從接觸公眾號到現在，通過不斷積累學習，對如何調用微信提供接口有了一定的見解。當然在開發過程中遇到很多問題，現在把部分模塊功能在這備案一下，做個總結也希望能給其他人幫助

工欲善其事，必先利其器，先看看開發公眾號需要準備或了解什么

web開發工具：官方提供的開發工具，使用自己的微信號來調試微信網頁授權、調試、檢驗頁面的 JS-SDK 相關功能與權限，模擬大部分 SDK 的輸入和輸出。下載地址：web開發工具下載

開發文檔：https://mp.weixin.qq.com/wiki

登錄微信測試公眾號，獲取公眾號的appID、appsecret，登錄地址：http://mp.weixin.qq.com/debug/cgi-bin/sandbox?t=sandbox/login?（一般測試開發階段，都不拿正式公眾號測試，因為存在風險并且你調試時不用擔心影響到正式公眾號的正常使用，而且有些接口在正式公眾號上比較嚴格，而在測試公眾號上可以放開，如模板信息）

下面進入正題，實現微信網頁授權，獲取微信信息，主要用于以微信帳號作為用戶登錄，如果你只是需要綁定微信，就可以不用授權，直接請求獲取微信OpenId（對當前公眾號唯一），進行用戶綁定（在下面代碼時是寫明如何實現），該功能可在開發文檔：微信網頁開發-》微信網頁授權里查看詳細信息，下面正式開始。

1.填寫授權回調頁面域名

進入測試公眾號，在體驗接口權限表中找到網頁帳號，右側添加自己的域名，測試公眾號可填寫本地IP，如你是正式公眾號只能填寫自己的域名，如果未填寫，當進行接口調用時，會提示：redirect_uri參數錯誤！如果還有其他不了解的配置，可以在開發文檔里查看詳信息，

2.代碼展示

1).調用微信接口返回的參數都是JSON格式，封裝個Http請求方法 [java]?view plaincopy

public?class?WeixinUtil?{??

???????/**?

?????*?發起https請求并獲取結果?

?????*?@param?requestUrl?請求地址?

?????*?@param?requestMethod?請求方式（GET、POST）?

?????*?@param?outputStr?提交的數據?

?????*?@return?JSONObject(通過JSONObject.get(key)的方式獲取json對象的屬性值)?

?????*/??

???public?static?JSONObject?httpRequest(String?requestUrl,?String?requestMethod,?String?outputStr)?{??

????JSONObject?jsonObject?=?null;??

????StringBuffer?buffer?=?new?StringBuffer();??

????try?{??

????????//?創建SSLContext對象，并使用我們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());??

????????//?從上述SSLContext對象中得到SSLSocketFactory對象??

????????SSLSocketFactory?ssf?=?sslContext.getSocketFactory();??

????????URL?url?=?new?URL(requestUrl);??

????????HttpsURLConnection?httpUrlConn?=?(HttpsURLConnection)?url.openConnection();??

????????httpUrlConn.setSSLSocketFactory(ssf);??

????????httpUrlConn.setDoOutput(true);??

????????httpUrlConn.setDoInput(true);??

????????httpUrlConn.setUseCaches(false);??

????????//?設置請求方式（GET/POST）??

????????httpUrlConn.setRequestMethod(requestMethod);??

????????if?("GET".equalsIgnoreCase(requestMethod))??

????????????httpUrlConn.connect();??

????????//?當有數據需要提交時??

????????if?(null?!=?outputStr)?{??

????????????OutputStream?outputStream?=?httpUrlConn.getOutputStream();??

????????????//?注意編碼格式，防止中文亂碼??

????????????outputStream.write(outputStr.getBytes("UTF-8"));??

????????????outputStream.close();??

????????}??

????????//?將返回的輸入流轉換成字符串??

????????InputStream?inputStream?=?httpUrlConn.getInputStream();??

????????InputStreamReader?inputStreamReader?=?new?InputStreamReader(inputStream,?"utf-8");??

????????BufferedReader?bufferedReader?=?new?BufferedReader(inputStreamReader);??

????????String?str?=?null;??

????????while?((str?=?bufferedReader.readLine())?!=?null)?{??

????????????buffer.append(str);??

????????}??

????????bufferedReader.close();??

????????inputStreamReader.close();??

