微信公众号开发进行 给前端进行授权返回信息 注意：url是动态获取，就是你请求支付页面的完整路径
//这里的url是动态获取，就是你请求支付页面的完整路径 可以i自己获取 也可以是前端传过来的 //获取 Signature @SuppressWarnings("unchecked") public String getSignature(String nonceStr, String timestamp, String url) { String signature = ""; String appid =WXConfig.getAppid();//微信公众号的appid String appsecret =WXConfig.getAppsecret();//微信公众号的appsecret //获取noncestr String noncestr = nonceStr; //获取timestamp //String timestamp = timestamp ; //获取access_token access_token = WXConfig.getAccessToken(appid , appsecret); //获取jsapi_ticket jsapi_ticket = WXConfig.getTicket(access_token); //将四个数据进行组合，传给SHA1进行加密 String str = "jsapi_ticket=" + jsapi_ticket + "&noncestr=" + noncestr + "×tamp=" + timestamp + "&url=" + url; System.out.println(str); //SHA1加密 signature = WXConfig.SHA1(str); return signature ; } //先获取access_token public static String getAccessToken(String appId , String appSecret){ // 网页授权接口 String GetPageAccessTokenUrl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+appId+"&secret="+appSecret; //https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=wx1ac1da6bd53d08c3&secret=905b123c21f243cd45581b249076d893; HttpClient client = null; String access_token = null; int expires_in = 0; try { client = new DefaultHttpClient(); HttpGet httpget = new HttpGet(GetPageAccessTokenUrl); ResponseHandler<String> responseHandler = new BasicResponseHandler(); String response = client.execute(httpget, responseHandler); JSONObject OpenidJSONO = JSONObject.fromObject(response); access_token = String.valueOf(OpenidJSONO.get("access_token"));//获取access_token expires_in = Integer.parseInt(String.valueOf(OpenidJSONO.get("expires_in")));//获取时间 } catch (Exception e) { //throw new CommonRuntimeException("获取AccessToken出错！"); System.out.println("获取AccessToken出错！"); } finally { client.getConnectionManager().shutdown(); } return access_token; } //获取jsapi_ticket public static String getTicket(String accessToken) { // 网页授权接口 String GetPageAccessTokenUrl = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token="+accessToken+"&type=jsapi"; HttpClient client = null; String ticket = ""; int expires_in = 0; try { client = new DefaultHttpClient(); HttpGet httpget = new HttpGet(GetPageAccessTokenUrl); ResponseHandler<String> responseHandler = new BasicResponseHandler(); String response = client.execute(httpget, responseHandler); JSONObject OpenidJSONO = JSONObject.fromObject(response); ticket = String.valueOf(OpenidJSONO.get("ticket"));//获取ticket expires_in = Integer.parseInt(String.valueOf(OpenidJSONO.get("expires_in")));//获取时间 } catch (Exception e) { //throw new CommonRuntimeException("获取Ticket出错！"); System.out.println("获取Ticket出错！"); } finally { client.getConnectionManager().shutdown(); } return ticket; } //SHA1加密，参数是由url、jsapi_ticket、noncestr、timestamp组合而成 public static String SHA1(String str) { try { MessageDigest digest = java.security.MessageDigest .getInstance("SHA-1"); //如果是SHA加密只需要将"SHA-1"改成"SHA"即可 digest.update(str.getBytes()); byte messageDigest[] = digest.digest(); // Create Hex String StringBuffer hexStr = new StringBuffer(); // 字节数组转换为 十六进制 数 for (int i = 0; i < messageDigest.length; i++) { String shaHex = Integer.toHexString(messageDigest[i] & 0xFF); if (shaHex.length() < 2) { hexStr.append(0); } hexStr.append(shaHex); } return hexStr.toString(); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } return null; }这就是获取access_token，Signature， jsapi_ticket
