java微信小程序參數二維碼生成帶背景圖加字體(無限生成)

java微信小程序參數二維碼生成帶背景圖加字體開發教程：

需求 ：  1，由於項目需求 ，生成數以萬計的二維碼 　　 　　 2 ，每一個二維碼帶不一樣的參數 　　 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 com.twelvemonkeys.imageio  imageio-jpeg  3.0-rc5  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()) { // 若是不存在就建立這個文件夾 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);//能夠是任何圖片格式.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; } 而後是圖片重合和增長字體 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)); //獲得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)); //繪製圖案或文字 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 ，若是是須要返回前臺信息的，就直接記錄地址，前臺顯示就能夠了