????????//?釋放資源??

????????inputStream.close();??

????????inputStream?=?null;??

????????httpUrlConn.disconnect();??

????????jsonObject?=?JSONObject.fromObject(buffer.toString());??

????}?catch?(ConnectException?ce)?{??

????????log.error("Weixin?server?connection?timed?out.");??

????}?catch?(Exception?e)?{??

????????log.error("https?request?error:{}",?e);??

????}??

????return?jsonObject;??

????}??

}??

2).下面展示訪問個人中心時，進行用戶授權 [java]?view plaincopy

/**?

?*?個人中心?

?*?@param?request?

?*?@param?response?

?*?@return?

?*/??

@RequestMapping("/gotoPeopleIndex")??

public?String?gotoPeopleIndex(HttpServletRequest?request,HttpServletResponse?response){??

????//判斷是否授權過，授權通過時，會保存session“WeixinUserInfo”，這樣下次訪問時，如果WeixinUserInfo存在，說明已經授權過，用戶信息已經存在??

????WeixinUserInfo?WeixinUserInfo?=??(WeixinUserInfo)?session.getAttribute("WeixinUserInfo");??

????if(WeixinUserInfo==null){//沒有授權過，跳轉授權頁面，如果你不需要授權，則scope為snsapi_base，這是不會彈出授權頁面??

????????String?url??=?"https://open.weixin.qq.com/connect/oauth2/authorize?appid="+TimedTask.appid+"&redirect_uri="+TimedTask.websiteAndProject+"/weixinF/getOpenInfo/gotoPeopleIndex&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect";??

????????return?"redirect:"+url;??

????}else{??

????????return?"weixin/customer/userInfo";??

????}??

}??

/**?

?*?微信網頁授權獲得微信詳情?

?*?@param?code?

?*?@param?state?

?*?@param?view?授權后調整的視圖?

?*?@param?request?

?*?@param?appid?公眾號appid?

?*?@param?appsecret?公眾號appsecret?

?*?@param?websiteAndProject??請求地址跟工程名，如我當前的為http://192.168.2.113/seafood?

?*?@param?response?

?*?@throws?ServletException?

?*?@throws?IOException?

?*/??

@RequestMapping("/getOpenInfo/{view}")??

public?void?getOpenInfo(@RequestParam("code")?String?code,@RequestParam("state")?String?state,@PathVariable("view")?String?view,HttpServletRequest?request,HttpServletResponse?response)?throws?ServletException,?IOException{??

????//?用戶同意授權??

????if?(!"authdeny".equals(code))?{??

????????//獲取OpenId??

????????OpenIdResult?open?=?WeixinUtil.getOpenId(request,?code,?TimedTask.appid,?TimedTask.appsecret);??

????????//檢驗授權憑證（access_token）是否有效??

????????int?result?=?WeixinUtil.checkAccessToken(open.getAccess_token(),?open.getOpenid());??

????????if(0?!=?result){??

????????????open?=?WeixinUtil.getNewAccess_Token(open,open.getRefresh_token(),TimedTask.appid);??

????????}??

????????//?網頁授權接口訪問憑證??

????????String?accessToken?=?open.getAccess_token();??

????????String?openId?=?open.getOpenid();??

????????//獲取微信用戶詳細信息，如果你不需要授權，可跳過該步驟，直接以微信的OpenId，查找是否已經綁定，沒有跳轉到綁定界面??

????????WeixinUserInfo?user?=?WeixinUtil.getWeixinUserInfo(accessToken,?openId);??

????????Customer?customer?=?weixinFirstServer.getCustomerDetailByOpenId(user.getOpenId());??

????????if(customer!=null){??

????????????if(customer.getAccountStatus()==2){??

????????????????response.setContentType("text/html;?charset=UTF-8");??

????????????????try?{??

????????????????????response.sendRedirect(TimedTask.websiteAndProject+"/weixin/customer/noAuthority.jsp");??

????????????????}?catch?(IOException?e)?{??

????????????????????e.printStackTrace();??

????????????????}??

????????????????return;??

????????????}??

????????????customer.setHeadPhoto(user.getHeadImgUrl());??

????????}else{??

????????????Customer?newuser?=?new?Customer();??

????????????newuser.setCustomerWeixinId(openId);??

