微信公众号扫一扫封装接口

一.微信准备功能

1.准备备案域名以及80端口服务器

本人准备是花生壳6元测试版

注册花生壳流程本人博客介绍花生壳IP配置流程

2.申请一个公众号

本人申请为个人订阅号（搜索公众号即可注册）

3.公众号配置appId和appsecret以及白名单

登录公众号——》选择左功能菜单开发——》基本配置（注意白名单里配置为服务器的外网IP）

4.公众号JS接口安全域名配置

填写域名，下载文件到tomcat/webapps/root下面

用域名加文件名，可以访问里面的内容即验证成功

二.代码实现功能（需加入公众号的appId和appsecret）

1.微信扫一扫功能封装接口wechatOpt.js

/*** 微信相关通用操作js*/var weChatObj = {//微信扫一扫配置wxScanConfig : function(url,callback){var sUrl = window.location.href;//mylayer.loading();$.ajax({url:url,type:"post",data:{"s_url":sUrl},dataType:"json",async: false,success:function(data){layer.closeAll();if(data.success){var retData = data.obj;wx.config({debug:false , // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。appId: retData.appId, // 必填，公众号的唯一标识timestamp:retData.timestamp, // 必填，生成签名的时间戳nonceStr: retData.nonceStr, // 必填，生成签名的随机串signature: retData.signature,// 必填，签名jsApiList: ['checkJsApi','scanQRCode'] // 必填，需要使用的JS接口列表}); weChatObj.wxScanCheck(callback);}},error:function(){ layer.closeAll(); // 数据异常需要关闭弹出层//mylayer.msg("网络繁忙,请刷新页面重试",{icon:2,time:1500});}});},//微信扫一扫jsApi检查wxScanCheck : function(callback){wx.ready(function () {wx.checkJsApi({jsApiList: ['checkJsApi','scanQRCode'],success: function (res) {weChatObj.wxScanCode(callback);}});});},//调用微信扫一扫接口wxScanCode : function(callback){wx.scanQRCode({needResult: 1, // 默认为0，扫描结果由微信处理，1则直接返回扫描结果，scanType: ["qrCode"], // 可以指定扫二维码还是一维码，默认二者都有success: function (res) {if(typeof callback == "function"){callback(res);} },cancel : function(res){wx.closeWindow();}});},//微信定位配置wxLocateConfig : function(callback){var sUrl = window.location.href;//mylayer.loading();$.ajax({url:"/AisinoCDWL/wechat/page/shware/getWxScanSign.do",type:"post",data:{"s_url":sUrl},dataType:"json",async: false,success:function(data){if(data.success){var retData = data.obj;wx.config({debug:false , // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。appId: retData.appId, // 必填，公众号的唯一标识timestamp:retData.timestamp, // 必填，生成签名的时间戳nonceStr: retData.nonceStr, // 必填，生成签名的随机串signature: retData.signature,// 必填，签名jsApiList: ['checkJsApi','openLocation','getLocation'] // 必填，需要使用的JS接口列表}); weChatObj.wxLocateCheck(callback);}else{//mylayer.msg("微信定位功能调用失败，请刷新重试",{icon:2,time:1500});}},error:function(){ layer.closeAll(); // 数据异常需要关闭弹出层//mylayer.msg("网络繁忙,请刷新页面重试",{icon:2,time:1500});}});},//微信jsApi检查wxLocateCheck : function(callback){wx.ready(function () {wx.checkJsApi({jsApiList: ['getLocation'],success: function (res) {if (res.checkResult.getLocation == false) {// mylayer.msg('你的微信版本太低，不支持微信JS接口，请升级到最新的微信版本！',{icon:2,time:1500});return;}if(typeof callback == "function"){callback(res);} }});});},//微信上传图片wxUploadImg : function(callback){var sUrl = window.location.href;$.ajax({url:"/AisinoCDWL/wechat/page/shware/getWxScanSign.do",type:"post",data:{"s_url":sUrl},dataType:"json",async: false,success:function(data){if(data.success){var retData = data.obj;wx.config({debug:false , // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。appId: retData.appId, // 必填，公众号的唯一标识timestamp:retData.timestamp, // 必填，生成签名的时间戳nonceStr: retData.nonceStr, // 必填，生成签名的随机串signature: retData.signature,// 必填，签名jsApiList: ['checkJsApi','chooseImage','uploadImage','downloadImage','getLocalImgData'] // 必填，需要使用的JS接口列表}); weChatObj.wxUploadImgCheck(callback);}else{//mylayer.msg("微信上传图片相关功能验证失败，请刷新重试",{icon:2,time:1500});}},error:function(){ layer.closeAll(); // 数据异常需要关闭弹出层//mylayer.msg("网络繁忙,请刷新页面重试",{icon:2,time:1500});}});},//验证上传图片相关微信接口wxUploadImgCheck : function(callback){wx.ready(function () {wx.checkJsApi({jsApiList: ['chooseImage','uploadImage','downloadImage','getLocalImgData'],success: function (res) {if (res.checkResult.getLocation == false) {//mylayer.msg('你的微信版本太低，不支持微信JS接口，请升级到最新的微信版本！',{icon:2,time:1500}); return;}if(typeof callback == "function"){callback(res);} }});});}};

