258资源分享网

1需求 ：1，因为项目需求 ，生成数以万计的二维码 　　　　 2 ，每个二维码带不同的参数　　 3，二维码有固定背景图　　 4 ， 往生成图片上写入 字体和编号(动态 )设计技术 ：　1，微信接口token ，nginx 缓存　 2， ...

1 
需求 ： 
1，因为项目需求 ，生成数以万计的二维码 　　

　　 2 ，每个二维码带不同的参数

　　 3，二维码有固定背景图 
　　 4 ， 往生成图片上写入 字体和编号(动态 )

设计技术 ：

　1，微信接口token ，nginx 缓存

　 2，二维码 图片定义 写字

maven

com.twelvemonkeys.imageio 
imageio-jpeg 
3.0-rc5 

还有rt.jar 在你java安装文件的bin里面

获取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"); //缓存 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("出错获取token失败！"); } }

　　获取二维码 信息图片

public String GetPostUrl(String access_token,String id) throws Exception { //String result = HttpRequest.sendPost("?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);//你二维码中跳向的地址 map.put("width", "430");//图片大小 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; }

返回图片保存 ，根据 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"); // 判断这个文件（saveFile）是否存在 if (!saveFile.getParentFile().exists()) { // 如果不存在就创建这个文件夹 saveFile.getParentFile().mkdirs(); } saveToImgByInputStream(instreams, uploadSysUrl, id+".png"); } } httpPost.abort(); return result; } /* @param instreams 二进制流 * @param imgPath 图片的保存路径 * @param imgName 图片的名称 * @return * 1：保存正常 * 0：保存失败 */ public static int saveToImgByInputStream(InputStream instreams,String imgPath,String imgName){ int stateInt = 1; if(instreams != null){ try { File file=new File(imgPath+imgName);//可以是任何图片格式.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; }

然后是图片重合和增加字体