????????????newuser.setCustomerWNickname(user.getNickname());??

????????????newuser.setSex(user.getSex());??

????????????//綁定??

????????????result?=?weixinFirstServer.addCustomerInfo(newuser);??

????????????if(result<=0){??

????????????????response.setContentType("text/html;?charset=UTF-8");??

????????????????try?{??

????????????????????response.sendRedirect(TimedTask.websiteAndProject+"/weixin/customer/error.jsp");??

????????????????}?catch?(IOException?e)?{??

????????????????????e.printStackTrace();??

????????????????}??

????????????}else{??

????????????????customer?=?weixinFirstServer.getCustomerDetailByOpenId(user.getOpenId());??

????????????????if(customer.getAccountStatus()==2){??

????????????????????response.setContentType("text/html;?charset=UTF-8");??

????????????????????try?{??

????????????????????????response.sendRedirect(TimedTask.websiteAndProject+"/weixin/customer/noAuthority.jsp");??

????????????????????}?catch?(IOException?e)?{??

????????????????????????e.printStackTrace();??

????????????????????}??

????????????????????return;??

????????????????}??

????????????}??

????????}??

????????session.setAttribute("customerInfo",?customer);??

????????session.setAttribute("WeixinUserInfo",?user);??

????????request.setAttribute("state",?state);??

????????response.setContentType("text/html;?charset=UTF-8");??

????????try?{??

????????????response.sendRedirect(TimedTask.websiteAndProject+"/weixinF/"+view);??

????????}?catch?(IOException?e)?{??

????????????e.printStackTrace();??

????????}??

????}else{??

????????response.setContentType("text/html;?charset=UTF-8");??

????????try?{??

????????????response.sendRedirect(TimedTask.websiteAndProject+"/weixin/customer/error.jsp");??

????????}?catch?(IOException?e)?{??

????????????e.printStackTrace();??

????????}??

????}??

}??

微信工具類代碼： [java]?view plaincopy

public?class?WeixinUtil?{??

????public?final?static?String?getOpen_id_url?=?"https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code";??

????/**?

?????*?檢驗授權憑證（access_token）是否有效?

?????*?@param?accessToken?憑證?

?????*?@param?openid?id?

?????*?@return?

?????*/??

????public?static?int?checkAccessToken(String?accessToken,?String?openid)?{??

????????String?requestUrl?=?"https://api.weixin.qq.com/sns/auth?access_token="+accessToken+"&openid="+openid;??

????????JSONObject?jsonObject?=?httpRequest(requestUrl,?"GET",?null);??

????????int?result?=?1;??

????????//?如果請求成功??

????????if?(null?!=?jsonObject)?{??

????????????try?{??

????????????????result?=?jsonObject.getInt("errcode");??

????????????}?catch?(JSONException?e)?{??

????????????????accessToken?=?null;??

????????????????//?獲取token失敗??

????????????????log.error("獲取token失敗?errcode:{}?errmsg:{}",?jsonObject.getInt("errcode"),?jsonObject.getString("errmsg"));??

????????????}??

????????}??

????????return?result;??

????}??

????/**?

?????*?用戶授權，使用refresh_token刷新access_token?

?????*?@return?

?????*/??

????public?static?OpenIdResult?getNewAccess_Token(OpenIdResult?open,String?refresh_token,String?openId)?{??

????????String?requestUrl?=?getNewAccess_token.replace("REFRESH_TOKEN",?refresh_token).replace("APPID",?openId);??

????????JSONObject?jsonObject?=?httpRequest(requestUrl,?"GET",?null);??

????????//?如果請求成功??

????????if?(null?!=?jsonObject)?{??

????????????try?{??

????????????????open.setAccess_token(jsonObject.getString("access_token"));??

????????????}?catch?(JSONException?e)?{??

????????????????//?獲取token失敗??

????????????????log.error("獲取token失敗?errcode:{}?errmsg:{}",?jsonObject.getInt("errcode"),?jsonObject.getString("errmsg"));??

????????????}??

????????}??

????????return?open;??

????}??

????/**?

?????*?獲得用戶基本信息?

?????*?@param?request??

?????*?@param?code?

?????*?@param?appid?

?????*?@param?appsecret?

?????*?@return?

?????*/??