2.微信前端调用扫一扫方法wechatmbl.jsp

​<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()+ path + "/";%><html><head><title></title><!--引用微信JS库--><script type="text/javascript" src="http://res./open/js/jweixin-1.4.0.js"></script><!--引用jQuery库--><script type="text/javascript" src="<%=basePath%>static/js/jquery-2.1.4.js"></script><script type="text/javascript" src="<%=basePath%>static/js/wechatOpt.js"></script><script type="text/javascript" src="<%=basePath%>static/js/layer.js"></script><meta charset="utf-8"><script type="text/javascript">var basePath = '<%=basePath%>';var url = basePath+ "wechat/page/shware/getWxScanSign.do";weChatObj.wxScanConfig(url,callback);//扫一扫的回调函数function callback(res){var result = JSON.parse(res.resultStr);alert(result);}</script></head><body><!-- <input type="button" value="扫一扫" id="scanQRCode"> --><!-- <img src="static/Screenshot_1031-104946.jpg"> --></body></html>​

3.Https请求工具类HttpsUtil.java

package com.cooperation.weixin.util;import java.security.cert.CertificateException;import java.security.cert.X509Certificate;import .ssl.X509TrustManager;/*** 类名: MyX509TrustManager </br>* 描述:信任管理器 </br>* 开发人员： howin </br>* 创建时间： -08-19 </br>* 发布版本：V1.0 </br>*//** 证书管理器的作用是让它新人我们指定的证书，* 此类中的代码意味着信任所有的证书，不管是不是权威机构颁发的。*/public class MyX509TrustManager implements X509TrustManager {// 检查客户端证书public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {}// 检查服务器端证书public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {}// 返回受信任的X509证书数组public X509Certificate[] getAcceptedIssuers() {return null;}}

package com.taxsearch.util.KBUtil;import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import .ConnectException;import .URL;import .ssl.HttpsURLConnection;import .ssl.SSLContext;import .ssl.SSLSocketFactory;import .ssl.TrustManager;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import net.sf.json.JSONObject;public class HttpsUtil {private static Logger log = LoggerFactory.getLogger(HttpsUtil.class); /*** @Title: httpsRequest* @Description: (HTTP請求)* @param: @param requestUrl* @param: @param requestMethod* @param: @param outputStr* @param: @return * @return: JSONObject * @throws*/public static JSONObject httpsRequest(String requestUrl, String requestMethod, String outputStr) {JSONObject jsonObject = null;try {// 创建SSLContext对象，并使用我们指定的信任管理器初始化TrustManager[] tm = { new MyX509TrustManager() };SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");sslContext.init(null, tm, new java.security.SecureRandom());// 从上述SSLContext对象中得到SSLSocketFactory对象SSLSocketFactory ssf = sslContext.getSocketFactory();URL url = new URL(requestUrl);HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();conn.setSSLSocketFactory(ssf);conn.setDoOutput(true);conn.setDoInput(true);conn.setUseCaches(false);// 设置请求方式（GET/POST）conn.setRequestMethod(requestMethod);// 当outputStr不为null时向输出流写数据if (null != outputStr) {OutputStream outputStream = conn.getOutputStream();// 注意编码格式outputStream.write(outputStr.getBytes("UTF-8"));outputStream.close();}// 从输入流读取返回内容InputStream inputStream = conn.getInputStream();InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");BufferedReader bufferedReader = new BufferedReader(inputStreamReader);String str = null;StringBuffer buffer = new StringBuffer();while ((str = bufferedReader.readLine()) != null) {buffer.append(str);}// 释放资源bufferedReader.close();inputStreamReader.close();inputStream.close();inputStream = null;conn.disconnect();jsonObject = JSONObject.fromObject(buffer.toString());} catch (ConnectException ce) {log.error("连接超时：{}", ce);} catch (Exception e) {log.error("https请求异常：{}", e);}return jsonObject;}}

