参数(编码内容，编码类型，图片宽度，图片高度,格式)    try {        BitMatrix bitMatrix = new MultiFormatWriter().encode (text, BarcodeFormat.QR_CODE, width, height, ht);        // 生成二维码(定义二维码输出服务器路径)        int b_width = bitMatrix.getWidth ();        int b_height = bitMatrix.getHeight ();        // 建立图像缓冲器        BufferedImage image = new BufferedImage (b_width, b_height, BufferedImage.TYPE_3BYTE_BGR);        for ( int x = 0; x < b_width; x++ )        {            for ( int y = 0; y < b_height; y++ )            {                image.setRGB (x, y, bitMatrix.get (x, y) ? BLACK : WHITE);            }        }        ImageIO.write(image,format,response.getOutputStream());    }catch (Exception e){           System.out.println(e.getMessage());    }}
    

写完后get请求，界面就可以看到二维码，然后用微信扫一扫即可看到跳转