????public?static?OpenIdResult?getOpenId(HttpServletRequest?request,?String?code,String?appid,?String?appsecret)?{??

????????String?requestURI?=?request.getRequestURI();??

????????String?param?=?request.getQueryString();??

????????if(param!=null){??

????????????requestURI?=?requestURI+"?"+param;??

????????}??

????????String?url?=?getOpen_id_url.replace("APPID",appid).replace("SECRET",appsecret).replace("CODE",code);??

????????JSONObject?jsonObject?=?httpRequest(url,?"POST",?null);??

????????OpenIdResult?result?=?new?OpenIdResult();??

????????if?(null?!=?jsonObject)?{??

????????????Object?obj?=?jsonObject.get("errcode");??

????????????if?(obj?==?null)?{??

????????????????result.setAccess_token(jsonObject.getString("access_token"));??

????????????????result.setExpires_in(jsonObject.getString("expires_in"));??

????????????????result.setOpenid(jsonObject.getString("openid"));??

????????????????result.setRefresh_token(jsonObject.getString("refresh_token"));??

????????????????result.setScope(jsonObject.getString("scope"));??

????????????}else{??

????????????????System.out.println("獲取openId回執："+jsonObject.toString()+"訪問路徑："+requestURI);??

????????????????log.error("訪問路徑:"+requestURI);??

????????????????log.error("獲取openId失敗?errcode:{}?errmsg:{}",?jsonObject.getInt("errcode"),?jsonObject.getString("errmsg"));??

????????????}??

????????}??

????????return?result;??

????}??

????/**?

?????*?通過網頁授權獲取用戶信息?

?????*?@param?accessToken?網頁授權接口調用憑證?

?????*?@param?openId?用戶標識?

?????*?@return?WeixinUserInfo?

?????*/??

????public?static?WeixinUserInfo?getWeixinUserInfo(String?accessToken,?String?openId)?{??

????????WeixinUserInfo?user?=?null;??

????????//?拼接請求地址??

????????String?requestUrl?=?"https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID";??

????????requestUrl?=?requestUrl.replace("ACCESS_TOKEN",?accessToken).replace("OPENID",?openId);??

????????//?通過網頁授權獲取用戶信息??

????????JSONObject?jsonObject?=?httpRequest(requestUrl,?"GET",?null);??

????????if?(null?!=?jsonObject)?{??

????????????try?{??

????????????????user?=?new?WeixinUserInfo();??

????????????????//?用戶的標識??

????????????????user.setOpenId(jsonObject.getString("openid"));??

????????????????//?昵稱??

????????????????user.setNickname(jsonObject.getString("nickname"));??

????????????????//?性別（1是男性，2是女性，0是未知）??

????????????????user.setSex(jsonObject.getInt("sex"));??

????????????????//?用戶所在國家??

????????????????user.setCountry(jsonObject.getString("country"));??

????????????????//?用戶所在省份??

????????????????user.setProvince(jsonObject.getString("province"));??

????????????????//?用戶所在城市??

????????????????user.setCity(jsonObject.getString("city"));??

????????????????//?用戶頭像??

????????????????user.setHeadImgUrl(jsonObject.getString("headimgurl"));??

????????????????//?用戶特權信息??

????????????????user.setPrivilegeList(JSONArray.toList(jsonObject.getJSONArray("privilege"),?List.class));??

????????????}?catch?(Exception?e)?{??

????????????????user?=?null;??

????????????????int?errorCode?=?jsonObject.getInt("errcode");??

????????????????String?errorMsg?=?jsonObject.getString("errmsg");??

????????????????log.error("獲取用戶信息失敗?errcode:{}?errmsg:{}，reqUrl{}",?errorCode,?errorMsg);??

????????????}??

????????}??

????????return?user;??

????}??

}??

下面展示，當用戶session失效時，自動登錄的代碼，這時是不需要授權的 [java]?view plaincopy

@RequestMapping("/gotoGoodsView")??

public?String?gotoGoodsView(@RequestParam(value="longitude",defaultValue="",required=false)?String?longitude,@RequestParam(value="latitude",defaultValue="",required=false)?String?latitude){??

????String?param?=?request.getQueryString();??

????String?url?=?request.getServletPath();??

????if(param!=null){??