4.微信扫一扫后台接口，获取access_token，签名等WechatMblController.java

package com.taxsearch.controller.kp;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import java.util.Arrays;import java.util.HashMap;import java.util.Map;import java.util.Random;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import net.sf.json.JSONObject;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.servlet.ModelAndView;import mons.BaseController;import mons.Logger;import com.taxsearch.util.Json;import com.taxsearch.util.KBUtil.HttpsUtil;/*** * <移动端-商品扫描Controller>* @author swj* @version [版本号, 4月24日]* @see [相关类/方法]* @since [产品/模块版本]*/@Controller("wechatMblController")public class WechatMblController{private static final Logger log = Logger.getLogger(BaseController.class);/*** * @file_name : WechatMblController.java* @method : wechat* @description : 进入扫描页面* @author : linsa* @return* @date : 11月2日* @return : ModelAndView*/@RequestMapping(value="/wechat")public ModelAndView wechat(){ModelAndView mv=new ModelAndView();mv.setViewName("wl/wechatmbl");return mv;}/*** * <获取微信扫一扫签名>* @author swj* @date 4月24日* @param request* @param response* @param session* @param model* @see [类、类#方法、类#成员]*/@RequestMapping("wechat/page/shware/getWxScanSign")@ResponseBodypublic Json getWxScanSign(HttpServletRequest request,HttpServletResponse response, HttpSession session, Model model){Json retMap = new Json();String appId = "此为appID";String appsecret = "此为app密钥";//获取access_tokenString access_token = getToken(appId, appsecret);//获取JSTicketString sJsapiTicket = getJSTicket(access_token);Map<String,String> signResult = new HashMap<String,String>();String jsUrl = Str(request.getParameter("s_url"));log.info("获取调用页面： "+jsUrl);String timestamp = String.valueOf(System.currentTimeMillis() / 1000);String nonceStr = getCharAndNumr(15);try {String signature = getSignature(sJsapiTicket, timestamp, nonceStr,jsUrl);signResult.put("appId", appId);signResult.put("timestamp", timestamp);signResult.put("nonceStr", nonceStr);signResult.put("signature", signature);retMap.setSuccess(true);retMap.setMsg("微信API签名获取成功！");retMap.setObj(signResult);log.info("获取微信签名完成："+signResult+", jsUrl: "+jsUrl+",sJsapiTicket: "+sJsapiTicket);} catch (Exception e) {e.printStackTrace();retMap.setSuccess(false);retMap.setMsg("微信API签名获取失败！");}return retMap;}public String getSignature(String jsapi_ticket, String timestamp,String nonce, String jsurl) throws Exception {/***** 对 jsapi_ticket、 timestamp 和 nonce 按字典排序 对所有待签名参数按照字段名的 ASCII* 码从小到大排序（字典序）后，使用 URL 键值对的格式（即key1=value1&key2=value2…）拼接成字符串* string1。这里需要注意的是所有参数名均为小写字符。 接下来对 string1 作 sha1 加密，字段名和字段值都采用原始值，不进行* URL 转义。即 signature=sha1(string1)。* **如果没有按照生成的key1=value&key2=value拼接的话会报错*/String[] paramArr = new String[] { "jsapi_ticket=" + jsapi_ticket,"timestamp=" + timestamp, "noncestr=" + nonce, "url=" + jsurl };Arrays.sort(paramArr);// 将排序后的结果拼接成一个字符串String content = paramArr[0].concat("&" + paramArr[1]).concat("&" + paramArr[2]).concat("&" + paramArr[3]);// System.out.println("拼接之后的content为:"+content);String gensignature = null;try {MessageDigest md = MessageDigest.getInstance("SHA-1");// 对拼接后的字符串进行 sha1 加密byte[] digest = md.digest(content.toString().getBytes());gensignature = byteToStr(digest);} catch (NoSuchAlgorithmException e) {// e.printStackTrace();log.error(e);}// 将 sha1 加密后的字符串与 signature 进行对比if (gensignature != null) {return gensignature;// 返回signature} else {return "false";}}/*** 将字节数组转换为十六进制字符串* * @param byteArray* @return*/private String byteToStr(byte[] byteArray) {String strDigest = "";for (int i = 0; i < byteArray.length; i++) {strDigest += byteToHexStr(byteArray[i]);}return strDigest;}/*** 将字节转换为十六进制字符串* * @param mByte* @return*/private String byteToHexStr(byte mByte) {char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A','B', 'C', 'D', 'E', 'F' };char[] tempArr = new char[2];tempArr[0] = Digit[(mByte >>> 4) & 0X0F];tempArr[1] = Digit[mByte & 0X0F];String s = new String(tempArr);return s;}public String getCharAndNumr(int length) {String val = "";Random random = new Random();for (int i = 0; i < length; i++) {// 输出字母还是数字String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num";// 字符串if ("char".equalsIgnoreCase(charOrNum)) {// 取得大写字母还是小写字母int choice = random.nextInt(2) % 2 == 0 ? 65 : 97;val += (char) (choice + random.nextInt(26));} else if ("num".equalsIgnoreCase(charOrNum)) { // 数字val += String.valueOf(random.nextInt(10));}}return val;}public String Str(Object obj){String str = "";if(obj!=null&&obj!=""){str = obj.toString();}return str;}/*** 获取access_token* @author gaomin* @date /11/2**/public String getToken(String appId, String appsecret){String infoUrl = "https://api./cgi-bin/token?grant_type=client_credential&appid="+appId+"&secret="+appsecret;JSONObject result = HttpsUtil.httpsRequest(infoUrl, "GET", null);String access_token = "";if(result.containsKey("errcode")){access_token = "";}else{access_token = (String)result.get("access_token");}return access_token;}/*** 获取JSTicket* @author gaomin* @date /11/2**/public String getJSTicket(String access_token){String infoUrl = "https://api./cgi-bin/ticket/getticket?type=jsapi&access_token="+ access_token;JSONObject result = HttpsUtil.httpsRequest(infoUrl, "GET", null);String jsTicket = (String)result.get("ticket");return jsTicket;}}