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java微信小程序參數二維碼生成帶背景圖加字體(無限生成)

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需求 : 

1,因為項目需求 ,生成數以萬計的二維碼   

   2 ,每個二維碼帶不同的參數

   3,二維碼有固定背景圖

4 , 往生成圖片上寫入 字體和編號(動態 )

設計技術 :

 1,微信接口token ,nginx 緩存

  2,二維碼 圖片定義 寫字

maven

<dependency>
<groupId>com.twelvemonkeys.imageio</groupId>
<artifactId>imageio-jpeg</artifactId>
<version>3.0-rc5</version>
</dependency>

還有rt.jar 在你java安裝文件的bin裏面

獲取token信息

public void GetUrl() throws ClientProtocolException,
	IOException {
		HttpGet httpGet = new HttpGet(
				"https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="
						+ Configure.getAppID() + "&secret="
						+ Configure.getSecret() );
		HttpClient httpClient = HttpClients.createDefault();
		HttpResponse res = httpClient.execute(httpGet);
		HttpEntity entity = res.getEntity();
		String result = EntityUtils.toString(entity, "UTF-8");
		JSONObject jsons = JSONObject.fromObject(result);
		String expires_in = jsons.getString("expires_in");
		
		//緩存
		if(Integer.parseInt(expires_in)==7200){
			//ok
			String access_token = jsons.getString("access_token");
			Jedis cache = new Jedis("127.0.0.1", 6379);
			System.out.println("access_token:"+access_token);
			Pipeline pipeline = cache.pipelined();
			pipeline.set("access_token", access_token);
			pipeline.expire("access_token", 7200);
			pipeline.sync();
		}else{
			System.out.println("出錯獲取token失敗!");
		}
		
	}

  獲取二維碼 信息圖片

    public String GetPostUrl(String access_token,String id) throws Exception {
          //String result = HttpRequest.sendPost("http://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token="+access_token, path);
        System.out.println(id);
        String url ="https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=";
         Map
<String, Object> map = new HashMap<String, Object>(); map.put("path", "pages/index/index?###="+id);//你二維碼中跳向的地址 map.put("width", "430");//圖片大小 JSONObject json = JSONObject.fromObject(map); System.out.println(json); String res= HttpClientConnectionManager.httpPostWithJSON(url + access_token, json.toString(),id); System.out.println(res); return null; }

返回圖片保存 ,根據 id

public static String httpPostWithJSON(String url, String json,String id)
                throws Exception {
            String result = null;
            DefaultHttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost(url);
            httpPost.addHeader(HTTP.CONTENT_TYPE, "application/json");
      
            StringEntity se = new StringEntity(json);
            se.setContentType("application/json");
            se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,
                            "UTF-8"));
            httpPost.setEntity(se);
            // httpClient.execute(httpPost);
            HttpResponse response = httpClient.execute(httpPost);
            if (response != null) {
                HttpEntity resEntity = response.getEntity();
                if (resEntity != null) {
                        InputStream instreams = resEntity.getContent(); 
                        String uploadSysUrl = "D://erweima/";
                        File saveFile = new File(uploadSysUrl+id+".png");
                           // 判斷這個文件(saveFile)是否存在
                           if (!saveFile.getParentFile().exists()) {
                               // 如果不存在就創建這個文件夾
                               saveFile.getParentFile().mkdirs();
                           }
                    saveToImgByInputStream(instreams, uploadSysUrl, id+".png");
                }
            }
            httpPost.abort();
            return result;
        } 
         
        /* @param instreams 二進制流
    * @param imgPath 圖片的保存路徑
    * @param imgName 圖片的名稱
    * @return
    *      1:保存正常
    *      0:保存失敗
    */
   public static int saveToImgByInputStream(InputStream instreams,String imgPath,String imgName){
  
       int stateInt = 1;
       if(instreams != null){
           try {
               File file=new File(imgPath+imgName);//可以是任何圖片格式.jpg,.png等
               FileOutputStream fos=new FileOutputStream(file);
                    
               byte[] b = new byte[1024];
               int nRead = 0;
               while ((nRead = instreams.read(b)) != -1) {
                   fos.write(b, 0, nRead);
               }
               fos.flush();
               fos.close();                
           } catch (Exception e) {
               stateInt = 0;
               e.printStackTrace();
           } finally {
               try {
                instreams.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
           }
       }
       return stateInt;
   }

然後是圖片重合和增加字體

public void changeImage(String imageurl,String i ){
        try { 
//            InputStream imagein = new FileInputStream(
//                    "D:/systemAvatarNew1.png");
//            InputStream imagein2 = new FileInputStream(
//                    "D:/qqfile/1852230493/FileRecv/4-02.png");
            InputStream imagein = new FileInputStream(
                    "D:/systemAvatarNew1.png");
            InputStream imagein2 = new FileInputStream(
                    imageurl);

            BufferedImage image = ImageIO.read(imagein);
            BufferedImage image2 = ImageIO.read(imagein2); 
            //image2.getWidth() - 160, image2.getHeight() - 155,
            Graphics g = image.getGraphics();
            g.drawImage(image2, 300, 230, 410,422,null);
//            g.drawImage(image2, image.getWidth() - image2.getWidth() - 195,
//                    image.getHeight() - image2.getHeight() - 190,
//                     340,349,null);
            OutputStream outImage = new FileOutputStream(
                    imageurl);
            JPEGImageEncoder enc = JPEGCodec.createJPEGEncoder(outImage);
            enc.encode(image);
            
            
            BufferedImage bimg=ImageIO.read(new FileInputStream(imageurl));  
            //得到Graphics2D 對象  
            Graphics2D g2d=(Graphics2D)bimg.getGraphics();  
            //設置顏色和畫筆粗細  
            g2d.setColor(Color.black);  
            g2d.setStroke(new BasicStroke(5));  
            //String pathString = "D://qqfile/1852230493/FileRecv/SourceHanSansCN-/SourceHanSansCN-Heavy.otf";
//            Font dynamicFont = Font.createFont(Font.TRUETYPE_FONT, new File(pathString));
            
            g2d.setFont(new Font("微軟雅黑", Font.PLAIN, 36));  
            //g2d.setFont(Loadfont.loadFont(pathString, 45));  
            //繪制圖案或文字  
            g2d.drawString("編號: "+i, 320, 700);  
          //  g2d.drawString(i, 450, 700);    
            
            ImageIO.write(bimg, "JPG",new FileOutputStream(imageurl));
            
            
            File fromFile = new File(imageurl);  
            File toFile = new File(imageurl);  
            Image1 Image1 =new Image1();
            Image1.resizePng(fromFile, toFile, 1000, 1000, false);
            
               
            
            imagein.close();
            imagein2.close();
            outImage.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

接下來再 main方法裏面跑一下 就ok ,如果是需要返回前臺信息的,就直接記錄地址,前臺顯示就可以了

技術分享

需要源碼的可以加qq1852230493

java微信小程序參數二維碼生成帶背景圖加字體(無限生成)