????????url?=?url+"?"+param.replaceAll("&","-");//如果不把&替換成別的，當重新登錄成功后調整會參數丟失??

????}??

????Customer?customerInfo?=?(Customer)?session.getAttribute("customerInfo");??

????if(customerInfo==null){//session失效，跳轉到獲取微信詳情頁面（授權）??

????????return?"redirect:/weixinF/getCode?view="+TimedTask.websiteAndProject+"/weixinF/autoLogin&view2="+TimedTask.websiteAndProject+url;??

????}??

????return?"/weixin/customer/goodsList";??

}??

@RequestMapping("/getCode")??

public?void?getCode(HttpServletResponse?response){??

????String?view??=?request.getParameter("view");//獲取openId的路徑??

????String?view2??=?request.getParameter("view2");//獲取openId成功后跳轉的路徑??

????String?redirect_url?=?"";??

????try?{??

????????redirect_url?=?URLEncoder.encode(view,"UTF-8");??

????????if(view2!=null?&&?!"".equals(view2)){??

????????????view2?=?view2.replaceAll("-","&");??

????????????redirect_url?=?redirect_url?+"?redirect_url="+?URLEncoder.encode(URLEncoder.encode(view2,"UTF-8"),"UTF-8");??

????????}??

????}?catch?(UnsupportedEncodingException?e1)?{??

????????e1.printStackTrace();??

????}??

????String?url?=?WeixinUtil.getCode_url.replace("APPID",TimedTask.appid).replace("REDIRECT_URI",redirect_url);??

????response.setContentType("text/html;?charset=UTF-8");??

????try?{??

????????response.sendRedirect(url);??

????}?catch?(IOException?e)?{??

????????e.printStackTrace();??

????}??

}??

/**?

?*?自動登錄并跳轉?

?*?@param?code?

?*?@param?appid?公眾號appid?

?*?@param?appsecret?公眾號appsecret?

?*?@param?websiteAndProject??請求地址跟工程名，如我當前的為http://192.168.2.113/seafood?

?*?@param?url?自動登錄后跳轉路徑?

?*?@return?

?*/??

@RequestMapping("/autoLogin")??

public?String?autoLogin(HttpServletResponse?response,@RequestParam(value="code",defaultValue="")?String?code,@RequestParam(value="redirect_url",defaultValue="")?String?url){??

????OpenIdResult?open?=?WeixinUtil.getOpenId(request,code,TimedTask.appid,TimedTask.appsecret);//根據Code獲取OpenId??

????//根據OpenId查找是否有該客戶，沒有進行綁定??

????Customer?customerInfo?=?weixinFirstServer.getCustomerDetailByOpenId(open.getOpenid());??

????if(customerInfo!=null){??

????????if(customerInfo.getAccountStatus()==2){//用戶賬戶是否正常??

????????????return?"redirect:"+TimedTask.websiteAndProject+"/weixin/customer/noAuthority.jsp";??

????????}??

????????session.setAttribute("customerInfo",?customerInfo);//把用戶信息存在session中??

????????response.setContentType("text/html;?charset=UTF-8");??

????????try?{??

????????????response.sendRedirect(url);??

????????}?catch?(IOException?e)?{??

????????????e.printStackTrace();??

????????}??

????????return?null;??

????}else{??

????????url=?url.replaceAll("&","-");??

????????url?=?url.replace(TimedTask.websiteAndProject,"");??

????????String?redirectUrl??=?"https://open.weixin.qq.com/connect/oauth2/authorize?appid="+TimedTask.appid+"&redirect_uri="+TimedTask.websiteAndProject+"/weixinF/getOpenInfoRedirectAction?actionName="+url+"&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect";??

????????response.setContentType("text/html;?charset=UTF-8");??

????????try?{??

????????????response.sendRedirect(redirectUrl);??

????????}?catch?(IOException?e)?{??

????????????e.printStackTrace();??

????????}??

????????return?null;??

????}??

}??

到此，微信網頁授權認證，與session失效自動登錄已經完成，如果有問題歡迎在評論區指出

總結

以上是生活随笔為你收集整理的（微信公众号开发《一》OAuth2.0网页授权认证获取用户的详细信息，实现自动登陆）http://blog.csdn.net/liaohaojian/article/details/70175835的全部內容，希望文章能夠幫你解決所遇到的問題。

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